[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
asprintf into kselftest_harness.h, which is a GNU extension and needs
_GNU_SOURCE to either be defined prior to including headers or with the
-D_GNU_SOURCE flag passed to the compiler.

v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
location.  Remove #define _GNU_SOURCE from source code to resolve
redefinition warnings.

Edward Liaw (5):
  selftests: Compile kselftest headers with -D_GNU_SOURCE
  selftests/sgx: Include KHDR_INCLUDES in Makefile
  selftests: Include KHDR_INCLUDES in Makefile
  selftests: Drop define _GNU_SOURCE
  selftests: Drop duplicate -D_GNU_SOURCE

 tools/testing/selftests/Makefile                              | 4 ++--
 tools/testing/selftests/alsa/Makefile                         | 2 +-
 tools/testing/selftests/arm64/signal/Makefile                 | 2 +-
 tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
 tools/testing/selftests/capabilities/test_execve.c            | 2 --
 tools/testing/selftests/clone3/clone3.c                       | 2 --
 .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
 tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
 tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
 tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
 tools/testing/selftests/core/close_range_test.c               | 2 --
 tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
 tools/testing/selftests/exec/Makefile                         | 2 +-
 tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
 tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
 tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
 tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
 tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
 tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
 tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
 tools/testing/selftests/filesystems/overlayfs/Makefile        | 2 +-
 tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
 .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
 tools/testing/selftests/futex/functional/Makefile             | 2 +-
 tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
 tools/testing/selftests/hid/Makefile                          | 2 +-
 tools/testing/selftests/iommu/Makefile                        | 2 --
 tools/testing/selftests/ipc/msgque.c                          | 1 -
 tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
 tools/testing/selftests/kselftest_harness.h                   | 2 +-
 tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
 tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
 tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
 tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
 tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
 tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
 tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
 tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
 tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
 tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
 tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
 tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
 tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
 tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
 tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
 tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
 tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
 tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
 .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
 tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
 tools/testing/selftests/kvm/rseq_test.c                       | 1 -
 tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
 tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
 tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
 tools/testing/selftests/kvm/steal_time.c                      | 1 -
 tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
 tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
 .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
 tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
 .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
 tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
 tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
 tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
 tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
 tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
 .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
 tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
 tools/testing/selftests/landlock/base_test.c                  | 2 --
 tools/testing/selftests/landlock/fs_test.c                    | 2 --
 tools/testing/selftests/landlock/net_test.c                   | 2 --
 tools/testing/selftests/landlock/ptrace_test.c                | 2 --
 tools/testing/selftests/lib.mk                                | 2 +-
 tools/testing/selftests/lsm/common.c                          | 2 --
 tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
 tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
 tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
 tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
 .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
 .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
 tools/testing/selftests/memfd/common.c                        | 1 -
 tools/testing/selftests/memfd/fuse_test.c                     | 2 --
 tools/testing/selftests/memfd/memfd_test.c                    | 1 -
 tools/testing/selftests/mm/cow.c                              | 1 -
 tools/testing/selftests/mm/gup_longterm.c                     | 1 -
 tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
 tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
 tools/testing/selftests/mm/khugepaged.c                       | 1 -
 tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
 tools/testing/selftests/mm/madv_populate.c                    | 1 -
 tools/testing/selftests/mm/map_populate.c                     | 2 --
 tools/testing/selftests/mm/mdwe_test.c                        | 1 -
 tools/testing/selftests/mm/memfd_secret.c                     | 2 --
 tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
 tools/testing/selftests/mm/mrelease_test.c                    | 1 -
 tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
 tools/testing/selftests/mm/mremap_test.c                      | 2 --
 tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
 tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
 tools/testing/selftests/mm/protection_keys.c                  | 1 -
 tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
 tools/testing/selftests/mm/thuge-gen.c                        | 2 --
 tools/testing/selftests/mm/uffd-common.h                      | 1 -
 tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
 .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
 tools/testing/selftests/nci/Makefile                          | 2 +-
 tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
 tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
 tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
 tools/testing/selftests/net/csum.c                            | 3 ---
 tools/testing/selftests/net/gro.c                             | 3 ---
 tools/testing/selftests/net/ip_defrag.c                       | 3 ---
 tools/testing/selftests/net/ipsec.c                           | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
 tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
 tools/testing/selftests/net/nettest.c                         | 2 --
 tools/testing/selftests/net/psock_fanout.c                    | 3 ---
 tools/testing/selftests/net/psock_snd.c                       | 3 ---
 tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
 tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
 tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
 tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
 tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
 tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
 tools/testing/selftests/net/so_txtime.c                       | 3 ---
 tools/testing/selftests/net/tap.c                             | 3 ---
 tools/testing/selftests/net/tcp_ao/Makefile                   | 2 +-
 tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
 tools/testing/selftests/net/tcp_inq.c                         | 2 --
 tools/testing/selftests/net/tcp_mmap.c                        | 1 -
 tools/testing/selftests/net/tls.c                             | 3 ---
 tools/testing/selftests/net/toeplitz.c                        | 3 ---
 tools/testing/selftests/net/tun.c                             | 3 ---
 tools/testing/selftests/net/txring_overwrite.c                | 3 ---
 tools/testing/selftests/net/txtimestamp.c                     | 3 ---
 tools/testing/selftests/net/udpgso.c                          | 3 ---
 tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
 tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
 tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
 tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
 tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
 tools/testing/selftests/pidfd/pidfd.h                         | 1 -
 tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
 tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
 tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
 tools/testing/selftests/prctl/Makefile                        | 2 ++
 tools/testing/selftests/proc/Makefile                         | 2 +-
 tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
 tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
 tools/testing/selftests/resctrl/Makefile                      | 2 +-
 tools/testing/selftests/riscv/mm/Makefile                     | 2 +-
 tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
 tools/testing/selftests/rseq/basic_test.c                     | 2 --
 tools/testing/selftests/rseq/param_test.c                     | 1 -
 tools/testing/selftests/rseq/rseq.c                           | 2 --
 tools/testing/selftests/rtc/Makefile                          | 2 +-
 tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
 tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
 tools/testing/selftests/sgx/Makefile                          | 2 +-
 tools/testing/selftests/sgx/sigstruct.c                       | 1 -
 tools/testing/selftests/tmpfs/Makefile                        | 2 +-
 tools/testing/selftests/user_events/abi_test.c                | 2 --
 tools/testing/selftests/x86/amx.c                             | 2 --
 tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
 tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
 tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
 tools/testing/selftests/x86/fsgsbase.c                        | 2 --
 tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
 tools/testing/selftests/x86/ioperm.c                          | 2 --
 tools/testing/selftests/x86/iopl.c                            | 2 --
 tools/testing/selftests/x86/lam.c                             | 1 -
 tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
 tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
 tools/testing/selftests/x86/nx_stack.c                        | 2 --
 tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
 tools/testing/selftests/x86/sigaltstack.c                     | 2 --
 tools/testing/selftests/x86/sigreturn.c                       | 3 ---
 tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
 tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
 tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
 tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
 tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
 tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
 tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
 tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
 tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
 tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
 tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
 tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
 tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
 tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
 218 files changed, 20 insertions(+), 426 deletions(-)

--
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
asprintf into kselftest_harness.h, which is a GNU extension and needs
_GNU_SOURCE to either be defined prior to including headers or with the
-D_GNU_SOURCE flag passed to the compiler.

v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
location.  Remove #define _GNU_SOURCE from source code to resolve
redefinition warnings.

Edward Liaw (5):
  selftests: Compile kselftest headers with -D_GNU_SOURCE
  selftests/sgx: Include KHDR_INCLUDES in Makefile
  selftests: Include KHDR_INCLUDES in Makefile
  selftests: Drop define _GNU_SOURCE
  selftests: Drop duplicate -D_GNU_SOURCE

 tools/testing/selftests/Makefile                              | 4 ++--
 tools/testing/selftests/alsa/Makefile                         | 2 +-
 tools/testing/selftests/arm64/signal/Makefile                 | 2 +-
 tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
 tools/testing/selftests/capabilities/test_execve.c            | 2 --
 tools/testing/selftests/clone3/clone3.c                       | 2 --
 .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
 tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
 tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
 tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
 tools/testing/selftests/core/close_range_test.c               | 2 --
 tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
 tools/testing/selftests/exec/Makefile                         | 2 +-
 tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
 tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
 tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
 tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
 tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
 tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
 tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
 tools/testing/selftests/filesystems/overlayfs/Makefile        | 2 +-
 tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
 .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
 tools/testing/selftests/futex/functional/Makefile             | 2 +-
 tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
 tools/testing/selftests/hid/Makefile                          | 2 +-
 tools/testing/selftests/iommu/Makefile                        | 2 --
 tools/testing/selftests/ipc/msgque.c                          | 1 -
 tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
 tools/testing/selftests/kselftest_harness.h                   | 2 +-
 tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
 tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
 tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
 tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
 tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
 tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
 tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
 tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
 tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
 tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
 tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
 tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
 tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
 tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
 tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
 tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
 tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
 tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
 .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
 tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
 tools/testing/selftests/kvm/rseq_test.c                       | 1 -
 tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
 tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
 tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
 tools/testing/selftests/kvm/steal_time.c                      | 1 -
 tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
 tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
 .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
 tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
 .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
 tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
 tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
 tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
 tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
 tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
 .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
 tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
 tools/testing/selftests/landlock/base_test.c                  | 2 --
 tools/testing/selftests/landlock/fs_test.c                    | 2 --
 tools/testing/selftests/landlock/net_test.c                   | 2 --
 tools/testing/selftests/landlock/ptrace_test.c                | 2 --
 tools/testing/selftests/lib.mk                                | 2 +-
 tools/testing/selftests/lsm/common.c                          | 2 --
 tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
 tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
 tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
 tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
 .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
 .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
 tools/testing/selftests/memfd/common.c                        | 1 -
 tools/testing/selftests/memfd/fuse_test.c                     | 2 --
 tools/testing/selftests/memfd/memfd_test.c                    | 1 -
 tools/testing/selftests/mm/cow.c                              | 1 -
 tools/testing/selftests/mm/gup_longterm.c                     | 1 -
 tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
 tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
 tools/testing/selftests/mm/khugepaged.c                       | 1 -
 tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
 tools/testing/selftests/mm/madv_populate.c                    | 1 -
 tools/testing/selftests/mm/map_populate.c                     | 2 --
 tools/testing/selftests/mm/mdwe_test.c                        | 1 -
 tools/testing/selftests/mm/memfd_secret.c                     | 2 --
 tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
 tools/testing/selftests/mm/mrelease_test.c                    | 1 -
 tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
 tools/testing/selftests/mm/mremap_test.c                      | 2 --
 tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
 tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
 tools/testing/selftests/mm/protection_keys.c                  | 1 -
 tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
 tools/testing/selftests/mm/thuge-gen.c                        | 2 --
 tools/testing/selftests/mm/uffd-common.h                      | 1 -
 tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
 .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
 tools/testing/selftests/nci/Makefile                          | 2 +-
 tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
 tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
 tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
 tools/testing/selftests/net/csum.c                            | 3 ---
 tools/testing/selftests/net/gro.c                             | 3 ---
 tools/testing/selftests/net/ip_defrag.c                       | 3 ---
 tools/testing/selftests/net/ipsec.c                           | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
 tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
 tools/testing/selftests/net/nettest.c                         | 2 --
 tools/testing/selftests/net/psock_fanout.c                    | 3 ---
 tools/testing/selftests/net/psock_snd.c                       | 3 ---
 tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
 tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
 tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
 tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
 tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
 tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
 tools/testing/selftests/net/so_txtime.c                       | 3 ---
 tools/testing/selftests/net/tap.c                             | 3 ---
 tools/testing/selftests/net/tcp_ao/Makefile                   | 2 +-
 tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
 tools/testing/selftests/net/tcp_inq.c                         | 2 --
 tools/testing/selftests/net/tcp_mmap.c                        | 1 -
 tools/testing/selftests/net/tls.c                             | 3 ---
 tools/testing/selftests/net/toeplitz.c                        | 3 ---
 tools/testing/selftests/net/tun.c                             | 3 ---
 tools/testing/selftests/net/txring_overwrite.c                | 3 ---
 tools/testing/selftests/net/txtimestamp.c                     | 3 ---
 tools/testing/selftests/net/udpgso.c                          | 3 ---
 tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
 tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
 tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
 tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
 tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
 tools/testing/selftests/pidfd/pidfd.h                         | 1 -
 tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
 tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
 tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
 tools/testing/selftests/prctl/Makefile                        | 2 ++
 tools/testing/selftests/proc/Makefile                         | 2 +-
 tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
 tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
 tools/testing/selftests/resctrl/Makefile                      | 2 +-
 tools/testing/selftests/riscv/mm/Makefile                     | 2 +-
 tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
 tools/testing/selftests/rseq/basic_test.c                     | 2 --
 tools/testing/selftests/rseq/param_test.c                     | 1 -
 tools/testing/selftests/rseq/rseq.c                           | 2 --
 tools/testing/selftests/rtc/Makefile                          | 2 +-
 tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
 tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
 tools/testing/selftests/sgx/Makefile                          | 2 +-
 tools/testing/selftests/sgx/sigstruct.c                       | 1 -
 tools/testing/selftests/tmpfs/Makefile                        | 2 +-
 tools/testing/selftests/user_events/abi_test.c                | 2 --
 tools/testing/selftests/x86/amx.c                             | 2 --
 tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
 tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
 tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
 tools/testing/selftests/x86/fsgsbase.c                        | 2 --
 tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
 tools/testing/selftests/x86/ioperm.c                          | 2 --
 tools/testing/selftests/x86/iopl.c                            | 2 --
 tools/testing/selftests/x86/lam.c                             | 1 -
 tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
 tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
 tools/testing/selftests/x86/nx_stack.c                        | 2 --
 tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
 tools/testing/selftests/x86/sigaltstack.c                     | 2 --
 tools/testing/selftests/x86/sigreturn.c                       | 3 ---
 tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
 tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
 tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
 tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
 tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
 tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
 tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
 tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
 tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
 tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
 tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
 tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
 tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
 tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
 218 files changed, 20 insertions(+), 426 deletions(-)

--
2.45.0.rc1.225.g2a3ae87e7f-goog


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[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
asprintf into kselftest_harness.h, which is a GNU extension and needs
_GNU_SOURCE to either be defined prior to including headers or with the
-D_GNU_SOURCE flag passed to the compiler.

v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
location.  Remove #define _GNU_SOURCE from source code to resolve
redefinition warnings.

Edward Liaw (5):
  selftests: Compile kselftest headers with -D_GNU_SOURCE
  selftests/sgx: Include KHDR_INCLUDES in Makefile
  selftests: Include KHDR_INCLUDES in Makefile
  selftests: Drop define _GNU_SOURCE
  selftests: Drop duplicate -D_GNU_SOURCE

 tools/testing/selftests/Makefile                              | 4 ++--
 tools/testing/selftests/alsa/Makefile                         | 2 +-
 tools/testing/selftests/arm64/signal/Makefile                 | 2 +-
 tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
 tools/testing/selftests/capabilities/test_execve.c            | 2 --
 tools/testing/selftests/clone3/clone3.c                       | 2 --
 .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
 tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
 tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
 tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
 tools/testing/selftests/core/close_range_test.c               | 2 --
 tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
 tools/testing/selftests/exec/Makefile                         | 2 +-
 tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
 tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
 tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
 tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
 tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
 tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
 tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
 tools/testing/selftests/filesystems/overlayfs/Makefile        | 2 +-
 tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
 .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
 tools/testing/selftests/futex/functional/Makefile             | 2 +-
 tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
 tools/testing/selftests/hid/Makefile                          | 2 +-
 tools/testing/selftests/iommu/Makefile                        | 2 --
 tools/testing/selftests/ipc/msgque.c                          | 1 -
 tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
 tools/testing/selftests/kselftest_harness.h                   | 2 +-
 tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
 tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
 tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
 tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
 tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
 tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
 tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
 tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
 tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
 tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
 tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
 tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
 tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
 tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
 tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
 tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
 tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
 tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
 .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
 tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
 tools/testing/selftests/kvm/rseq_test.c                       | 1 -
 tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
 tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
 tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
 tools/testing/selftests/kvm/steal_time.c                      | 1 -
 tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
 tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
 .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
 tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
 .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
 tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
 tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
 tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
 tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
 tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
 .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
 tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
 tools/testing/selftests/landlock/base_test.c                  | 2 --
 tools/testing/selftests/landlock/fs_test.c                    | 2 --
 tools/testing/selftests/landlock/net_test.c                   | 2 --
 tools/testing/selftests/landlock/ptrace_test.c                | 2 --
 tools/testing/selftests/lib.mk                                | 2 +-
 tools/testing/selftests/lsm/common.c                          | 2 --
 tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
 tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
 tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
 tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
 .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
 .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
 tools/testing/selftests/memfd/common.c                        | 1 -
 tools/testing/selftests/memfd/fuse_test.c                     | 2 --
 tools/testing/selftests/memfd/memfd_test.c                    | 1 -
 tools/testing/selftests/mm/cow.c                              | 1 -
 tools/testing/selftests/mm/gup_longterm.c                     | 1 -
 tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
 tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
 tools/testing/selftests/mm/khugepaged.c                       | 1 -
 tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
 tools/testing/selftests/mm/madv_populate.c                    | 1 -
 tools/testing/selftests/mm/map_populate.c                     | 2 --
 tools/testing/selftests/mm/mdwe_test.c                        | 1 -
 tools/testing/selftests/mm/memfd_secret.c                     | 2 --
 tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
 tools/testing/selftests/mm/mrelease_test.c                    | 1 -
 tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
 tools/testing/selftests/mm/mremap_test.c                      | 2 --
 tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
 tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
 tools/testing/selftests/mm/protection_keys.c                  | 1 -
 tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
 tools/testing/selftests/mm/thuge-gen.c                        | 2 --
 tools/testing/selftests/mm/uffd-common.h                      | 1 -
 tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
 .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
 tools/testing/selftests/nci/Makefile                          | 2 +-
 tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
 tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
 tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
 tools/testing/selftests/net/csum.c                            | 3 ---
 tools/testing/selftests/net/gro.c                             | 3 ---
 tools/testing/selftests/net/ip_defrag.c                       | 3 ---
 tools/testing/selftests/net/ipsec.c                           | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
 tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
 tools/testing/selftests/net/nettest.c                         | 2 --
 tools/testing/selftests/net/psock_fanout.c                    | 3 ---
 tools/testing/selftests/net/psock_snd.c                       | 3 ---
 tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
 tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
 tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
 tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
 tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
 tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
 tools/testing/selftests/net/so_txtime.c                       | 3 ---
 tools/testing/selftests/net/tap.c                             | 3 ---
 tools/testing/selftests/net/tcp_ao/Makefile                   | 2 +-
 tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
 tools/testing/selftests/net/tcp_inq.c                         | 2 --
 tools/testing/selftests/net/tcp_mmap.c                        | 1 -
 tools/testing/selftests/net/tls.c                             | 3 ---
 tools/testing/selftests/net/toeplitz.c                        | 3 ---
 tools/testing/selftests/net/tun.c                             | 3 ---
 tools/testing/selftests/net/txring_overwrite.c                | 3 ---
 tools/testing/selftests/net/txtimestamp.c                     | 3 ---
 tools/testing/selftests/net/udpgso.c                          | 3 ---
 tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
 tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
 tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
 tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
 tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
 tools/testing/selftests/pidfd/pidfd.h                         | 1 -
 tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
 tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
 tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
 tools/testing/selftests/prctl/Makefile                        | 2 ++
 tools/testing/selftests/proc/Makefile                         | 2 +-
 tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
 tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
 tools/testing/selftests/resctrl/Makefile                      | 2 +-
 tools/testing/selftests/riscv/mm/Makefile                     | 2 +-
 tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
 tools/testing/selftests/rseq/basic_test.c                     | 2 --
 tools/testing/selftests/rseq/param_test.c                     | 1 -
 tools/testing/selftests/rseq/rseq.c                           | 2 --
 tools/testing/selftests/rtc/Makefile                          | 2 +-
 tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
 tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
 tools/testing/selftests/sgx/Makefile                          | 2 +-
 tools/testing/selftests/sgx/sigstruct.c                       | 1 -
 tools/testing/selftests/tmpfs/Makefile                        | 2 +-
 tools/testing/selftests/user_events/abi_test.c                | 2 --
 tools/testing/selftests/x86/amx.c                             | 2 --
 tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
 tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
 tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
 tools/testing/selftests/x86/fsgsbase.c                        | 2 --
 tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
 tools/testing/selftests/x86/ioperm.c                          | 2 --
 tools/testing/selftests/x86/iopl.c                            | 2 --
 tools/testing/selftests/x86/lam.c                             | 1 -
 tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
 tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
 tools/testing/selftests/x86/nx_stack.c                        | 2 --
 tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
 tools/testing/selftests/x86/sigaltstack.c                     | 2 --
 tools/testing/selftests/x86/sigreturn.c                       | 3 ---
 tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
 tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
 tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
 tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
 tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
 tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
 tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
 tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
 tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
 tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
 tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
 tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
 tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
 tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
 218 files changed, 20 insertions(+), 426 deletions(-)

--
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Edward Liaw]

Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
central location.

809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
asprintf into kselftest_harness.h, which is a GNU extension and needs
_GNU_SOURCE to either be defined prior to including headers or with the
-D_GNU_SOURCE flag passed to the compiler.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/Makefile            | 4 ++--
 tools/testing/selftests/kselftest_harness.h | 2 +-
 tools/testing/selftests/lib.mk              | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..ed012a7f0786 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
   # $(realpath ...) resolves symlinks
   abs_objtree := $(realpath $(abs_objtree))
   BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
 else
   BUILD := $(CURDIR)
   abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
   DEFAULT_INSTALL_HDR_PATH := 1
 endif
 
diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index d98702b6955d..b2a1b6343896 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -51,7 +51,7 @@
 #define __KSELFTEST_HARNESS_H
 
 #ifndef _GNU_SOURCE
-#define _GNU_SOURCE
+static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
 #endif
 #include <asm/types.h>
 #include <ctype.h>
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index da2cade3bab0..2503dc732b4d 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
 top_srcdir = $(selfdir)/../../..
 
 ifeq ($(KHDR_INCLUDES),)
-KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
+KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
 endif
 
 # The following are built by lib.mk common compile rules.
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Edward Liaw]

Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
central location.

809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
asprintf into kselftest_harness.h, which is a GNU extension and needs
_GNU_SOURCE to either be defined prior to including headers or with the
-D_GNU_SOURCE flag passed to the compiler.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/Makefile            | 4 ++--
 tools/testing/selftests/kselftest_harness.h | 2 +-
 tools/testing/selftests/lib.mk              | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..ed012a7f0786 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
   # $(realpath ...) resolves symlinks
   abs_objtree := $(realpath $(abs_objtree))
   BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
 else
   BUILD := $(CURDIR)
   abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
   DEFAULT_INSTALL_HDR_PATH := 1
 endif
 
diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index d98702b6955d..b2a1b6343896 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -51,7 +51,7 @@
 #define __KSELFTEST_HARNESS_H
 
 #ifndef _GNU_SOURCE
-#define _GNU_SOURCE
+static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
 #endif
 #include <asm/types.h>
 #include <ctype.h>
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index da2cade3bab0..2503dc732b4d 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
 top_srcdir = $(selfdir)/../../..
 
 ifeq ($(KHDR_INCLUDES),)
-KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
+KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
 endif
 
 # The following are built by lib.mk common compile rules.
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Edward Liaw]

Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
central location.

809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
asprintf into kselftest_harness.h, which is a GNU extension and needs
_GNU_SOURCE to either be defined prior to including headers or with the
-D_GNU_SOURCE flag passed to the compiler.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang at intel.com
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/Makefile            | 4 ++--
 tools/testing/selftests/kselftest_harness.h | 2 +-
 tools/testing/selftests/lib.mk              | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..ed012a7f0786 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
   # $(realpath ...) resolves symlinks
   abs_objtree := $(realpath $(abs_objtree))
   BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
 else
   BUILD := $(CURDIR)
   abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
   DEFAULT_INSTALL_HDR_PATH := 1
 endif
 
diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index d98702b6955d..b2a1b6343896 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -51,7 +51,7 @@
 #define __KSELFTEST_HARNESS_H
 
 #ifndef _GNU_SOURCE
-#define _GNU_SOURCE
+static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
 #endif
 #include <asm/types.h>
 #include <ctype.h>
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index da2cade3bab0..2503dc732b4d 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
 top_srcdir = $(selfdir)/../../..
 
 ifeq ($(KHDR_INCLUDES),)
-KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
+KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
 endif
 
 # The following are built by lib.mk common compile rules.
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

Re: [PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Muhammad Usama Anjum]

Thanks for patches

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/Makefile            | 4 ++--
>  tools/testing/selftests/kselftest_harness.h | 2 +-
>  tools/testing/selftests/lib.mk              | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index e1504833654d..ed012a7f0786 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
>    # $(realpath ...) resolves symlinks
>    abs_objtree := $(realpath $(abs_objtree))
>    BUILD := $(abs_objtree)/kselftest
> -  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
>  else
>    BUILD := $(CURDIR)
>    abs_srctree := $(shell cd $(top_srcdir) && pwd)
> -  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
>    DEFAULT_INSTALL_HDR_PATH := 1
>  endif
>  
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index d98702b6955d..b2a1b6343896 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -51,7 +51,7 @@
>  #define __KSELFTEST_HARNESS_H
>  
>  #ifndef _GNU_SOURCE
> -#define _GNU_SOURCE
> +static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
>  #endif
>  #include <asm/types.h>
>  #include <ctype.h>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index da2cade3bab0..2503dc732b4d 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
>  top_srcdir = $(selfdir)/../../..
>  
>  ifeq ($(KHDR_INCLUDES),)
> -KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
> +KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
>  endif
>  
>  # The following are built by lib.mk common compile rules.

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Muhammad Usama Anjum]

Thanks for patches

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/Makefile            | 4 ++--
>  tools/testing/selftests/kselftest_harness.h | 2 +-
>  tools/testing/selftests/lib.mk              | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index e1504833654d..ed012a7f0786 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
>    # $(realpath ...) resolves symlinks
>    abs_objtree := $(realpath $(abs_objtree))
>    BUILD := $(abs_objtree)/kselftest
> -  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
>  else
>    BUILD := $(CURDIR)
>    abs_srctree := $(shell cd $(top_srcdir) && pwd)
> -  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
>    DEFAULT_INSTALL_HDR_PATH := 1
>  endif
>  
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index d98702b6955d..b2a1b6343896 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -51,7 +51,7 @@
>  #define __KSELFTEST_HARNESS_H
>  
>  #ifndef _GNU_SOURCE
> -#define _GNU_SOURCE
> +static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
>  #endif
>  #include <asm/types.h>
>  #include <ctype.h>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index da2cade3bab0..2503dc732b4d 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
>  top_srcdir = $(selfdir)/../../..
>  
>  ifeq ($(KHDR_INCLUDES),)
> -KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
> +KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
>  endif
>  
>  # The following are built by lib.mk common compile rules.

-- 
BR,
Muhammad Usama Anjum

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
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[PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Muhammad Usama Anjum]

Thanks for patches

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang at intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/Makefile            | 4 ++--
>  tools/testing/selftests/kselftest_harness.h | 2 +-
>  tools/testing/selftests/lib.mk              | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index e1504833654d..ed012a7f0786 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
>    # $(realpath ...) resolves symlinks
>    abs_objtree := $(realpath $(abs_objtree))
>    BUILD := $(abs_objtree)/kselftest
> -  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
>  else
>    BUILD := $(CURDIR)
>    abs_srctree := $(shell cd $(top_srcdir) && pwd)
> -  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
>    DEFAULT_INSTALL_HDR_PATH := 1
>  endif
>  
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index d98702b6955d..b2a1b6343896 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -51,7 +51,7 @@
>  #define __KSELFTEST_HARNESS_H
>  
>  #ifndef _GNU_SOURCE
> -#define _GNU_SOURCE
> +static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
>  #endif
>  #include <asm/types.h>
>  #include <ctype.h>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index da2cade3bab0..2503dc732b4d 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
>  top_srcdir = $(selfdir)/../../..
>  
>  ifeq ($(KHDR_INCLUDES),)
> -KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
> +KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
>  endif
>  
>  # The following are built by lib.mk common compile rules.

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 670 bytes --]

On Tue, May 07, 2024 at 09:38:26PM +0000, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.

Reviewed-by: Mark Brown <broonie@kernel.org>

This does mean we define _GNU_SOURCE for nolibc (and I guess any other
libc people use like bionic) but hopefully nobody's using the same
define with a different meaning so should be fine.

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Re: [PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 670 bytes --]

On Tue, May 07, 2024 at 09:38:26PM +0000, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.

Reviewed-by: Mark Brown <broonie@kernel.org>

This does mean we define _GNU_SOURCE for nolibc (and I guess any other
libc people use like bionic) but hopefully nobody's using the same
define with a different meaning so should be fine.

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[-- Attachment #2: Type: text/plain, Size: 161 bytes --]

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http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[Mark Brown]

On Tue, May 07, 2024 at 09:38:26PM +0000, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.

Reviewed-by: Mark Brown <broonie@kernel.org>

This does mean we define _GNU_SOURCE for nolibc (and I guess any other
libc people use like bionic) but hopefully nobody's using the same
define with a different meaning so should be fine.
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Re: [PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/Makefile            | 4 ++--
>   tools/testing/selftests/kselftest_harness.h | 2 +-
>   tools/testing/selftests/lib.mk              | 2 +-
>   3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index e1504833654d..ed012a7f0786 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
>     # $(realpath ...) resolves symlinks
>     abs_objtree := $(realpath $(abs_objtree))
>     BUILD := $(abs_objtree)/kselftest
> -  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
>   else
>     BUILD := $(CURDIR)
>     abs_srctree := $(shell cd $(top_srcdir) && pwd)
> -  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
>     DEFAULT_INSTALL_HDR_PATH := 1
>   endif

Just a small copy-paste duplication request: can we maybe do it this
way, instead, to remove the duplication? It's small *so far*, but
still. :)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..13a5b11db59a 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -152,6 +152,8 @@ ifeq ("$(origin O)", "command line")
    KBUILD_OUTPUT := $(O)
  endif
  
+KHDR_INCLUDES := -D_GNU_SOURCE
+
  ifneq ($(KBUILD_OUTPUT),)
    # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
    # expand a shell special character '~'. We use a somewhat tedious way here.
@@ -161,11 +163,11 @@ ifneq ($(KBUILD_OUTPUT),)
    # $(realpath ...) resolves symlinks
    abs_objtree := $(realpath $(abs_objtree))
    BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES += -isystem ${abs_objtree}/usr/include
  else
    BUILD := $(CURDIR)
    abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES += -isystem ${abs_srctree}/usr/include
    DEFAULT_INSTALL_HDR_PATH := 1
  endif


>   
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index d98702b6955d..b2a1b6343896 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -51,7 +51,7 @@
>   #define __KSELFTEST_HARNESS_H
>   
>   #ifndef _GNU_SOURCE
> -#define _GNU_SOURCE
> +static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
>   #endif
>   #include <asm/types.h>
>   #include <ctype.h>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index da2cade3bab0..2503dc732b4d 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
>   top_srcdir = $(selfdir)/../../..
>   
>   ifeq ($(KHDR_INCLUDES),)
> -KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
> +KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
>   endif
>   
>   # The following are built by lib.mk common compile rules.

The rest looks good. And whether you accept my recommendation above,
or not, either way this patch looks good, so please feel free to add:

Reviewed-by: John Hubbard <jhubbard@nvidia.com>


thanks,
-- 
John Hubbard
NVIDIA

Re: [PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/Makefile            | 4 ++--
>   tools/testing/selftests/kselftest_harness.h | 2 +-
>   tools/testing/selftests/lib.mk              | 2 +-
>   3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index e1504833654d..ed012a7f0786 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
>     # $(realpath ...) resolves symlinks
>     abs_objtree := $(realpath $(abs_objtree))
>     BUILD := $(abs_objtree)/kselftest
> -  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
>   else
>     BUILD := $(CURDIR)
>     abs_srctree := $(shell cd $(top_srcdir) && pwd)
> -  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
>     DEFAULT_INSTALL_HDR_PATH := 1
>   endif

Just a small copy-paste duplication request: can we maybe do it this
way, instead, to remove the duplication? It's small *so far*, but
still. :)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..13a5b11db59a 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -152,6 +152,8 @@ ifeq ("$(origin O)", "command line")
    KBUILD_OUTPUT := $(O)
  endif
  
+KHDR_INCLUDES := -D_GNU_SOURCE
+
  ifneq ($(KBUILD_OUTPUT),)
    # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
    # expand a shell special character '~'. We use a somewhat tedious way here.
@@ -161,11 +163,11 @@ ifneq ($(KBUILD_OUTPUT),)
    # $(realpath ...) resolves symlinks
    abs_objtree := $(realpath $(abs_objtree))
    BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES += -isystem ${abs_objtree}/usr/include
  else
    BUILD := $(CURDIR)
    abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES += -isystem ${abs_srctree}/usr/include
    DEFAULT_INSTALL_HDR_PATH := 1
  endif


>   
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index d98702b6955d..b2a1b6343896 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -51,7 +51,7 @@
>   #define __KSELFTEST_HARNESS_H
>   
>   #ifndef _GNU_SOURCE
> -#define _GNU_SOURCE
> +static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
>   #endif
>   #include <asm/types.h>
>   #include <ctype.h>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index da2cade3bab0..2503dc732b4d 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
>   top_srcdir = $(selfdir)/../../..
>   
>   ifeq ($(KHDR_INCLUDES),)
> -KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
> +KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
>   endif
>   
>   # The following are built by lib.mk common compile rules.

The rest looks good. And whether you accept my recommendation above,
or not, either way this patch looks good, so please feel free to add:

Reviewed-by: John Hubbard <jhubbard@nvidia.com>


thanks,
-- 
John Hubbard
NVIDIA


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 1/5] selftests: Compile kselftest headers with -D_GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang at intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/Makefile            | 4 ++--
>   tools/testing/selftests/kselftest_harness.h | 2 +-
>   tools/testing/selftests/lib.mk              | 2 +-
>   3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index e1504833654d..ed012a7f0786 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
>     # $(realpath ...) resolves symlinks
>     abs_objtree := $(realpath $(abs_objtree))
>     BUILD := $(abs_objtree)/kselftest
> -  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
>   else
>     BUILD := $(CURDIR)
>     abs_srctree := $(shell cd $(top_srcdir) && pwd)
> -  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
> +  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
>     DEFAULT_INSTALL_HDR_PATH := 1
>   endif

Just a small copy-paste duplication request: can we maybe do it this
way, instead, to remove the duplication? It's small *so far*, but
still. :)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..13a5b11db59a 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -152,6 +152,8 @@ ifeq ("$(origin O)", "command line")
    KBUILD_OUTPUT := $(O)
  endif
  
+KHDR_INCLUDES := -D_GNU_SOURCE
+
  ifneq ($(KBUILD_OUTPUT),)
    # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
    # expand a shell special character '~'. We use a somewhat tedious way here.
@@ -161,11 +163,11 @@ ifneq ($(KBUILD_OUTPUT),)
    # $(realpath ...) resolves symlinks
    abs_objtree := $(realpath $(abs_objtree))
    BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES += -isystem ${abs_objtree}/usr/include
  else
    BUILD := $(CURDIR)
    abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES += -isystem ${abs_srctree}/usr/include
    DEFAULT_INSTALL_HDR_PATH := 1
  endif


>   
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index d98702b6955d..b2a1b6343896 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -51,7 +51,7 @@
>   #define __KSELFTEST_HARNESS_H
>   
>   #ifndef _GNU_SOURCE
> -#define _GNU_SOURCE
> +static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
>   #endif
>   #include <asm/types.h>
>   #include <ctype.h>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index da2cade3bab0..2503dc732b4d 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -45,7 +45,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
>   top_srcdir = $(selfdir)/../../..
>   
>   ifeq ($(KHDR_INCLUDES),)
> -KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
> +KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
>   endif
>   
>   # The following are built by lib.mk common compile rules.

The rest looks good. And whether you accept my recommendation above,
or not, either way this patch looks good, so please feel free to add:

Reviewed-by: John Hubbard <jhubbard@nvidia.com>


thanks,
-- 
John Hubbard
NVIDIA

[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
dependencies (-D_GNU_SOURCE).

Also, remove redefinitions of _GNU_SOURCE in the source code.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/sgx/Makefile    | 2 +-
 tools/testing/selftests/sgx/sigstruct.c | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
index 867f88ce2570..26ea30fae23c 100644
--- a/tools/testing/selftests/sgx/Makefile
+++ b/tools/testing/selftests/sgx/Makefile
@@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
 endif
 
 INCLUDES := -I$(top_srcdir)/tools/include
-HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
+HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
 HOST_LDFLAGS := -z noexecstack -lcrypto
 ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
 	       -fno-stack-protector -mrdrnd $(INCLUDES)
diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
index d73b29becf5b..200034a0fee5 100644
--- a/tools/testing/selftests/sgx/sigstruct.c
+++ b/tools/testing/selftests/sgx/sigstruct.c
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*  Copyright(c) 2016-20 Intel Corporation. */
 
-#define _GNU_SOURCE
 #include <assert.h>
 #include <getopt.h>
 #include <stdbool.h>
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
dependencies (-D_GNU_SOURCE).

Also, remove redefinitions of _GNU_SOURCE in the source code.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/sgx/Makefile    | 2 +-
 tools/testing/selftests/sgx/sigstruct.c | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
index 867f88ce2570..26ea30fae23c 100644
--- a/tools/testing/selftests/sgx/Makefile
+++ b/tools/testing/selftests/sgx/Makefile
@@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
 endif
 
 INCLUDES := -I$(top_srcdir)/tools/include
-HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
+HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
 HOST_LDFLAGS := -z noexecstack -lcrypto
 ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
 	       -fno-stack-protector -mrdrnd $(INCLUDES)
diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
index d73b29becf5b..200034a0fee5 100644
--- a/tools/testing/selftests/sgx/sigstruct.c
+++ b/tools/testing/selftests/sgx/sigstruct.c
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*  Copyright(c) 2016-20 Intel Corporation. */
 
-#define _GNU_SOURCE
 #include <assert.h>
 #include <getopt.h>
 #include <stdbool.h>
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
dependencies (-D_GNU_SOURCE).

Also, remove redefinitions of _GNU_SOURCE in the source code.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang at intel.com
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/sgx/Makefile    | 2 +-
 tools/testing/selftests/sgx/sigstruct.c | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
index 867f88ce2570..26ea30fae23c 100644
--- a/tools/testing/selftests/sgx/Makefile
+++ b/tools/testing/selftests/sgx/Makefile
@@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
 endif
 
 INCLUDES := -I$(top_srcdir)/tools/include
-HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
+HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
 HOST_LDFLAGS := -z noexecstack -lcrypto
 ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
 	       -fno-stack-protector -mrdrnd $(INCLUDES)
diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
index d73b29becf5b..200034a0fee5 100644
--- a/tools/testing/selftests/sgx/sigstruct.c
+++ b/tools/testing/selftests/sgx/sigstruct.c
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*  Copyright(c) 2016-20 Intel Corporation. */
 
-#define _GNU_SOURCE
 #include <assert.h>
 #include <getopt.h>
 #include <stdbool.h>
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/sgx/Makefile    | 2 +-
>  tools/testing/selftests/sgx/sigstruct.c | 1 -
>  2 files changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
> index 867f88ce2570..26ea30fae23c 100644
> --- a/tools/testing/selftests/sgx/Makefile
> +++ b/tools/testing/selftests/sgx/Makefile
> @@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
>  endif
>  
>  INCLUDES := -I$(top_srcdir)/tools/include
> -HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
> +HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
>  HOST_LDFLAGS := -z noexecstack -lcrypto
>  ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
>  	       -fno-stack-protector -mrdrnd $(INCLUDES)
> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
> index d73b29becf5b..200034a0fee5 100644
> --- a/tools/testing/selftests/sgx/sigstruct.c
> +++ b/tools/testing/selftests/sgx/sigstruct.c
> @@ -1,7 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /*  Copyright(c) 2016-20 Intel Corporation. */
>  
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <getopt.h>
>  #include <stdbool.h>

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/sgx/Makefile    | 2 +-
>  tools/testing/selftests/sgx/sigstruct.c | 1 -
>  2 files changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
> index 867f88ce2570..26ea30fae23c 100644
> --- a/tools/testing/selftests/sgx/Makefile
> +++ b/tools/testing/selftests/sgx/Makefile
> @@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
>  endif
>  
>  INCLUDES := -I$(top_srcdir)/tools/include
> -HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
> +HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
>  HOST_LDFLAGS := -z noexecstack -lcrypto
>  ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
>  	       -fno-stack-protector -mrdrnd $(INCLUDES)
> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
> index d73b29becf5b..200034a0fee5 100644
> --- a/tools/testing/selftests/sgx/sigstruct.c
> +++ b/tools/testing/selftests/sgx/sigstruct.c
> @@ -1,7 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /*  Copyright(c) 2016-20 Intel Corporation. */
>  
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <getopt.h>
>  #include <stdbool.h>

-- 
BR,
Muhammad Usama Anjum

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[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang at intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/sgx/Makefile    | 2 +-
>  tools/testing/selftests/sgx/sigstruct.c | 1 -
>  2 files changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
> index 867f88ce2570..26ea30fae23c 100644
> --- a/tools/testing/selftests/sgx/Makefile
> +++ b/tools/testing/selftests/sgx/Makefile
> @@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
>  endif
>  
>  INCLUDES := -I$(top_srcdir)/tools/include
> -HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
> +HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
>  HOST_LDFLAGS := -z noexecstack -lcrypto
>  ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
>  	       -fno-stack-protector -mrdrnd $(INCLUDES)
> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
> index d73b29becf5b..200034a0fee5 100644
> --- a/tools/testing/selftests/sgx/sigstruct.c
> +++ b/tools/testing/selftests/sgx/sigstruct.c
> @@ -1,7 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /*  Copyright(c) 2016-20 Intel Corporation. */
>  
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <getopt.h>
>  #include <stdbool.h>

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Dave Hansen]

On 5/7/24 14:38, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.

From an x86 and SGX perspective, looks fine.  I assume Shuah is planning
on taking this pile.

Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Dave Hansen]

On 5/7/24 14:38, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.

From an x86 and SGX perspective, looks fine.  I assume Shuah is planning
on taking this pile.

Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

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[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Dave Hansen]

On 5/7/24 14:38, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.

From an x86 and SGX perspective, looks fine.  I assume Shuah is planning
on taking this pile.

Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Jarkko Sakkinen]

On Wed May 8, 2024 at 6:33 PM EEST, Dave Hansen wrote:
> On 5/7/24 14:38, Edward Liaw wrote:
> > Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> > dependencies (-D_GNU_SOURCE).
> > 
> > Also, remove redefinitions of _GNU_SOURCE in the source code.
>
> From an x86 and SGX perspective, looks fine.  I assume Shuah is planning
> on taking this pile.
>
> Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

Yep,

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

I also quickly tested with NUC7 for what it is worth:

Tested-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Jarkko Sakkinen]

On Wed May 8, 2024 at 6:33 PM EEST, Dave Hansen wrote:
> On 5/7/24 14:38, Edward Liaw wrote:
> > Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> > dependencies (-D_GNU_SOURCE).
> > 
> > Also, remove redefinitions of _GNU_SOURCE in the source code.
>
> From an x86 and SGX perspective, looks fine.  I assume Shuah is planning
> on taking this pile.
>
> Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

Yep,

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

I also quickly tested with NUC7 for what it is worth:

Tested-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

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[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[Jarkko Sakkinen]

On Wed May 8, 2024 at 6:33 PM EEST, Dave Hansen wrote:
> On 5/7/24 14:38, Edward Liaw wrote:
> > Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> > dependencies (-D_GNU_SOURCE).
> > 
> > Also, remove redefinitions of _GNU_SOURCE in the source code.
>
> From an x86 and SGX perspective, looks fine.  I assume Shuah is planning
> on taking this pile.
>
> Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

Yep,

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

I also quickly tested with NUC7 for what it is worth:

Tested-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/sgx/Makefile    | 2 +-
>   tools/testing/selftests/sgx/sigstruct.c | 1 -
>   2 files changed, 1 insertion(+), 2 deletions(-)

Looks good, and also still works with a clang/LLVM build (that is,
with the whole series applied.

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
> index 867f88ce2570..26ea30fae23c 100644
> --- a/tools/testing/selftests/sgx/Makefile
> +++ b/tools/testing/selftests/sgx/Makefile
> @@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
>   endif
>   
>   INCLUDES := -I$(top_srcdir)/tools/include
> -HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
> +HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
>   HOST_LDFLAGS := -z noexecstack -lcrypto
>   ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
>   	       -fno-stack-protector -mrdrnd $(INCLUDES)
> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
> index d73b29becf5b..200034a0fee5 100644
> --- a/tools/testing/selftests/sgx/sigstruct.c
> +++ b/tools/testing/selftests/sgx/sigstruct.c
> @@ -1,7 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /*  Copyright(c) 2016-20 Intel Corporation. */
>   
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <getopt.h>
>   #include <stdbool.h>

Re: [PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang@intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/sgx/Makefile    | 2 +-
>   tools/testing/selftests/sgx/sigstruct.c | 1 -
>   2 files changed, 1 insertion(+), 2 deletions(-)

Looks good, and also still works with a clang/LLVM build (that is,
with the whole series applied.

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
> index 867f88ce2570..26ea30fae23c 100644
> --- a/tools/testing/selftests/sgx/Makefile
> +++ b/tools/testing/selftests/sgx/Makefile
> @@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
>   endif
>   
>   INCLUDES := -I$(top_srcdir)/tools/include
> -HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
> +HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
>   HOST_LDFLAGS := -z noexecstack -lcrypto
>   ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
>   	       -fno-stack-protector -mrdrnd $(INCLUDES)
> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
> index d73b29becf5b..200034a0fee5 100644
> --- a/tools/testing/selftests/sgx/sigstruct.c
> +++ b/tools/testing/selftests/sgx/sigstruct.c
> @@ -1,7 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /*  Copyright(c) 2016-20 Intel Corporation. */
>   
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <getopt.h>
>   #include <stdbool.h>



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[PATCH v2 2/5] selftests/sgx: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add KHDR_INCLUDES to the CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Also, remove redefinitions of _GNU_SOURCE in the source code.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202404301040.3bea5782-oliver.sang at intel.com
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/sgx/Makefile    | 2 +-
>   tools/testing/selftests/sgx/sigstruct.c | 1 -
>   2 files changed, 1 insertion(+), 2 deletions(-)

Looks good, and also still works with a clang/LLVM build (that is,
with the whole series applied.

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
> index 867f88ce2570..26ea30fae23c 100644
> --- a/tools/testing/selftests/sgx/Makefile
> +++ b/tools/testing/selftests/sgx/Makefile
> @@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
>   endif
>   
>   INCLUDES := -I$(top_srcdir)/tools/include
> -HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
> +HOST_CFLAGS := -Wall -Werror $(KHDR_INCLUDES) -g $(INCLUDES) -fPIC
>   HOST_LDFLAGS := -z noexecstack -lcrypto
>   ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
>   	       -fno-stack-protector -mrdrnd $(INCLUDES)
> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
> index d73b29becf5b..200034a0fee5 100644
> --- a/tools/testing/selftests/sgx/sigstruct.c
> +++ b/tools/testing/selftests/sgx/sigstruct.c
> @@ -1,7 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /*  Copyright(c) 2016-20 Intel Corporation. */
>   
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <getopt.h>
>   #include <stdbool.h>

[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
dependencies (-D_GNU_SOURCE).

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/alsa/Makefile                  | 2 +-
 tools/testing/selftests/arm64/signal/Makefile          | 2 +-
 tools/testing/selftests/exec/Makefile                  | 2 +-
 tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
 tools/testing/selftests/hid/Makefile                   | 2 +-
 tools/testing/selftests/nci/Makefile                   | 2 +-
 tools/testing/selftests/prctl/Makefile                 | 2 ++
 tools/testing/selftests/proc/Makefile                  | 2 +-
 tools/testing/selftests/riscv/mm/Makefile              | 2 +-
 tools/testing/selftests/rtc/Makefile                   | 2 +-
 tools/testing/selftests/tmpfs/Makefile                 | 2 +-
 11 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
index 5af9ba8a4645..9a0ef194522c 100644
--- a/tools/testing/selftests/alsa/Makefile
+++ b/tools/testing/selftests/alsa/Makefile
@@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
 ifeq ($(LDLIBS),)
 LDLIBS += -lasound
 endif
-CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
+CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
 
 LDLIBS+=-lpthread
 
diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
index 8f5febaf1a9a..ae682ade615d 100644
--- a/tools/testing/selftests/arm64/signal/Makefile
+++ b/tools/testing/selftests/arm64/signal/Makefile
@@ -2,7 +2,7 @@
 # Copyright (C) 2019 ARM Limited
 
 # Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
 
 SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
 PROGS := $(patsubst %.c,%,$(SRCS))
diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
index fb4472ddffd8..15e78ec7c55e 100644
--- a/tools/testing/selftests/exec/Makefile
+++ b/tools/testing/selftests/exec/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 CFLAGS = -Wall
 CFLAGS += -Wno-nonnull
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 
 TEST_PROGS := binfmt_script.py
 TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
index 56b2b48a765b..6c29c963c7a8 100644
--- a/tools/testing/selftests/filesystems/overlayfs/Makefile
+++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
@@ -2,6 +2,6 @@
 
 TEST_GEN_PROGS := dev_in_maps
 
-CFLAGS := -Wall -Werror
+CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
 
 include ../../lib.mk
diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
index 2b5ea18bde38..0661b34488ef 100644
--- a/tools/testing/selftests/hid/Makefile
+++ b/tools/testing/selftests/hid/Makefile
@@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
 
 HOSTPKG_CONFIG := pkg-config
 
-CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
+CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
 CFLAGS += -I$(OUTPUT)/tools/include
 
 LDLIBS += -lelf -lz -lrt -lpthread
diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
index 47669a1d6a59..bbc5b8ec3b17 100644
--- a/tools/testing/selftests/nci/Makefile
+++ b/tools/testing/selftests/nci/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -Wl,-no-as-needed -Wall
+CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
 LDFLAGS += -lpthread
 
 TEST_GEN_PROGS := nci_dev
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
index 01dc90fbb509..1a0aefec9d6f 100644
--- a/tools/testing/selftests/prctl/Makefile
+++ b/tools/testing/selftests/prctl/Makefile
@@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
 ifeq ($(ARCH),x86)
 TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
 		disable-tsc-test set-anon-vma-name-test set-process-name
+
+CFLAGS += $(KHDR_INCLUDES)
 all: $(TEST_PROGS)
 
 include ../lib.mk
diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
index cd95369254c0..9596014c10a0 100644
--- a/tools/testing/selftests/proc/Makefile
+++ b/tools/testing/selftests/proc/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2 -Wno-unused-function
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 LDFLAGS += -pthread
 
 TEST_GEN_PROGS :=
diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
index c333263f2b27..715a21241113 100644
--- a/tools/testing/selftests/riscv/mm/Makefile
+++ b/tools/testing/selftests/riscv/mm/Makefile
@@ -3,7 +3,7 @@
 # Originally tools/testing/arm64/abi/Makefile
 
 # Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
 
 TEST_GEN_FILES := mmap_default mmap_bottomup
 
diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
index 55198ecc04db..654f9d58da3c 100644
--- a/tools/testing/selftests/rtc/Makefile
+++ b/tools/testing/selftests/rtc/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -O3 -Wl,-no-as-needed -Wall
+CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
 LDLIBS += -lrt -lpthread -lm
 
 TEST_GEN_PROGS = rtctest
diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
index aa11ccc92e5b..bcdc1bb6d2e6 100644
--- a/tools/testing/selftests/tmpfs/Makefile
+++ b/tools/testing/selftests/tmpfs/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS :=
 TEST_GEN_PROGS += bug-link-o-tmpfile
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
dependencies (-D_GNU_SOURCE).

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/alsa/Makefile                  | 2 +-
 tools/testing/selftests/arm64/signal/Makefile          | 2 +-
 tools/testing/selftests/exec/Makefile                  | 2 +-
 tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
 tools/testing/selftests/hid/Makefile                   | 2 +-
 tools/testing/selftests/nci/Makefile                   | 2 +-
 tools/testing/selftests/prctl/Makefile                 | 2 ++
 tools/testing/selftests/proc/Makefile                  | 2 +-
 tools/testing/selftests/riscv/mm/Makefile              | 2 +-
 tools/testing/selftests/rtc/Makefile                   | 2 +-
 tools/testing/selftests/tmpfs/Makefile                 | 2 +-
 11 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
index 5af9ba8a4645..9a0ef194522c 100644
--- a/tools/testing/selftests/alsa/Makefile
+++ b/tools/testing/selftests/alsa/Makefile
@@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
 ifeq ($(LDLIBS),)
 LDLIBS += -lasound
 endif
-CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
+CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
 
 LDLIBS+=-lpthread
 
diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
index 8f5febaf1a9a..ae682ade615d 100644
--- a/tools/testing/selftests/arm64/signal/Makefile
+++ b/tools/testing/selftests/arm64/signal/Makefile
@@ -2,7 +2,7 @@
 # Copyright (C) 2019 ARM Limited
 
 # Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
 
 SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
 PROGS := $(patsubst %.c,%,$(SRCS))
diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
index fb4472ddffd8..15e78ec7c55e 100644
--- a/tools/testing/selftests/exec/Makefile
+++ b/tools/testing/selftests/exec/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 CFLAGS = -Wall
 CFLAGS += -Wno-nonnull
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 
 TEST_PROGS := binfmt_script.py
 TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
index 56b2b48a765b..6c29c963c7a8 100644
--- a/tools/testing/selftests/filesystems/overlayfs/Makefile
+++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
@@ -2,6 +2,6 @@
 
 TEST_GEN_PROGS := dev_in_maps
 
-CFLAGS := -Wall -Werror
+CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
 
 include ../../lib.mk
diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
index 2b5ea18bde38..0661b34488ef 100644
--- a/tools/testing/selftests/hid/Makefile
+++ b/tools/testing/selftests/hid/Makefile
@@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
 
 HOSTPKG_CONFIG := pkg-config
 
-CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
+CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
 CFLAGS += -I$(OUTPUT)/tools/include
 
 LDLIBS += -lelf -lz -lrt -lpthread
diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
index 47669a1d6a59..bbc5b8ec3b17 100644
--- a/tools/testing/selftests/nci/Makefile
+++ b/tools/testing/selftests/nci/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -Wl,-no-as-needed -Wall
+CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
 LDFLAGS += -lpthread
 
 TEST_GEN_PROGS := nci_dev
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
index 01dc90fbb509..1a0aefec9d6f 100644
--- a/tools/testing/selftests/prctl/Makefile
+++ b/tools/testing/selftests/prctl/Makefile
@@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
 ifeq ($(ARCH),x86)
 TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
 		disable-tsc-test set-anon-vma-name-test set-process-name
+
+CFLAGS += $(KHDR_INCLUDES)
 all: $(TEST_PROGS)
 
 include ../lib.mk
diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
index cd95369254c0..9596014c10a0 100644
--- a/tools/testing/selftests/proc/Makefile
+++ b/tools/testing/selftests/proc/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2 -Wno-unused-function
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 LDFLAGS += -pthread
 
 TEST_GEN_PROGS :=
diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
index c333263f2b27..715a21241113 100644
--- a/tools/testing/selftests/riscv/mm/Makefile
+++ b/tools/testing/selftests/riscv/mm/Makefile
@@ -3,7 +3,7 @@
 # Originally tools/testing/arm64/abi/Makefile
 
 # Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
 
 TEST_GEN_FILES := mmap_default mmap_bottomup
 
diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
index 55198ecc04db..654f9d58da3c 100644
--- a/tools/testing/selftests/rtc/Makefile
+++ b/tools/testing/selftests/rtc/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -O3 -Wl,-no-as-needed -Wall
+CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
 LDLIBS += -lrt -lpthread -lm
 
 TEST_GEN_PROGS = rtctest
diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
index aa11ccc92e5b..bcdc1bb6d2e6 100644
--- a/tools/testing/selftests/tmpfs/Makefile
+++ b/tools/testing/selftests/tmpfs/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS :=
 TEST_GEN_PROGS += bug-link-o-tmpfile
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog


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linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
dependencies (-D_GNU_SOURCE).

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/alsa/Makefile                  | 2 +-
 tools/testing/selftests/arm64/signal/Makefile          | 2 +-
 tools/testing/selftests/exec/Makefile                  | 2 +-
 tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
 tools/testing/selftests/hid/Makefile                   | 2 +-
 tools/testing/selftests/nci/Makefile                   | 2 +-
 tools/testing/selftests/prctl/Makefile                 | 2 ++
 tools/testing/selftests/proc/Makefile                  | 2 +-
 tools/testing/selftests/riscv/mm/Makefile              | 2 +-
 tools/testing/selftests/rtc/Makefile                   | 2 +-
 tools/testing/selftests/tmpfs/Makefile                 | 2 +-
 11 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
index 5af9ba8a4645..9a0ef194522c 100644
--- a/tools/testing/selftests/alsa/Makefile
+++ b/tools/testing/selftests/alsa/Makefile
@@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
 ifeq ($(LDLIBS),)
 LDLIBS += -lasound
 endif
-CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
+CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
 
 LDLIBS+=-lpthread
 
diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
index 8f5febaf1a9a..ae682ade615d 100644
--- a/tools/testing/selftests/arm64/signal/Makefile
+++ b/tools/testing/selftests/arm64/signal/Makefile
@@ -2,7 +2,7 @@
 # Copyright (C) 2019 ARM Limited
 
 # Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
 
 SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
 PROGS := $(patsubst %.c,%,$(SRCS))
diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
index fb4472ddffd8..15e78ec7c55e 100644
--- a/tools/testing/selftests/exec/Makefile
+++ b/tools/testing/selftests/exec/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 CFLAGS = -Wall
 CFLAGS += -Wno-nonnull
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 
 TEST_PROGS := binfmt_script.py
 TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
index 56b2b48a765b..6c29c963c7a8 100644
--- a/tools/testing/selftests/filesystems/overlayfs/Makefile
+++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
@@ -2,6 +2,6 @@
 
 TEST_GEN_PROGS := dev_in_maps
 
-CFLAGS := -Wall -Werror
+CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
 
 include ../../lib.mk
diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
index 2b5ea18bde38..0661b34488ef 100644
--- a/tools/testing/selftests/hid/Makefile
+++ b/tools/testing/selftests/hid/Makefile
@@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
 
 HOSTPKG_CONFIG := pkg-config
 
-CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
+CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
 CFLAGS += -I$(OUTPUT)/tools/include
 
 LDLIBS += -lelf -lz -lrt -lpthread
diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
index 47669a1d6a59..bbc5b8ec3b17 100644
--- a/tools/testing/selftests/nci/Makefile
+++ b/tools/testing/selftests/nci/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -Wl,-no-as-needed -Wall
+CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
 LDFLAGS += -lpthread
 
 TEST_GEN_PROGS := nci_dev
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
index 01dc90fbb509..1a0aefec9d6f 100644
--- a/tools/testing/selftests/prctl/Makefile
+++ b/tools/testing/selftests/prctl/Makefile
@@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
 ifeq ($(ARCH),x86)
 TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
 		disable-tsc-test set-anon-vma-name-test set-process-name
+
+CFLAGS += $(KHDR_INCLUDES)
 all: $(TEST_PROGS)
 
 include ../lib.mk
diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
index cd95369254c0..9596014c10a0 100644
--- a/tools/testing/selftests/proc/Makefile
+++ b/tools/testing/selftests/proc/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2 -Wno-unused-function
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 LDFLAGS += -pthread
 
 TEST_GEN_PROGS :=
diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
index c333263f2b27..715a21241113 100644
--- a/tools/testing/selftests/riscv/mm/Makefile
+++ b/tools/testing/selftests/riscv/mm/Makefile
@@ -3,7 +3,7 @@
 # Originally tools/testing/arm64/abi/Makefile
 
 # Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
 
 TEST_GEN_FILES := mmap_default mmap_bottomup
 
diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
index 55198ecc04db..654f9d58da3c 100644
--- a/tools/testing/selftests/rtc/Makefile
+++ b/tools/testing/selftests/rtc/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -O3 -Wl,-no-as-needed -Wall
+CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
 LDLIBS += -lrt -lpthread -lm
 
 TEST_GEN_PROGS = rtctest
diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
index aa11ccc92e5b..bcdc1bb6d2e6 100644
--- a/tools/testing/selftests/tmpfs/Makefile
+++ b/tools/testing/selftests/tmpfs/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2
-CFLAGS += -D_GNU_SOURCE
+CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS :=
 TEST_GEN_PROGS += bug-link-o-tmpfile
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Jarkko Sakkinen]

On Wed May 8, 2024 at 12:38 AM EEST, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
>
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>

Oops, this is not for this patch but for SGX. Pressed D by mistake
in aerch, so for SGX one:

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Jarkko Sakkinen]

On Wed May 8, 2024 at 12:38 AM EEST, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
>
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>

Oops, this is not for this patch but for SGX. Pressed D by mistake
in aerch, so for SGX one:

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

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[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Jarkko Sakkinen]

On Wed May 8, 2024 at 12:38 AM EEST, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
>
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>

Oops, this is not for this patch but for SGX. Pressed D by mistake
in aerch, so for SGX one:

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/alsa/Makefile                  | 2 +-
>  tools/testing/selftests/arm64/signal/Makefile          | 2 +-
>  tools/testing/selftests/exec/Makefile                  | 2 +-
>  tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
>  tools/testing/selftests/hid/Makefile                   | 2 +-
>  tools/testing/selftests/nci/Makefile                   | 2 +-
>  tools/testing/selftests/prctl/Makefile                 | 2 ++
>  tools/testing/selftests/proc/Makefile                  | 2 +-
>  tools/testing/selftests/riscv/mm/Makefile              | 2 +-
>  tools/testing/selftests/rtc/Makefile                   | 2 +-
>  tools/testing/selftests/tmpfs/Makefile                 | 2 +-
>  11 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> index 5af9ba8a4645..9a0ef194522c 100644
> --- a/tools/testing/selftests/alsa/Makefile
> +++ b/tools/testing/selftests/alsa/Makefile
> @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
>  ifeq ($(LDLIBS),)
>  LDLIBS += -lasound
>  endif
> -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
>  
>  LDLIBS+=-lpthread
>  
> diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> index 8f5febaf1a9a..ae682ade615d 100644
> --- a/tools/testing/selftests/arm64/signal/Makefile
> +++ b/tools/testing/selftests/arm64/signal/Makefile
> @@ -2,7 +2,7 @@
>  # Copyright (C) 2019 ARM Limited
>  
>  # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>  
>  SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
>  PROGS := $(patsubst %.c,%,$(SRCS))
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index fb4472ddffd8..15e78ec7c55e 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  CFLAGS = -Wall
>  CFLAGS += -Wno-nonnull
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_PROGS := binfmt_script.py
>  TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> index 56b2b48a765b..6c29c963c7a8 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> @@ -2,6 +2,6 @@
>  
>  TEST_GEN_PROGS := dev_in_maps
>  
> -CFLAGS := -Wall -Werror
> +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
>  
>  include ../../lib.mk
> diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> index 2b5ea18bde38..0661b34488ef 100644
> --- a/tools/testing/selftests/hid/Makefile
> +++ b/tools/testing/selftests/hid/Makefile
> @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
>  
>  HOSTPKG_CONFIG := pkg-config
>  
> -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
>  CFLAGS += -I$(OUTPUT)/tools/include
>  
>  LDLIBS += -lelf -lz -lrt -lpthread
> diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> index 47669a1d6a59..bbc5b8ec3b17 100644
> --- a/tools/testing/selftests/nci/Makefile
> +++ b/tools/testing/selftests/nci/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>  LDFLAGS += -lpthread
>  
>  TEST_GEN_PROGS := nci_dev
> diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> index 01dc90fbb509..1a0aefec9d6f 100644
> --- a/tools/testing/selftests/prctl/Makefile
> +++ b/tools/testing/selftests/prctl/Makefile
> @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
>  ifeq ($(ARCH),x86)
>  TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
>  		disable-tsc-test set-anon-vma-name-test set-process-name
> +
> +CFLAGS += $(KHDR_INCLUDES)
>  all: $(TEST_PROGS)
>  
>  include ../lib.mk
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..9596014c10a0 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  CFLAGS += -Wall -O2 -Wno-unused-function
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  LDFLAGS += -pthread
>  
>  TEST_GEN_PROGS :=
> diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> index c333263f2b27..715a21241113 100644
> --- a/tools/testing/selftests/riscv/mm/Makefile
> +++ b/tools/testing/selftests/riscv/mm/Makefile
> @@ -3,7 +3,7 @@
>  # Originally tools/testing/arm64/abi/Makefile
>  
>  # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>  
>  TEST_GEN_FILES := mmap_default mmap_bottomup
>  
> diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> index 55198ecc04db..654f9d58da3c 100644
> --- a/tools/testing/selftests/rtc/Makefile
> +++ b/tools/testing/selftests/rtc/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>  LDLIBS += -lrt -lpthread -lm
>  
>  TEST_GEN_PROGS = rtctest
> diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> index aa11ccc92e5b..bcdc1bb6d2e6 100644
> --- a/tools/testing/selftests/tmpfs/Makefile
> +++ b/tools/testing/selftests/tmpfs/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  CFLAGS += -Wall -O2
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_GEN_PROGS :=
>  TEST_GEN_PROGS += bug-link-o-tmpfile

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/alsa/Makefile                  | 2 +-
>  tools/testing/selftests/arm64/signal/Makefile          | 2 +-
>  tools/testing/selftests/exec/Makefile                  | 2 +-
>  tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
>  tools/testing/selftests/hid/Makefile                   | 2 +-
>  tools/testing/selftests/nci/Makefile                   | 2 +-
>  tools/testing/selftests/prctl/Makefile                 | 2 ++
>  tools/testing/selftests/proc/Makefile                  | 2 +-
>  tools/testing/selftests/riscv/mm/Makefile              | 2 +-
>  tools/testing/selftests/rtc/Makefile                   | 2 +-
>  tools/testing/selftests/tmpfs/Makefile                 | 2 +-
>  11 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> index 5af9ba8a4645..9a0ef194522c 100644
> --- a/tools/testing/selftests/alsa/Makefile
> +++ b/tools/testing/selftests/alsa/Makefile
> @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
>  ifeq ($(LDLIBS),)
>  LDLIBS += -lasound
>  endif
> -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
>  
>  LDLIBS+=-lpthread
>  
> diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> index 8f5febaf1a9a..ae682ade615d 100644
> --- a/tools/testing/selftests/arm64/signal/Makefile
> +++ b/tools/testing/selftests/arm64/signal/Makefile
> @@ -2,7 +2,7 @@
>  # Copyright (C) 2019 ARM Limited
>  
>  # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>  
>  SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
>  PROGS := $(patsubst %.c,%,$(SRCS))
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index fb4472ddffd8..15e78ec7c55e 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  CFLAGS = -Wall
>  CFLAGS += -Wno-nonnull
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_PROGS := binfmt_script.py
>  TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> index 56b2b48a765b..6c29c963c7a8 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> @@ -2,6 +2,6 @@
>  
>  TEST_GEN_PROGS := dev_in_maps
>  
> -CFLAGS := -Wall -Werror
> +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
>  
>  include ../../lib.mk
> diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> index 2b5ea18bde38..0661b34488ef 100644
> --- a/tools/testing/selftests/hid/Makefile
> +++ b/tools/testing/selftests/hid/Makefile
> @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
>  
>  HOSTPKG_CONFIG := pkg-config
>  
> -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
>  CFLAGS += -I$(OUTPUT)/tools/include
>  
>  LDLIBS += -lelf -lz -lrt -lpthread
> diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> index 47669a1d6a59..bbc5b8ec3b17 100644
> --- a/tools/testing/selftests/nci/Makefile
> +++ b/tools/testing/selftests/nci/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>  LDFLAGS += -lpthread
>  
>  TEST_GEN_PROGS := nci_dev
> diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> index 01dc90fbb509..1a0aefec9d6f 100644
> --- a/tools/testing/selftests/prctl/Makefile
> +++ b/tools/testing/selftests/prctl/Makefile
> @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
>  ifeq ($(ARCH),x86)
>  TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
>  		disable-tsc-test set-anon-vma-name-test set-process-name
> +
> +CFLAGS += $(KHDR_INCLUDES)
>  all: $(TEST_PROGS)
>  
>  include ../lib.mk
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..9596014c10a0 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  CFLAGS += -Wall -O2 -Wno-unused-function
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  LDFLAGS += -pthread
>  
>  TEST_GEN_PROGS :=
> diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> index c333263f2b27..715a21241113 100644
> --- a/tools/testing/selftests/riscv/mm/Makefile
> +++ b/tools/testing/selftests/riscv/mm/Makefile
> @@ -3,7 +3,7 @@
>  # Originally tools/testing/arm64/abi/Makefile
>  
>  # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>  
>  TEST_GEN_FILES := mmap_default mmap_bottomup
>  
> diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> index 55198ecc04db..654f9d58da3c 100644
> --- a/tools/testing/selftests/rtc/Makefile
> +++ b/tools/testing/selftests/rtc/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>  LDLIBS += -lrt -lpthread -lm
>  
>  TEST_GEN_PROGS = rtctest
> diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> index aa11ccc92e5b..bcdc1bb6d2e6 100644
> --- a/tools/testing/selftests/tmpfs/Makefile
> +++ b/tools/testing/selftests/tmpfs/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  CFLAGS += -Wall -O2
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_GEN_PROGS :=
>  TEST_GEN_PROGS += bug-link-o-tmpfile

-- 
BR,
Muhammad Usama Anjum

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linux-riscv@lists.infradead.org
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[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/alsa/Makefile                  | 2 +-
>  tools/testing/selftests/arm64/signal/Makefile          | 2 +-
>  tools/testing/selftests/exec/Makefile                  | 2 +-
>  tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
>  tools/testing/selftests/hid/Makefile                   | 2 +-
>  tools/testing/selftests/nci/Makefile                   | 2 +-
>  tools/testing/selftests/prctl/Makefile                 | 2 ++
>  tools/testing/selftests/proc/Makefile                  | 2 +-
>  tools/testing/selftests/riscv/mm/Makefile              | 2 +-
>  tools/testing/selftests/rtc/Makefile                   | 2 +-
>  tools/testing/selftests/tmpfs/Makefile                 | 2 +-
>  11 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> index 5af9ba8a4645..9a0ef194522c 100644
> --- a/tools/testing/selftests/alsa/Makefile
> +++ b/tools/testing/selftests/alsa/Makefile
> @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
>  ifeq ($(LDLIBS),)
>  LDLIBS += -lasound
>  endif
> -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
>  
>  LDLIBS+=-lpthread
>  
> diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> index 8f5febaf1a9a..ae682ade615d 100644
> --- a/tools/testing/selftests/arm64/signal/Makefile
> +++ b/tools/testing/selftests/arm64/signal/Makefile
> @@ -2,7 +2,7 @@
>  # Copyright (C) 2019 ARM Limited
>  
>  # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>  
>  SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
>  PROGS := $(patsubst %.c,%,$(SRCS))
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index fb4472ddffd8..15e78ec7c55e 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  CFLAGS = -Wall
>  CFLAGS += -Wno-nonnull
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_PROGS := binfmt_script.py
>  TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> index 56b2b48a765b..6c29c963c7a8 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> @@ -2,6 +2,6 @@
>  
>  TEST_GEN_PROGS := dev_in_maps
>  
> -CFLAGS := -Wall -Werror
> +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
>  
>  include ../../lib.mk
> diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> index 2b5ea18bde38..0661b34488ef 100644
> --- a/tools/testing/selftests/hid/Makefile
> +++ b/tools/testing/selftests/hid/Makefile
> @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
>  
>  HOSTPKG_CONFIG := pkg-config
>  
> -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
>  CFLAGS += -I$(OUTPUT)/tools/include
>  
>  LDLIBS += -lelf -lz -lrt -lpthread
> diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> index 47669a1d6a59..bbc5b8ec3b17 100644
> --- a/tools/testing/selftests/nci/Makefile
> +++ b/tools/testing/selftests/nci/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>  LDFLAGS += -lpthread
>  
>  TEST_GEN_PROGS := nci_dev
> diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> index 01dc90fbb509..1a0aefec9d6f 100644
> --- a/tools/testing/selftests/prctl/Makefile
> +++ b/tools/testing/selftests/prctl/Makefile
> @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
>  ifeq ($(ARCH),x86)
>  TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
>  		disable-tsc-test set-anon-vma-name-test set-process-name
> +
> +CFLAGS += $(KHDR_INCLUDES)
>  all: $(TEST_PROGS)
>  
>  include ../lib.mk
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..9596014c10a0 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  CFLAGS += -Wall -O2 -Wno-unused-function
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  LDFLAGS += -pthread
>  
>  TEST_GEN_PROGS :=
> diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> index c333263f2b27..715a21241113 100644
> --- a/tools/testing/selftests/riscv/mm/Makefile
> +++ b/tools/testing/selftests/riscv/mm/Makefile
> @@ -3,7 +3,7 @@
>  # Originally tools/testing/arm64/abi/Makefile
>  
>  # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>  
>  TEST_GEN_FILES := mmap_default mmap_bottomup
>  
> diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> index 55198ecc04db..654f9d58da3c 100644
> --- a/tools/testing/selftests/rtc/Makefile
> +++ b/tools/testing/selftests/rtc/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>  LDLIBS += -lrt -lpthread -lm
>  
>  TEST_GEN_PROGS = rtctest
> diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> index aa11ccc92e5b..bcdc1bb6d2e6 100644
> --- a/tools/testing/selftests/tmpfs/Makefile
> +++ b/tools/testing/selftests/tmpfs/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  CFLAGS += -Wall -O2
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_GEN_PROGS :=
>  TEST_GEN_PROGS += bug-link-o-tmpfile

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/alsa/Makefile                  | 2 +-
>   tools/testing/selftests/arm64/signal/Makefile          | 2 +-
>   tools/testing/selftests/exec/Makefile                  | 2 +-
>   tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
>   tools/testing/selftests/hid/Makefile                   | 2 +-
>   tools/testing/selftests/nci/Makefile                   | 2 +-
>   tools/testing/selftests/prctl/Makefile                 | 2 ++
>   tools/testing/selftests/proc/Makefile                  | 2 +-
>   tools/testing/selftests/riscv/mm/Makefile              | 2 +-
>   tools/testing/selftests/rtc/Makefile                   | 2 +-
>   tools/testing/selftests/tmpfs/Makefile                 | 2 +-
>   11 files changed, 12 insertions(+), 10 deletions(-)

Hi Edward,

Seeing as how these all include lib.mk, and all use CFLAGS, is there
any reason not to simply fix this in lib.mk instead? Like this:

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7fa4a96e26ed..df72610e0d2b 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
  CFLAGS += $(USERCFLAGS)
  LDFLAGS += $(USERLDFLAGS)
  
+CFLAGS += $(KHDR_INCLUDES)
+
  # When make O= with kselftest target from main level
  # the following aren't defined.
  #


thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> index 5af9ba8a4645..9a0ef194522c 100644
> --- a/tools/testing/selftests/alsa/Makefile
> +++ b/tools/testing/selftests/alsa/Makefile
> @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
>   ifeq ($(LDLIBS),)
>   LDLIBS += -lasound
>   endif
> -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
>   
>   LDLIBS+=-lpthread
>   
> diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> index 8f5febaf1a9a..ae682ade615d 100644
> --- a/tools/testing/selftests/arm64/signal/Makefile
> +++ b/tools/testing/selftests/arm64/signal/Makefile
> @@ -2,7 +2,7 @@
>   # Copyright (C) 2019 ARM Limited
>   
>   # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>   
>   SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
>   PROGS := $(patsubst %.c,%,$(SRCS))
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index fb4472ddffd8..15e78ec7c55e 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -1,7 +1,7 @@
>   # SPDX-License-Identifier: GPL-2.0
>   CFLAGS = -Wall
>   CFLAGS += -Wno-nonnull
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_PROGS := binfmt_script.py
>   TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> index 56b2b48a765b..6c29c963c7a8 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> @@ -2,6 +2,6 @@
>   
>   TEST_GEN_PROGS := dev_in_maps
>   
> -CFLAGS := -Wall -Werror
> +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
>   
>   include ../../lib.mk
> diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> index 2b5ea18bde38..0661b34488ef 100644
> --- a/tools/testing/selftests/hid/Makefile
> +++ b/tools/testing/selftests/hid/Makefile
> @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
>   
>   HOSTPKG_CONFIG := pkg-config
>   
> -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
>   CFLAGS += -I$(OUTPUT)/tools/include
>   
>   LDLIBS += -lelf -lz -lrt -lpthread
> diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> index 47669a1d6a59..bbc5b8ec3b17 100644
> --- a/tools/testing/selftests/nci/Makefile
> +++ b/tools/testing/selftests/nci/Makefile
> @@ -1,5 +1,5 @@
>   # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>   LDFLAGS += -lpthread
>   
>   TEST_GEN_PROGS := nci_dev
> diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> index 01dc90fbb509..1a0aefec9d6f 100644
> --- a/tools/testing/selftests/prctl/Makefile
> +++ b/tools/testing/selftests/prctl/Makefile
> @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
>   ifeq ($(ARCH),x86)
>   TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
>   		disable-tsc-test set-anon-vma-name-test set-process-name
> +
> +CFLAGS += $(KHDR_INCLUDES)
>   all: $(TEST_PROGS)
>   
>   include ../lib.mk
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..9596014c10a0 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   CFLAGS += -Wall -O2 -Wno-unused-function
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   LDFLAGS += -pthread
>   
>   TEST_GEN_PROGS :=
> diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> index c333263f2b27..715a21241113 100644
> --- a/tools/testing/selftests/riscv/mm/Makefile
> +++ b/tools/testing/selftests/riscv/mm/Makefile
> @@ -3,7 +3,7 @@
>   # Originally tools/testing/arm64/abi/Makefile
>   
>   # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>   
>   TEST_GEN_FILES := mmap_default mmap_bottomup
>   
> diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> index 55198ecc04db..654f9d58da3c 100644
> --- a/tools/testing/selftests/rtc/Makefile
> +++ b/tools/testing/selftests/rtc/Makefile
> @@ -1,5 +1,5 @@
>   # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>   LDLIBS += -lrt -lpthread -lm
>   
>   TEST_GEN_PROGS = rtctest
> diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> index aa11ccc92e5b..bcdc1bb6d2e6 100644
> --- a/tools/testing/selftests/tmpfs/Makefile
> +++ b/tools/testing/selftests/tmpfs/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   CFLAGS += -Wall -O2
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_GEN_PROGS :=
>   TEST_GEN_PROGS += bug-link-o-tmpfile

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/alsa/Makefile                  | 2 +-
>   tools/testing/selftests/arm64/signal/Makefile          | 2 +-
>   tools/testing/selftests/exec/Makefile                  | 2 +-
>   tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
>   tools/testing/selftests/hid/Makefile                   | 2 +-
>   tools/testing/selftests/nci/Makefile                   | 2 +-
>   tools/testing/selftests/prctl/Makefile                 | 2 ++
>   tools/testing/selftests/proc/Makefile                  | 2 +-
>   tools/testing/selftests/riscv/mm/Makefile              | 2 +-
>   tools/testing/selftests/rtc/Makefile                   | 2 +-
>   tools/testing/selftests/tmpfs/Makefile                 | 2 +-
>   11 files changed, 12 insertions(+), 10 deletions(-)

Hi Edward,

Seeing as how these all include lib.mk, and all use CFLAGS, is there
any reason not to simply fix this in lib.mk instead? Like this:

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7fa4a96e26ed..df72610e0d2b 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
  CFLAGS += $(USERCFLAGS)
  LDFLAGS += $(USERLDFLAGS)
  
+CFLAGS += $(KHDR_INCLUDES)
+
  # When make O= with kselftest target from main level
  # the following aren't defined.
  #


thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> index 5af9ba8a4645..9a0ef194522c 100644
> --- a/tools/testing/selftests/alsa/Makefile
> +++ b/tools/testing/selftests/alsa/Makefile
> @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
>   ifeq ($(LDLIBS),)
>   LDLIBS += -lasound
>   endif
> -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
>   
>   LDLIBS+=-lpthread
>   
> diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> index 8f5febaf1a9a..ae682ade615d 100644
> --- a/tools/testing/selftests/arm64/signal/Makefile
> +++ b/tools/testing/selftests/arm64/signal/Makefile
> @@ -2,7 +2,7 @@
>   # Copyright (C) 2019 ARM Limited
>   
>   # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>   
>   SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
>   PROGS := $(patsubst %.c,%,$(SRCS))
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index fb4472ddffd8..15e78ec7c55e 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -1,7 +1,7 @@
>   # SPDX-License-Identifier: GPL-2.0
>   CFLAGS = -Wall
>   CFLAGS += -Wno-nonnull
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_PROGS := binfmt_script.py
>   TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> index 56b2b48a765b..6c29c963c7a8 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> @@ -2,6 +2,6 @@
>   
>   TEST_GEN_PROGS := dev_in_maps
>   
> -CFLAGS := -Wall -Werror
> +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
>   
>   include ../../lib.mk
> diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> index 2b5ea18bde38..0661b34488ef 100644
> --- a/tools/testing/selftests/hid/Makefile
> +++ b/tools/testing/selftests/hid/Makefile
> @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
>   
>   HOSTPKG_CONFIG := pkg-config
>   
> -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
>   CFLAGS += -I$(OUTPUT)/tools/include
>   
>   LDLIBS += -lelf -lz -lrt -lpthread
> diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> index 47669a1d6a59..bbc5b8ec3b17 100644
> --- a/tools/testing/selftests/nci/Makefile
> +++ b/tools/testing/selftests/nci/Makefile
> @@ -1,5 +1,5 @@
>   # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>   LDFLAGS += -lpthread
>   
>   TEST_GEN_PROGS := nci_dev
> diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> index 01dc90fbb509..1a0aefec9d6f 100644
> --- a/tools/testing/selftests/prctl/Makefile
> +++ b/tools/testing/selftests/prctl/Makefile
> @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
>   ifeq ($(ARCH),x86)
>   TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
>   		disable-tsc-test set-anon-vma-name-test set-process-name
> +
> +CFLAGS += $(KHDR_INCLUDES)
>   all: $(TEST_PROGS)
>   
>   include ../lib.mk
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..9596014c10a0 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   CFLAGS += -Wall -O2 -Wno-unused-function
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   LDFLAGS += -pthread
>   
>   TEST_GEN_PROGS :=
> diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> index c333263f2b27..715a21241113 100644
> --- a/tools/testing/selftests/riscv/mm/Makefile
> +++ b/tools/testing/selftests/riscv/mm/Makefile
> @@ -3,7 +3,7 @@
>   # Originally tools/testing/arm64/abi/Makefile
>   
>   # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>   
>   TEST_GEN_FILES := mmap_default mmap_bottomup
>   
> diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> index 55198ecc04db..654f9d58da3c 100644
> --- a/tools/testing/selftests/rtc/Makefile
> +++ b/tools/testing/selftests/rtc/Makefile
> @@ -1,5 +1,5 @@
>   # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>   LDLIBS += -lrt -lpthread -lm
>   
>   TEST_GEN_PROGS = rtctest
> diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> index aa11ccc92e5b..bcdc1bb6d2e6 100644
> --- a/tools/testing/selftests/tmpfs/Makefile
> +++ b/tools/testing/selftests/tmpfs/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   CFLAGS += -Wall -O2
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_GEN_PROGS :=
>   TEST_GEN_PROGS += bug-link-o-tmpfile



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[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> dependencies (-D_GNU_SOURCE).
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---
>   tools/testing/selftests/alsa/Makefile                  | 2 +-
>   tools/testing/selftests/arm64/signal/Makefile          | 2 +-
>   tools/testing/selftests/exec/Makefile                  | 2 +-
>   tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
>   tools/testing/selftests/hid/Makefile                   | 2 +-
>   tools/testing/selftests/nci/Makefile                   | 2 +-
>   tools/testing/selftests/prctl/Makefile                 | 2 ++
>   tools/testing/selftests/proc/Makefile                  | 2 +-
>   tools/testing/selftests/riscv/mm/Makefile              | 2 +-
>   tools/testing/selftests/rtc/Makefile                   | 2 +-
>   tools/testing/selftests/tmpfs/Makefile                 | 2 +-
>   11 files changed, 12 insertions(+), 10 deletions(-)

Hi Edward,

Seeing as how these all include lib.mk, and all use CFLAGS, is there
any reason not to simply fix this in lib.mk instead? Like this:

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7fa4a96e26ed..df72610e0d2b 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
  CFLAGS += $(USERCFLAGS)
  LDFLAGS += $(USERLDFLAGS)
  
+CFLAGS += $(KHDR_INCLUDES)
+
  # When make O= with kselftest target from main level
  # the following aren't defined.
  #


thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> index 5af9ba8a4645..9a0ef194522c 100644
> --- a/tools/testing/selftests/alsa/Makefile
> +++ b/tools/testing/selftests/alsa/Makefile
> @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
>   ifeq ($(LDLIBS),)
>   LDLIBS += -lasound
>   endif
> -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
>   
>   LDLIBS+=-lpthread
>   
> diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> index 8f5febaf1a9a..ae682ade615d 100644
> --- a/tools/testing/selftests/arm64/signal/Makefile
> +++ b/tools/testing/selftests/arm64/signal/Makefile
> @@ -2,7 +2,7 @@
>   # Copyright (C) 2019 ARM Limited
>   
>   # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>   
>   SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
>   PROGS := $(patsubst %.c,%,$(SRCS))
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index fb4472ddffd8..15e78ec7c55e 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -1,7 +1,7 @@
>   # SPDX-License-Identifier: GPL-2.0
>   CFLAGS = -Wall
>   CFLAGS += -Wno-nonnull
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_PROGS := binfmt_script.py
>   TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> index 56b2b48a765b..6c29c963c7a8 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> @@ -2,6 +2,6 @@
>   
>   TEST_GEN_PROGS := dev_in_maps
>   
> -CFLAGS := -Wall -Werror
> +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
>   
>   include ../../lib.mk
> diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> index 2b5ea18bde38..0661b34488ef 100644
> --- a/tools/testing/selftests/hid/Makefile
> +++ b/tools/testing/selftests/hid/Makefile
> @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
>   
>   HOSTPKG_CONFIG := pkg-config
>   
> -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
>   CFLAGS += -I$(OUTPUT)/tools/include
>   
>   LDLIBS += -lelf -lz -lrt -lpthread
> diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> index 47669a1d6a59..bbc5b8ec3b17 100644
> --- a/tools/testing/selftests/nci/Makefile
> +++ b/tools/testing/selftests/nci/Makefile
> @@ -1,5 +1,5 @@
>   # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>   LDFLAGS += -lpthread
>   
>   TEST_GEN_PROGS := nci_dev
> diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> index 01dc90fbb509..1a0aefec9d6f 100644
> --- a/tools/testing/selftests/prctl/Makefile
> +++ b/tools/testing/selftests/prctl/Makefile
> @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
>   ifeq ($(ARCH),x86)
>   TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
>   		disable-tsc-test set-anon-vma-name-test set-process-name
> +
> +CFLAGS += $(KHDR_INCLUDES)
>   all: $(TEST_PROGS)
>   
>   include ../lib.mk
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..9596014c10a0 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   CFLAGS += -Wall -O2 -Wno-unused-function
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   LDFLAGS += -pthread
>   
>   TEST_GEN_PROGS :=
> diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> index c333263f2b27..715a21241113 100644
> --- a/tools/testing/selftests/riscv/mm/Makefile
> +++ b/tools/testing/selftests/riscv/mm/Makefile
> @@ -3,7 +3,7 @@
>   # Originally tools/testing/arm64/abi/Makefile
>   
>   # Additional include paths needed by kselftest.h and local headers
> -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
>   
>   TEST_GEN_FILES := mmap_default mmap_bottomup
>   
> diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> index 55198ecc04db..654f9d58da3c 100644
> --- a/tools/testing/selftests/rtc/Makefile
> +++ b/tools/testing/selftests/rtc/Makefile
> @@ -1,5 +1,5 @@
>   # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
>   LDLIBS += -lrt -lpthread -lm
>   
>   TEST_GEN_PROGS = rtctest
> diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> index aa11ccc92e5b..bcdc1bb6d2e6 100644
> --- a/tools/testing/selftests/tmpfs/Makefile
> +++ b/tools/testing/selftests/tmpfs/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   CFLAGS += -Wall -O2
> -CFLAGS += -D_GNU_SOURCE
> +CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_GEN_PROGS :=
>   TEST_GEN_PROGS += bug-link-o-tmpfile

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

On Wed, May 8, 2024 at 2:41 PM John Hubbard <jhubbard@nvidia.com> wrote:
>
> On 5/7/24 2:38 PM, Edward Liaw wrote:
> > Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> > dependencies (-D_GNU_SOURCE).
> >
> > Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> > Signed-off-by: Edward Liaw <edliaw@google.com>
> > ---
> >   tools/testing/selftests/alsa/Makefile                  | 2 +-
> >   tools/testing/selftests/arm64/signal/Makefile          | 2 +-
> >   tools/testing/selftests/exec/Makefile                  | 2 +-
> >   tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
> >   tools/testing/selftests/hid/Makefile                   | 2 +-
> >   tools/testing/selftests/nci/Makefile                   | 2 +-
> >   tools/testing/selftests/prctl/Makefile                 | 2 ++
> >   tools/testing/selftests/proc/Makefile                  | 2 +-
> >   tools/testing/selftests/riscv/mm/Makefile              | 2 +-
> >   tools/testing/selftests/rtc/Makefile                   | 2 +-
> >   tools/testing/selftests/tmpfs/Makefile                 | 2 +-
> >   11 files changed, 12 insertions(+), 10 deletions(-)
>
> Hi Edward,
>
> Seeing as how these all include lib.mk, and all use CFLAGS, is there
> any reason not to simply fix this in lib.mk instead? Like this:
>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index 7fa4a96e26ed..df72610e0d2b 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
>   CFLAGS += $(USERCFLAGS)
>   LDFLAGS += $(USERLDFLAGS)
>
> +CFLAGS += $(KHDR_INCLUDES)
> +
>   # When make O= with kselftest target from main level
>   # the following aren't defined.
>   #
>

Or how about just adding -D_GNU_SOURCE to CFLAGS then?



>
> thanks,
> --
> John Hubbard
> NVIDIA
>
> >
> > diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> > index 5af9ba8a4645..9a0ef194522c 100644
> > --- a/tools/testing/selftests/alsa/Makefile
> > +++ b/tools/testing/selftests/alsa/Makefile
> > @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
> >   ifeq ($(LDLIBS),)
> >   LDLIBS += -lasound
> >   endif
> > -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> > +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
> >
> >   LDLIBS+=-lpthread
> >
> > diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> > index 8f5febaf1a9a..ae682ade615d 100644
> > --- a/tools/testing/selftests/arm64/signal/Makefile
> > +++ b/tools/testing/selftests/arm64/signal/Makefile
> > @@ -2,7 +2,7 @@
> >   # Copyright (C) 2019 ARM Limited
> >
> >   # Additional include paths needed by kselftest.h and local headers
> > -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> > +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
> >
> >   SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
> >   PROGS := $(patsubst %.c,%,$(SRCS))
> > diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> > index fb4472ddffd8..15e78ec7c55e 100644
> > --- a/tools/testing/selftests/exec/Makefile
> > +++ b/tools/testing/selftests/exec/Makefile
> > @@ -1,7 +1,7 @@
> >   # SPDX-License-Identifier: GPL-2.0
> >   CFLAGS = -Wall
> >   CFLAGS += -Wno-nonnull
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >
> >   TEST_PROGS := binfmt_script.py
> >   TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> > diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> > index 56b2b48a765b..6c29c963c7a8 100644
> > --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> > +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> > @@ -2,6 +2,6 @@
> >
> >   TEST_GEN_PROGS := dev_in_maps
> >
> > -CFLAGS := -Wall -Werror
> > +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
> >
> >   include ../../lib.mk
> > diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> > index 2b5ea18bde38..0661b34488ef 100644
> > --- a/tools/testing/selftests/hid/Makefile
> > +++ b/tools/testing/selftests/hid/Makefile
> > @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
> >
> >   HOSTPKG_CONFIG := pkg-config
> >
> > -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> > +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
> >   CFLAGS += -I$(OUTPUT)/tools/include
> >
> >   LDLIBS += -lelf -lz -lrt -lpthread
> > diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> > index 47669a1d6a59..bbc5b8ec3b17 100644
> > --- a/tools/testing/selftests/nci/Makefile
> > +++ b/tools/testing/selftests/nci/Makefile
> > @@ -1,5 +1,5 @@
> >   # SPDX-License-Identifier: GPL-2.0
> > -CFLAGS += -Wl,-no-as-needed -Wall
> > +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
> >   LDFLAGS += -lpthread
> >
> >   TEST_GEN_PROGS := nci_dev
> > diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> > index 01dc90fbb509..1a0aefec9d6f 100644
> > --- a/tools/testing/selftests/prctl/Makefile
> > +++ b/tools/testing/selftests/prctl/Makefile
> > @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
> >   ifeq ($(ARCH),x86)
> >   TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
> >               disable-tsc-test set-anon-vma-name-test set-process-name
> > +
> > +CFLAGS += $(KHDR_INCLUDES)
> >   all: $(TEST_PROGS)
> >
> >   include ../lib.mk
> > diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> > index cd95369254c0..9596014c10a0 100644
> > --- a/tools/testing/selftests/proc/Makefile
> > +++ b/tools/testing/selftests/proc/Makefile
> > @@ -1,6 +1,6 @@
> >   # SPDX-License-Identifier: GPL-2.0-only
> >   CFLAGS += -Wall -O2 -Wno-unused-function
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >   LDFLAGS += -pthread
> >
> >   TEST_GEN_PROGS :=
> > diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> > index c333263f2b27..715a21241113 100644
> > --- a/tools/testing/selftests/riscv/mm/Makefile
> > +++ b/tools/testing/selftests/riscv/mm/Makefile
> > @@ -3,7 +3,7 @@
> >   # Originally tools/testing/arm64/abi/Makefile
> >
> >   # Additional include paths needed by kselftest.h and local headers
> > -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> > +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
> >
> >   TEST_GEN_FILES := mmap_default mmap_bottomup
> >
> > diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> > index 55198ecc04db..654f9d58da3c 100644
> > --- a/tools/testing/selftests/rtc/Makefile
> > +++ b/tools/testing/selftests/rtc/Makefile
> > @@ -1,5 +1,5 @@
> >   # SPDX-License-Identifier: GPL-2.0
> > -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> > +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
> >   LDLIBS += -lrt -lpthread -lm
> >
> >   TEST_GEN_PROGS = rtctest
> > diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> > index aa11ccc92e5b..bcdc1bb6d2e6 100644
> > --- a/tools/testing/selftests/tmpfs/Makefile
> > +++ b/tools/testing/selftests/tmpfs/Makefile
> > @@ -1,6 +1,6 @@
> >   # SPDX-License-Identifier: GPL-2.0-only
> >   CFLAGS += -Wall -O2
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >
> >   TEST_GEN_PROGS :=
> >   TEST_GEN_PROGS += bug-link-o-tmpfile
>
>

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

On Wed, May 8, 2024 at 2:41 PM John Hubbard <jhubbard@nvidia.com> wrote:
>
> On 5/7/24 2:38 PM, Edward Liaw wrote:
> > Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> > dependencies (-D_GNU_SOURCE).
> >
> > Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> > Signed-off-by: Edward Liaw <edliaw@google.com>
> > ---
> >   tools/testing/selftests/alsa/Makefile                  | 2 +-
> >   tools/testing/selftests/arm64/signal/Makefile          | 2 +-
> >   tools/testing/selftests/exec/Makefile                  | 2 +-
> >   tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
> >   tools/testing/selftests/hid/Makefile                   | 2 +-
> >   tools/testing/selftests/nci/Makefile                   | 2 +-
> >   tools/testing/selftests/prctl/Makefile                 | 2 ++
> >   tools/testing/selftests/proc/Makefile                  | 2 +-
> >   tools/testing/selftests/riscv/mm/Makefile              | 2 +-
> >   tools/testing/selftests/rtc/Makefile                   | 2 +-
> >   tools/testing/selftests/tmpfs/Makefile                 | 2 +-
> >   11 files changed, 12 insertions(+), 10 deletions(-)
>
> Hi Edward,
>
> Seeing as how these all include lib.mk, and all use CFLAGS, is there
> any reason not to simply fix this in lib.mk instead? Like this:
>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index 7fa4a96e26ed..df72610e0d2b 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
>   CFLAGS += $(USERCFLAGS)
>   LDFLAGS += $(USERLDFLAGS)
>
> +CFLAGS += $(KHDR_INCLUDES)
> +
>   # When make O= with kselftest target from main level
>   # the following aren't defined.
>   #
>

Or how about just adding -D_GNU_SOURCE to CFLAGS then?



>
> thanks,
> --
> John Hubbard
> NVIDIA
>
> >
> > diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> > index 5af9ba8a4645..9a0ef194522c 100644
> > --- a/tools/testing/selftests/alsa/Makefile
> > +++ b/tools/testing/selftests/alsa/Makefile
> > @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
> >   ifeq ($(LDLIBS),)
> >   LDLIBS += -lasound
> >   endif
> > -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> > +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
> >
> >   LDLIBS+=-lpthread
> >
> > diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> > index 8f5febaf1a9a..ae682ade615d 100644
> > --- a/tools/testing/selftests/arm64/signal/Makefile
> > +++ b/tools/testing/selftests/arm64/signal/Makefile
> > @@ -2,7 +2,7 @@
> >   # Copyright (C) 2019 ARM Limited
> >
> >   # Additional include paths needed by kselftest.h and local headers
> > -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> > +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
> >
> >   SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
> >   PROGS := $(patsubst %.c,%,$(SRCS))
> > diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> > index fb4472ddffd8..15e78ec7c55e 100644
> > --- a/tools/testing/selftests/exec/Makefile
> > +++ b/tools/testing/selftests/exec/Makefile
> > @@ -1,7 +1,7 @@
> >   # SPDX-License-Identifier: GPL-2.0
> >   CFLAGS = -Wall
> >   CFLAGS += -Wno-nonnull
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >
> >   TEST_PROGS := binfmt_script.py
> >   TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> > diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> > index 56b2b48a765b..6c29c963c7a8 100644
> > --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> > +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> > @@ -2,6 +2,6 @@
> >
> >   TEST_GEN_PROGS := dev_in_maps
> >
> > -CFLAGS := -Wall -Werror
> > +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
> >
> >   include ../../lib.mk
> > diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> > index 2b5ea18bde38..0661b34488ef 100644
> > --- a/tools/testing/selftests/hid/Makefile
> > +++ b/tools/testing/selftests/hid/Makefile
> > @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
> >
> >   HOSTPKG_CONFIG := pkg-config
> >
> > -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> > +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
> >   CFLAGS += -I$(OUTPUT)/tools/include
> >
> >   LDLIBS += -lelf -lz -lrt -lpthread
> > diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> > index 47669a1d6a59..bbc5b8ec3b17 100644
> > --- a/tools/testing/selftests/nci/Makefile
> > +++ b/tools/testing/selftests/nci/Makefile
> > @@ -1,5 +1,5 @@
> >   # SPDX-License-Identifier: GPL-2.0
> > -CFLAGS += -Wl,-no-as-needed -Wall
> > +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
> >   LDFLAGS += -lpthread
> >
> >   TEST_GEN_PROGS := nci_dev
> > diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> > index 01dc90fbb509..1a0aefec9d6f 100644
> > --- a/tools/testing/selftests/prctl/Makefile
> > +++ b/tools/testing/selftests/prctl/Makefile
> > @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
> >   ifeq ($(ARCH),x86)
> >   TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
> >               disable-tsc-test set-anon-vma-name-test set-process-name
> > +
> > +CFLAGS += $(KHDR_INCLUDES)
> >   all: $(TEST_PROGS)
> >
> >   include ../lib.mk
> > diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> > index cd95369254c0..9596014c10a0 100644
> > --- a/tools/testing/selftests/proc/Makefile
> > +++ b/tools/testing/selftests/proc/Makefile
> > @@ -1,6 +1,6 @@
> >   # SPDX-License-Identifier: GPL-2.0-only
> >   CFLAGS += -Wall -O2 -Wno-unused-function
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >   LDFLAGS += -pthread
> >
> >   TEST_GEN_PROGS :=
> > diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> > index c333263f2b27..715a21241113 100644
> > --- a/tools/testing/selftests/riscv/mm/Makefile
> > +++ b/tools/testing/selftests/riscv/mm/Makefile
> > @@ -3,7 +3,7 @@
> >   # Originally tools/testing/arm64/abi/Makefile
> >
> >   # Additional include paths needed by kselftest.h and local headers
> > -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> > +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
> >
> >   TEST_GEN_FILES := mmap_default mmap_bottomup
> >
> > diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> > index 55198ecc04db..654f9d58da3c 100644
> > --- a/tools/testing/selftests/rtc/Makefile
> > +++ b/tools/testing/selftests/rtc/Makefile
> > @@ -1,5 +1,5 @@
> >   # SPDX-License-Identifier: GPL-2.0
> > -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> > +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
> >   LDLIBS += -lrt -lpthread -lm
> >
> >   TEST_GEN_PROGS = rtctest
> > diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> > index aa11ccc92e5b..bcdc1bb6d2e6 100644
> > --- a/tools/testing/selftests/tmpfs/Makefile
> > +++ b/tools/testing/selftests/tmpfs/Makefile
> > @@ -1,6 +1,6 @@
> >   # SPDX-License-Identifier: GPL-2.0-only
> >   CFLAGS += -Wall -O2
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >
> >   TEST_GEN_PROGS :=
> >   TEST_GEN_PROGS += bug-link-o-tmpfile
>
>

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[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Edward Liaw]

On Wed, May 8, 2024 at 2:41?PM John Hubbard <jhubbard@nvidia.com> wrote:
>
> On 5/7/24 2:38 PM, Edward Liaw wrote:
> > Add KHDR_INCLUDES to CFLAGS to pull in the kselftest harness
> > dependencies (-D_GNU_SOURCE).
> >
> > Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> > Signed-off-by: Edward Liaw <edliaw@google.com>
> > ---
> >   tools/testing/selftests/alsa/Makefile                  | 2 +-
> >   tools/testing/selftests/arm64/signal/Makefile          | 2 +-
> >   tools/testing/selftests/exec/Makefile                  | 2 +-
> >   tools/testing/selftests/filesystems/overlayfs/Makefile | 2 +-
> >   tools/testing/selftests/hid/Makefile                   | 2 +-
> >   tools/testing/selftests/nci/Makefile                   | 2 +-
> >   tools/testing/selftests/prctl/Makefile                 | 2 ++
> >   tools/testing/selftests/proc/Makefile                  | 2 +-
> >   tools/testing/selftests/riscv/mm/Makefile              | 2 +-
> >   tools/testing/selftests/rtc/Makefile                   | 2 +-
> >   tools/testing/selftests/tmpfs/Makefile                 | 2 +-
> >   11 files changed, 12 insertions(+), 10 deletions(-)
>
> Hi Edward,
>
> Seeing as how these all include lib.mk, and all use CFLAGS, is there
> any reason not to simply fix this in lib.mk instead? Like this:
>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index 7fa4a96e26ed..df72610e0d2b 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
>   CFLAGS += $(USERCFLAGS)
>   LDFLAGS += $(USERLDFLAGS)
>
> +CFLAGS += $(KHDR_INCLUDES)
> +
>   # When make O= with kselftest target from main level
>   # the following aren't defined.
>   #
>

Or how about just adding -D_GNU_SOURCE to CFLAGS then?



>
> thanks,
> --
> John Hubbard
> NVIDIA
>
> >
> > diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
> > index 5af9ba8a4645..9a0ef194522c 100644
> > --- a/tools/testing/selftests/alsa/Makefile
> > +++ b/tools/testing/selftests/alsa/Makefile
> > @@ -6,7 +6,7 @@ LDLIBS += $(shell pkg-config --libs alsa)
> >   ifeq ($(LDLIBS),)
> >   LDLIBS += -lasound
> >   endif
> > -CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
> > +CFLAGS += $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./
> >
> >   LDLIBS+=-lpthread
> >
> > diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
> > index 8f5febaf1a9a..ae682ade615d 100644
> > --- a/tools/testing/selftests/arm64/signal/Makefile
> > +++ b/tools/testing/selftests/arm64/signal/Makefile
> > @@ -2,7 +2,7 @@
> >   # Copyright (C) 2019 ARM Limited
> >
> >   # Additional include paths needed by kselftest.h and local headers
> > -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> > +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
> >
> >   SRCS := $(filter-out testcases/testcases.c,$(wildcard testcases/*.c))
> >   PROGS := $(patsubst %.c,%,$(SRCS))
> > diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> > index fb4472ddffd8..15e78ec7c55e 100644
> > --- a/tools/testing/selftests/exec/Makefile
> > +++ b/tools/testing/selftests/exec/Makefile
> > @@ -1,7 +1,7 @@
> >   # SPDX-License-Identifier: GPL-2.0
> >   CFLAGS = -Wall
> >   CFLAGS += -Wno-nonnull
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >
> >   TEST_PROGS := binfmt_script.py
> >   TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
> > diff --git a/tools/testing/selftests/filesystems/overlayfs/Makefile b/tools/testing/selftests/filesystems/overlayfs/Makefile
> > index 56b2b48a765b..6c29c963c7a8 100644
> > --- a/tools/testing/selftests/filesystems/overlayfs/Makefile
> > +++ b/tools/testing/selftests/filesystems/overlayfs/Makefile
> > @@ -2,6 +2,6 @@
> >
> >   TEST_GEN_PROGS := dev_in_maps
> >
> > -CFLAGS := -Wall -Werror
> > +CFLAGS := -Wall -Werror $(KHDR_INCLUDES)
> >
> >   include ../../lib.mk
> > diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
> > index 2b5ea18bde38..0661b34488ef 100644
> > --- a/tools/testing/selftests/hid/Makefile
> > +++ b/tools/testing/selftests/hid/Makefile
> > @@ -21,7 +21,7 @@ CXX ?= $(CROSS_COMPILE)g++
> >
> >   HOSTPKG_CONFIG := pkg-config
> >
> > -CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
> > +CFLAGS += -g -O0 -rdynamic -Wall -Werror $(KHDR_INCLUDES) -I$(OUTPUT)
> >   CFLAGS += -I$(OUTPUT)/tools/include
> >
> >   LDLIBS += -lelf -lz -lrt -lpthread
> > diff --git a/tools/testing/selftests/nci/Makefile b/tools/testing/selftests/nci/Makefile
> > index 47669a1d6a59..bbc5b8ec3b17 100644
> > --- a/tools/testing/selftests/nci/Makefile
> > +++ b/tools/testing/selftests/nci/Makefile
> > @@ -1,5 +1,5 @@
> >   # SPDX-License-Identifier: GPL-2.0
> > -CFLAGS += -Wl,-no-as-needed -Wall
> > +CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
> >   LDFLAGS += -lpthread
> >
> >   TEST_GEN_PROGS := nci_dev
> > diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
> > index 01dc90fbb509..1a0aefec9d6f 100644
> > --- a/tools/testing/selftests/prctl/Makefile
> > +++ b/tools/testing/selftests/prctl/Makefile
> > @@ -6,6 +6,8 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
> >   ifeq ($(ARCH),x86)
> >   TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
> >               disable-tsc-test set-anon-vma-name-test set-process-name
> > +
> > +CFLAGS += $(KHDR_INCLUDES)
> >   all: $(TEST_PROGS)
> >
> >   include ../lib.mk
> > diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> > index cd95369254c0..9596014c10a0 100644
> > --- a/tools/testing/selftests/proc/Makefile
> > +++ b/tools/testing/selftests/proc/Makefile
> > @@ -1,6 +1,6 @@
> >   # SPDX-License-Identifier: GPL-2.0-only
> >   CFLAGS += -Wall -O2 -Wno-unused-function
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >   LDFLAGS += -pthread
> >
> >   TEST_GEN_PROGS :=
> > diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
> > index c333263f2b27..715a21241113 100644
> > --- a/tools/testing/selftests/riscv/mm/Makefile
> > +++ b/tools/testing/selftests/riscv/mm/Makefile
> > @@ -3,7 +3,7 @@
> >   # Originally tools/testing/arm64/abi/Makefile
> >
> >   # Additional include paths needed by kselftest.h and local headers
> > -CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
> > +CFLAGS += $(KHDR_INCLUDES) -std=gnu99 -I.
> >
> >   TEST_GEN_FILES := mmap_default mmap_bottomup
> >
> > diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
> > index 55198ecc04db..654f9d58da3c 100644
> > --- a/tools/testing/selftests/rtc/Makefile
> > +++ b/tools/testing/selftests/rtc/Makefile
> > @@ -1,5 +1,5 @@
> >   # SPDX-License-Identifier: GPL-2.0
> > -CFLAGS += -O3 -Wl,-no-as-needed -Wall
> > +CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
> >   LDLIBS += -lrt -lpthread -lm
> >
> >   TEST_GEN_PROGS = rtctest
> > diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
> > index aa11ccc92e5b..bcdc1bb6d2e6 100644
> > --- a/tools/testing/selftests/tmpfs/Makefile
> > +++ b/tools/testing/selftests/tmpfs/Makefile
> > @@ -1,6 +1,6 @@
> >   # SPDX-License-Identifier: GPL-2.0-only
> >   CFLAGS += -Wall -O2
> > -CFLAGS += -D_GNU_SOURCE
> > +CFLAGS += $(KHDR_INCLUDES)
> >
> >   TEST_GEN_PROGS :=
> >   TEST_GEN_PROGS += bug-link-o-tmpfile
>
>

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/8/24 5:29 PM, Edward Liaw wrote:
> On Wed, May 8, 2024 at 2:41 PM John Hubbard <jhubbard@nvidia.com> wrote:
>> On 5/7/24 2:38 PM, Edward Liaw wrote:
...
>> Seeing as how these all include lib.mk, and all use CFLAGS, is there
>> any reason not to simply fix this in lib.mk instead? Like this:
>>
>> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
>> index 7fa4a96e26ed..df72610e0d2b 100644
>> --- a/tools/testing/selftests/lib.mk
>> +++ b/tools/testing/selftests/lib.mk
>> @@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
>>    CFLAGS += $(USERCFLAGS)
>>    LDFLAGS += $(USERLDFLAGS)
>>
>> +CFLAGS += $(KHDR_INCLUDES)
>> +
>>    # When make O= with kselftest target from main level
>>    # the following aren't defined.
>>    #
>>
> 
> Or how about just adding -D_GNU_SOURCE to CFLAGS then?

Yes, that would also work. I think either one would be good.


thanks,
-- 
John Hubbard
NVIDIA

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/8/24 5:29 PM, Edward Liaw wrote:
> On Wed, May 8, 2024 at 2:41 PM John Hubbard <jhubbard@nvidia.com> wrote:
>> On 5/7/24 2:38 PM, Edward Liaw wrote:
...
>> Seeing as how these all include lib.mk, and all use CFLAGS, is there
>> any reason not to simply fix this in lib.mk instead? Like this:
>>
>> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
>> index 7fa4a96e26ed..df72610e0d2b 100644
>> --- a/tools/testing/selftests/lib.mk
>> +++ b/tools/testing/selftests/lib.mk
>> @@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
>>    CFLAGS += $(USERCFLAGS)
>>    LDFLAGS += $(USERLDFLAGS)
>>
>> +CFLAGS += $(KHDR_INCLUDES)
>> +
>>    # When make O= with kselftest target from main level
>>    # the following aren't defined.
>>    #
>>
> 
> Or how about just adding -D_GNU_SOURCE to CFLAGS then?

Yes, that would also work. I think either one would be good.


thanks,
-- 
John Hubbard
NVIDIA


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[John Hubbard]

On 5/8/24 5:29 PM, Edward Liaw wrote:
> On Wed, May 8, 2024 at 2:41?PM John Hubbard <jhubbard@nvidia.com> wrote:
>> On 5/7/24 2:38 PM, Edward Liaw wrote:
...
>> Seeing as how these all include lib.mk, and all use CFLAGS, is there
>> any reason not to simply fix this in lib.mk instead? Like this:
>>
>> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
>> index 7fa4a96e26ed..df72610e0d2b 100644
>> --- a/tools/testing/selftests/lib.mk
>> +++ b/tools/testing/selftests/lib.mk
>> @@ -170,6 +170,8 @@ clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
>>    CFLAGS += $(USERCFLAGS)
>>    LDFLAGS += $(USERLDFLAGS)
>>
>> +CFLAGS += $(KHDR_INCLUDES)
>> +
>>    # When make O= with kselftest target from main level
>>    # the following aren't defined.
>>    #
>>
> 
> Or how about just adding -D_GNU_SOURCE to CFLAGS then?

Yes, that would also work. I think either one would be good.


thanks,
-- 
John Hubbard
NVIDIA

Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Mark Brown]

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On Tue, May 07, 2024 at 09:38:28PM +0000, Edward Liaw wrote:

>  tools/testing/selftests/arm64/signal/Makefile          | 2 +-

This is not really using any of the kselftest framework at all to build
so I'm not sure the change makes sense for it.  OTOH it does no harm...

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Re: [PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 272 bytes --]

On Tue, May 07, 2024 at 09:38:28PM +0000, Edward Liaw wrote:

>  tools/testing/selftests/arm64/signal/Makefile          | 2 +-

This is not really using any of the kselftest framework at all to build
so I'm not sure the change makes sense for it.  OTOH it does no harm...

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[-- Attachment #2: Type: text/plain, Size: 161 bytes --]

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 3/5] selftests: Include KHDR_INCLUDES in Makefile

[Mark Brown]

On Tue, May 07, 2024 at 09:38:28PM +0000, Edward Liaw wrote:

>  tools/testing/selftests/arm64/signal/Makefile          | 2 +-

This is not really using any of the kselftest framework at all to build
so I'm not sure the change makes sense for it.  OTOH it does no harm...
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[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Edward Liaw]

_GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
prevent _GNU_SOURCE redefined warnings.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
 tools/testing/selftests/capabilities/test_execve.c            | 2 --
 tools/testing/selftests/clone3/clone3.c                       | 2 --
 .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
 tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
 tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
 tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
 tools/testing/selftests/core/close_range_test.c               | 2 --
 tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
 tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
 tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
 tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
 tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
 tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
 tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
 tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
 tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
 .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
 tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
 tools/testing/selftests/ipc/msgque.c                          | 1 -
 tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
 tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
 tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
 tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
 tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
 tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
 tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
 tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
 tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
 tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
 tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
 tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
 tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
 tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
 tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
 tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
 tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
 tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
 tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
 .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
 tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
 tools/testing/selftests/kvm/rseq_test.c                       | 1 -
 tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
 tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
 tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
 tools/testing/selftests/kvm/steal_time.c                      | 1 -
 tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
 tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
 .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
 tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
 .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
 tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
 tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
 tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
 tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
 tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
 .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
 tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
 tools/testing/selftests/landlock/base_test.c                  | 2 --
 tools/testing/selftests/landlock/fs_test.c                    | 2 --
 tools/testing/selftests/landlock/net_test.c                   | 2 --
 tools/testing/selftests/landlock/ptrace_test.c                | 2 --
 tools/testing/selftests/lsm/common.c                          | 2 --
 tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
 tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
 tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
 tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
 .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
 .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
 tools/testing/selftests/memfd/common.c                        | 1 -
 tools/testing/selftests/memfd/fuse_test.c                     | 2 --
 tools/testing/selftests/memfd/memfd_test.c                    | 1 -
 tools/testing/selftests/mm/cow.c                              | 1 -
 tools/testing/selftests/mm/gup_longterm.c                     | 1 -
 tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
 tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
 tools/testing/selftests/mm/khugepaged.c                       | 1 -
 tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
 tools/testing/selftests/mm/madv_populate.c                    | 1 -
 tools/testing/selftests/mm/map_populate.c                     | 2 --
 tools/testing/selftests/mm/mdwe_test.c                        | 1 -
 tools/testing/selftests/mm/memfd_secret.c                     | 2 --
 tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
 tools/testing/selftests/mm/mrelease_test.c                    | 1 -
 tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
 tools/testing/selftests/mm/mremap_test.c                      | 2 --
 tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
 tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
 tools/testing/selftests/mm/protection_keys.c                  | 1 -
 tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
 tools/testing/selftests/mm/thuge-gen.c                        | 2 --
 tools/testing/selftests/mm/uffd-common.h                      | 1 -
 tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
 .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
 tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
 tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
 tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
 tools/testing/selftests/net/csum.c                            | 3 ---
 tools/testing/selftests/net/gro.c                             | 3 ---
 tools/testing/selftests/net/ip_defrag.c                       | 3 ---
 tools/testing/selftests/net/ipsec.c                           | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
 tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
 tools/testing/selftests/net/nettest.c                         | 2 --
 tools/testing/selftests/net/psock_fanout.c                    | 3 ---
 tools/testing/selftests/net/psock_snd.c                       | 3 ---
 tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
 tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
 tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
 tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
 tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
 tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
 tools/testing/selftests/net/so_txtime.c                       | 3 ---
 tools/testing/selftests/net/tap.c                             | 3 ---
 tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
 tools/testing/selftests/net/tcp_inq.c                         | 2 --
 tools/testing/selftests/net/tcp_mmap.c                        | 1 -
 tools/testing/selftests/net/tls.c                             | 3 ---
 tools/testing/selftests/net/toeplitz.c                        | 3 ---
 tools/testing/selftests/net/tun.c                             | 3 ---
 tools/testing/selftests/net/txring_overwrite.c                | 3 ---
 tools/testing/selftests/net/txtimestamp.c                     | 3 ---
 tools/testing/selftests/net/udpgso.c                          | 3 ---
 tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
 tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
 tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
 tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
 tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
 tools/testing/selftests/pidfd/pidfd.h                         | 1 -
 tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
 tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
 tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
 tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
 tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
 tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
 tools/testing/selftests/rseq/basic_test.c                     | 2 --
 tools/testing/selftests/rseq/param_test.c                     | 1 -
 tools/testing/selftests/rseq/rseq.c                           | 2 --
 tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
 tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
 tools/testing/selftests/user_events/abi_test.c                | 2 --
 tools/testing/selftests/x86/amx.c                             | 2 --
 tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
 tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
 tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
 tools/testing/selftests/x86/fsgsbase.c                        | 2 --
 tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
 tools/testing/selftests/x86/ioperm.c                          | 2 --
 tools/testing/selftests/x86/iopl.c                            | 2 --
 tools/testing/selftests/x86/lam.c                             | 1 -
 tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
 tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
 tools/testing/selftests/x86/nx_stack.c                        | 2 --
 tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
 tools/testing/selftests/x86/sigaltstack.c                     | 2 --
 tools/testing/selftests/x86/sigreturn.c                       | 3 ---
 tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
 tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
 tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
 tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
 tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
 tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
 tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
 tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
 tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
 tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
 tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
 tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
 tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
 tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
 198 files changed, 405 deletions(-)

diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
index b171fd53b004..c1a6ce7b0912 100644
--- a/tools/testing/selftests/cachestat/test_cachestat.c
+++ b/tools/testing/selftests/cachestat/test_cachestat.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdbool.h>
 #include <linux/kernel.h>
diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
index 7cde07a5df78..e3954b88c3ee 100644
--- a/tools/testing/selftests/capabilities/test_execve.c
+++ b/tools/testing/selftests/capabilities/test_execve.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <cap-ng.h>
 #include <linux/capability.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 3c9bf0cd82a8..3c5e45dae617 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
 /* Based on Christian Brauner's clone3() example */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <inttypes.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
index 31b56d625655..bb99ea20f7d5 100644
--- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
+++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
@@ -7,8 +7,6 @@
  */
 
 /* capabilities related code based on selftests/bpf/test_verifier.c */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <linux/sched.h>
diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
index 54a8b2445be9..50336d56db6b 100644
--- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
+++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <sched.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
index 3d2663fe50ba..172e19d5515f 100644
--- a/tools/testing/selftests/clone3/clone3_selftests.h
+++ b/tools/testing/selftests/clone3/clone3_selftests.h
@@ -3,7 +3,6 @@
 #ifndef _CLONE3_SELFTESTS_H
 #define _CLONE3_SELFTESTS_H
 
-#define _GNU_SOURCE
 #include <sched.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
index ed785afb6077..8b5ed4484ee6 100644
--- a/tools/testing/selftests/clone3/clone3_set_tid.c
+++ b/tools/testing/selftests/clone3/clone3_set_tid.c
@@ -5,8 +5,6 @@
  * These tests are assuming to be running in the host's
  * PID namespace.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <linux/sched.h>
diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
index c59e4adb905d..1c2902bcc913 100644
--- a/tools/testing/selftests/core/close_range_test.c
+++ b/tools/testing/selftests/core/close_range_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/kernel.h>
diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
index c812080e304e..7c8dbab8ac44 100644
--- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
+++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <stdio.h>
diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
index e0319417124d..6b411859c2cd 100644
--- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
+++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
index 5f362c0fd890..fca693db1b09 100644
--- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
+++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
index b1fc9b916ace..73766447eeb0 100644
--- a/tools/testing/selftests/filesystems/devpts_pts.c
+++ b/tools/testing/selftests/filesystems/devpts_pts.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
index c0a9b2d3302d..05367a70b963 100644
--- a/tools/testing/selftests/filesystems/dnotify_test.c
+++ b/tools/testing/selftests/filesystems/dnotify_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE	/* needed to get the defines */
 #include <fcntl.h>	/* in glibc 2.2 this has the needed
 				   values defined */
 #include <signal.h>
diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
index 65ede506305c..9bc2ddad7e92 100644
--- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
+++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <asm/unistd.h>
 #include <linux/time_types.h>
 #include <poll.h>
diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
index f142a137526c..17935f42fbc9 100644
--- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
+++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <asm/unistd.h>
diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
index e488ad354fce..56cf3ad8640d 100644
--- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
+++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
@@ -6,8 +6,6 @@
  * Copyright 2022 Red Hat Inc.
  * Author: Javier Martinez Canillas <javierm@redhat.com>
  */
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
index 759f86e7d263..b58a80bde95a 100644
--- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
+++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <inttypes.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
index 3eafd7da58e2..d1cefd1b7d16 100644
--- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
+++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <stdint.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
index 7f3ca5c78df1..8e41f9fe784c 100644
--- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
+++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
@@ -16,9 +16,6 @@
  *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
  *
  *****************************************************************************/
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <limits.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
index 656c43c24044..291c81d59a9d 100644
--- a/tools/testing/selftests/ipc/msgque.c
+++ b/tools/testing/selftests/ipc/msgque.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
index 25110c7c0b3e..885c9e943cee 100644
--- a/tools/testing/selftests/kcmp/kcmp_test.c
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
index 4eaba83cdcf3..5369959e9fc2 100644
--- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
+++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
@@ -5,8 +5,6 @@
  *
  * Copyright (c) 2021, Google LLC.
  */
-#define _GNU_SOURCE
-
 #include "arch_timer.h"
 #include "delay.h"
 #include "gic.h"
diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
index 5972905275cf..79e99f47a9fe 100644
--- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
+++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
@@ -7,7 +7,6 @@
  * hugetlbfs with a hole). It checks that the expected handling method is
  * called (e.g., uffd faults with the right address and write/read flag).
  */
-#define _GNU_SOURCE
 #include <linux/bitmap.h>
 #include <fcntl.h>
 #include <test_util.h>
diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
index 9b004905d1d3..1c8c6f0c1ca3 100644
--- a/tools/testing/selftests/kvm/aarch64/psci_test.c
+++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
@@ -10,9 +10,6 @@
  *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
  *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
  */
-
-#define _GNU_SOURCE
-
 #include <linux/psci.h>
 
 #include "kvm_util.h"
diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
index ca917c71ff60..b3b5fb0ff0a9 100644
--- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
+++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE
 #include <linux/kernel.h>
 #include <sys/syscall.h>
 #include <asm/kvm.h>
diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
index ae1f1a6d8312..fcebd8d81ce4 100644
--- a/tools/testing/selftests/kvm/arch_timer.c
+++ b/tools/testing/selftests/kvm/arch_timer.c
@@ -19,9 +19,6 @@
  *
  * Copyright (c) 2021, Google LLC.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <pthread.h>
 #include <linux/sizes.h>
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index bf3609f71854..0c4d3b6afbf8 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019, Google, Inc.
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index eaad5b20854c..bf1ebc29f22a 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Red Hat, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
index 92eae206baa6..309fe84b84ad 100644
--- a/tools/testing/selftests/kvm/guest_memfd_test.c
+++ b/tools/testing/selftests/kvm/guest_memfd_test.c
@@ -4,8 +4,6 @@
  *
  * Author: Chao Peng <chao.p.peng@linux.intel.com>
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
index decc521fc760..bce73bcb973c 100644
--- a/tools/testing/selftests/kvm/hardware_disable_test.c
+++ b/tools/testing/selftests/kvm/hardware_disable_test.c
@@ -4,9 +4,6 @@
  * kvm_arch_hardware_disable is called and it attempts to unregister the user
  * return notifiers.
  */
-
-#define _GNU_SOURCE
-
 #include <fcntl.h>
 #include <pthread.h>
 #include <semaphore.h>
diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
index 877449c34592..a9d97c213584 100644
--- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
+++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
@@ -5,9 +5,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019-2022 Google LLC
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <time.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
index 698c1cfa3111..f02355c3c4c2 100644
--- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
+++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
@@ -6,8 +6,6 @@
  *
  * Test the fd-based interface for KVM statistics.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
index b9e23265e4b3..c78f34699f73 100644
--- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
+++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
@@ -6,8 +6,6 @@
  *
  * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
index e0ba97ac1c56..7759c685086b 100644
--- a/tools/testing/selftests/kvm/kvm_page_table_test.c
+++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
@@ -8,9 +8,6 @@
  * page size have been pre-allocated on your system, if you are planning to
  * use hugepages to back the guest memory for testing.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
index 2bd25b191d15..b49690658c60 100644
--- a/tools/testing/selftests/kvm/lib/assert.c
+++ b/tools/testing/selftests/kvm/lib/assert.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Google LLC.
  */
-
-#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
-
 #include "test_util.h"
 
 #include <execinfo.h>
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index b2262b5fad9e..1eaf001d0ad4 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2018, Google LLC.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
 #include "test_util.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
index cf2c73971308..555e3932e529 100644
--- a/tools/testing/selftests/kvm/lib/memstress.c
+++ b/tools/testing/selftests/kvm/lib/memstress.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2020, Google LLC.
  */
-#define _GNU_SOURCE
-
 #include <inttypes.h>
 #include <linux/bitmap.h>
 
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index 5a8f8becb129..8ed0b74ae837 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2020, Google LLC.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdarg.h>
 #include <assert.h>
diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
index f4eef6eb2dc2..bd07568a5240 100644
--- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
+++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019-2022 Google LLC
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
index e248d3364b9c..e83809febae1 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <stdint.h>
 #include <stdbool.h>
 
diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
index 1a6da7389bf1..0b9678858b6d 100644
--- a/tools/testing/selftests/kvm/max_guest_memory_test.c
+++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
index 156361966612..05fcf902e067 100644
--- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
+++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2020, Google, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
index 0f9cabd99fd4..4b5004ef9c6b 100644
--- a/tools/testing/selftests/kvm/riscv/arch_timer.c
+++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
@@ -7,9 +7,6 @@
  *
  * Copyright (c) 2024, Intel Corporation.
  */
-
-#define _GNU_SOURCE
-
 #include "arch_timer.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
index 28f97fb52044..b3536400f9ac 100644
--- a/tools/testing/selftests/kvm/rseq_test.c
+++ b/tools/testing/selftests/kvm/rseq_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
index 626a2b8a2037..84ba79c42ab1 100644
--- a/tools/testing/selftests/kvm/s390x/cmma_test.c
+++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
@@ -7,8 +7,6 @@
  * Authors:
  *  Nico Boehr <nrb@linux.ibm.com>
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
index 43fb25ddc3ec..53def355ccba 100644
--- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
@@ -10,8 +10,6 @@
  *
  * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
index bd57d991e27d..214ff84f6fdb 100644
--- a/tools/testing/selftests/kvm/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/set_memory_region_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <pthread.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
index bae0c5026f82..e9231387c589 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <time.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index eae521f050e0..8e5713e36d4b 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -6,8 +6,6 @@
  *
  * Tests for amx #NM exception and save/restore.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
index 6c2e5e0ceb1f..9c21b6bccc38 100644
--- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
+++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
@@ -4,9 +4,6 @@
  *
  * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "flds_emulation.h"
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
index df351ae17029..10b1b0ba374e 100644
--- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2023, Google LLC.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
index 5c27efbf405e..4f5881d4ef66 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
@@ -7,8 +7,6 @@
  * This work is licensed under the terms of the GNU GPL, version 2.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
index 4c7257ecd2a6..4f3f3a9b038b 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
@@ -4,7 +4,6 @@
  *
  * Tests for Enlightened VMCS, including nested guest state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
index f1617762c22f..8206f5ef42dd 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2022, Red Hat, Inc.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <pthread.h>
 #include <inttypes.h>
 
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
index c9b18707edc0..b987a3d79715 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
@@ -4,7 +4,6 @@
  *
  * Tests for Hyper-V extensions to SVM.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
index 05b56095cf76..077cd0ec3040 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2022, Red Hat, Inc.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <asm/barrier.h>
 #include <pthread.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
index 3670331adf21..3eb0313ffa39 100644
--- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "test_util.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
index 17bbb96fc4df..e7efb2b35f8b 100644
--- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
@@ -5,9 +5,6 @@
  *
  * Copyright (C) 2022, Google LLC.
  */
-
-#define _GNU_SOURCE
-
 #include <fcntl.h>
 #include <stdint.h>
 #include <time.h>
diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
index 87011965dc41..2165b1ad8b38 100644
--- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
+++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
@@ -9,8 +9,6 @@
  * Verifies expected behavior of controlling guest access to
  * MSR_PLATFORM_INFO.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
index 26c85815f7e9..77f14138594e 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2023, Tencent, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <x86intrin.h>
 
 #include "pmu.h"
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
index 3c85d1ae9893..5ce53b8c46e0 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
@@ -9,9 +9,6 @@
  * Verifies the expected behavior of allow lists and deny lists for
  * virtual PMU events.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "kvm_util.h"
 #include "pmu.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
index e0f642d2a3c4..82a8d88b5338 100644
--- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
@@ -2,7 +2,6 @@
 /*
  * Copyright (C) 2022, Google LLC.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <limits.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
index 366cf18600bc..d691d86e5bc3 100644
--- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
+++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE /* for program_invocation_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
index 3610981d9162..c021c0795a96 100644
--- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
@@ -10,7 +10,6 @@
  * That bug allowed a user-mode program that called the KVM_SET_SREGS
  * ioctl to put a VCPU's local APIC into an invalid state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
index 416207c38a17..362be40fc00d 100644
--- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
@@ -5,9 +5,6 @@
  * Test that KVM emulates instructions in response to EPT violations when
  * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "flds_emulation.h"
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
index e18b86666e1f..55c88d664a94 100644
--- a/tools/testing/selftests/kvm/x86_64/smm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
@@ -4,7 +4,6 @@
  *
  * Tests for SMM.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
index 88b58aab7207..1c756db329e5 100644
--- a/tools/testing/selftests/kvm/x86_64/state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/state_test.c
@@ -6,7 +6,6 @@
  *
  * Tests for vCPU state save/restore, including nested guest state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
index adb5593daf48..8fa3948b0170 100644
--- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
@@ -8,8 +8,6 @@
  * including requesting an invalid register set, updates to/from values
  * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
index dcbb3c29fb8e..abe71946941f 100644
--- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
+++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
@@ -17,8 +17,6 @@
  * delivered into the guest or not.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <pthread.h>
 #include <inttypes.h>
 #include <string.h>
diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
index f4f61a2d2464..53afbea4df88 100644
--- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
+++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
@@ -4,8 +4,6 @@
  *
  * Tests for exiting into userspace on registered MSRs
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "kvm_test_harness.h"
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
index 977948fd52e6..fa512d033205 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Red Hat, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <linux/bitmap.h>
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
index ea0cb3cae0f7..3b93f262b797 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
@@ -10,7 +10,6 @@
  * and check it can be retrieved with KVM_GET_MSR, also test
  * the invalid LBR formats are rejected.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include <linux/bitmap.h>
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
index affc32800158..00dd2ac07a61 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
@@ -9,7 +9,6 @@
  * value instead of partially decayed timer value
  *
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
index 725c206ba0b9..c78e5f755116 100644
--- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
@@ -19,8 +19,6 @@
  * Migration is a command line option. When used on non-numa machines will 
  * exit with error. Test is still usefull on non-numa for testing IPIs.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <getopt.h>
 #include <pthread.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
index ab75b873a4ad..69849acd95b0 100644
--- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
index 167c97abff1b..f331a4e9bae3 100644
--- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
@@ -4,8 +4,6 @@
  *
  * Tests for the IA32_XSS MSR.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
index a6f89aaea77d..bdb3955a9452 100644
--- a/tools/testing/selftests/landlock/base_test.c
+++ b/tools/testing/selftests/landlock/base_test.c
@@ -5,8 +5,6 @@
  * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
  * Copyright © 2019-2020 ANSSI
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/landlock.h>
diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 9a6036fbf289..acec1c82c8b4 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -6,8 +6,6 @@
  * Copyright © 2020 ANSSI
  * Copyright © 2020-2022 Microsoft Corporation
  */
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <linux/landlock.h>
 #include <linux/magic.h>
diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
index f21cfbbc3638..eed040adcbac 100644
--- a/tools/testing/selftests/landlock/net_test.c
+++ b/tools/testing/selftests/landlock/net_test.c
@@ -5,8 +5,6 @@
  * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
  * Copyright © 2023 Microsoft Corporation
  */
-
-#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
index a19db4d0b3bd..c831e6d03b02 100644
--- a/tools/testing/selftests/landlock/ptrace_test.c
+++ b/tools/testing/selftests/landlock/ptrace_test.c
@@ -5,8 +5,6 @@
  * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
  * Copyright © 2019-2020 ANSSI
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/landlock.h>
diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
index 9ad258912646..1b18aac570f1 100644
--- a/tools/testing/selftests/lsm/common.c
+++ b/tools/testing/selftests/lsm/common.c
@@ -4,8 +4,6 @@
  *
  * Copyright © 2023 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
index df215e4aa63f..7465bde3f922 100644
--- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
index 06d24d4679a6..a6b44e25c21f 100644
--- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
+++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
index 66dec47e3ca3..110c6a07e74c 100644
--- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
index af89855adb7b..a8a60b6271a5 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
+++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
@@ -1,5 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
index a9cc17facfb3..b4651e2ade00 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
index 4cdc8b1d124c..17ae5199b916 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
index 8eb3d75f6e60..879d4f4c66fa 100644
--- a/tools/testing/selftests/memfd/common.c
+++ b/tools/testing/selftests/memfd/common.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <stdio.h>
diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
index 93798c8c5d54..15bc189bf831 100644
--- a/tools/testing/selftests/memfd/fuse_test.c
+++ b/tools/testing/selftests/memfd/fuse_test.c
@@ -12,8 +12,6 @@
  * the read() syscall with our memory-mapped memfd object as receive buffer to
  * force the kernel to write into our memfd object.
  */
-
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <errno.h>
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index 18f585684e20..5172c27a8748 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <errno.h>
diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
index 363bf5f801be..6f1a36d51f19 100644
--- a/tools/testing/selftests/mm/cow.c
+++ b/tools/testing/selftests/mm/cow.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
index ad168d35b23b..3bfd5a630081 100644
--- a/tools/testing/selftests/mm/gup_longterm.c
+++ b/tools/testing/selftests/mm/gup_longterm.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
index 267eea2e0e0b..edb46888222f 100644
--- a/tools/testing/selftests/mm/hugepage-mmap.c
+++ b/tools/testing/selftests/mm/hugepage-mmap.c
@@ -16,7 +16,6 @@
  * range.
  * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
index c463d1c09c9b..8e22822bb754 100644
--- a/tools/testing/selftests/mm/hugepage-mremap.c
+++ b/tools/testing/selftests/mm/hugepage-mremap.c
@@ -11,8 +11,6 @@
  * To make sure the test triggers pmd sharing and goes through the 'unshare'
  * path in the mremap code use 1GB (1024) or more.
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
index e74107185324..70c40c67bc5d 100644
--- a/tools/testing/selftests/mm/hugetlb-madvise.c
+++ b/tools/testing/selftests/mm/hugetlb-madvise.c
@@ -11,8 +11,6 @@
  * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
  * directory.
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
index ba6cc6f9cabc..6b8b41b4f754 100644
--- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
+++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
index 829320a519e7..d18bf400dae6 100644
--- a/tools/testing/selftests/mm/khugepaged.c
+++ b/tools/testing/selftests/mm/khugepaged.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
index d615767e396b..1deae905c42e 100644
--- a/tools/testing/selftests/mm/ksm_functional_tests.c
+++ b/tools/testing/selftests/mm/ksm_functional_tests.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
index 17bcb07f19f3..d19ad13ffd7e 100644
--- a/tools/testing/selftests/mm/madv_populate.c
+++ b/tools/testing/selftests/mm/madv_populate.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
index 5c8a53869b1b..ff4d4079bd0e 100644
--- a/tools/testing/selftests/mm/map_populate.c
+++ b/tools/testing/selftests/mm/map_populate.c
@@ -4,8 +4,6 @@
  *
  * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/mman.h>
diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
index 1e01d3ddc11c..200bedcdc32e 100644
--- a/tools/testing/selftests/mm/mdwe_test.c
+++ b/tools/testing/selftests/mm/mdwe_test.c
@@ -7,7 +7,6 @@
 #include <linux/mman.h>
 #include <linux/prctl.h>
 
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/auxv.h>
diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
index 9b298f6a04b3..750adede2816 100644
--- a/tools/testing/selftests/mm/memfd_secret.c
+++ b/tools/testing/selftests/mm/memfd_secret.c
@@ -4,8 +4,6 @@
  *
  * Author: Mike Rapoport <rppt@linux.ibm.com>
  */
-
-#define _GNU_SOURCE
 #include <sys/uio.h>
 #include <sys/mman.h>
 #include <sys/wait.h>
diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
index 26f744188ad0..42574290d728 100644
--- a/tools/testing/selftests/mm/mlock2-tests.c
+++ b/tools/testing/selftests/mm/mlock2-tests.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sys/mman.h>
 #include <stdint.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
index 100370a7111d..d78bf686e99f 100644
--- a/tools/testing/selftests/mm/mrelease_test.c
+++ b/tools/testing/selftests/mm/mrelease_test.c
@@ -2,7 +2,6 @@
 /*
  * Copyright 2022 Google LLC
  */
-#define _GNU_SOURCE
 #include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
index 1d75084b9ca5..934fa6b441b2 100644
--- a/tools/testing/selftests/mm/mremap_dontunmap.c
+++ b/tools/testing/selftests/mm/mremap_dontunmap.c
@@ -5,7 +5,6 @@
  *
  * Copyright 2020, Brian Geffon <bgeffon@google.com>
  */
-#define _GNU_SOURCE
 #include <sys/mman.h>
 #include <linux/mman.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
index 2f8b991f78cb..e057154630e0 100644
--- a/tools/testing/selftests/mm/mremap_test.c
+++ b/tools/testing/selftests/mm/mremap_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright 2020 Google LLC
  */
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index d59517ed3d48..2a18b5d276f0 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
index 1af3156a9db8..37d6b01ce90a 100644
--- a/tools/testing/selftests/mm/pkey-helpers.h
+++ b/tools/testing/selftests/mm/pkey-helpers.h
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PKEYS_HELPER_H
 #define _PKEYS_HELPER_H
-#define _GNU_SOURCE
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
index 48dc151f8fca..9f7de92caeda 100644
--- a/tools/testing/selftests/mm/protection_keys.c
+++ b/tools/testing/selftests/mm/protection_keys.c
@@ -21,7 +21,6 @@
  *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
  *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
  */
-#define _GNU_SOURCE
 #define __SANE_USERSPACE_TYPES__
 #include <errno.h>
 #include <linux/elf.h>
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index d3c7f5fb3e7b..ae6ac950d7a1 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -3,8 +3,6 @@
  * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
  * address range in a process via <debugfs>/split_huge_pages interface.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
index ea7fd8fe2876..28a5c31bd791 100644
--- a/tools/testing/selftests/mm/thuge-gen.c
+++ b/tools/testing/selftests/mm/thuge-gen.c
@@ -12,8 +12,6 @@
    ipcrm -m by hand, like this
    sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
    (warning this will remove all if someone else uses them) */
-
-#define _GNU_SOURCE 1
 #include <sys/mman.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
index cc5629c3d2aa..abb44319264a 100644
--- a/tools/testing/selftests/mm/uffd-common.h
+++ b/tools/testing/selftests/mm/uffd-common.h
@@ -7,7 +7,6 @@
 #ifndef __UFFD_COMMON_H__
 #define __UFFD_COMMON_H__
 
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
index c6a8c732b802..d894417134b6 100644
--- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
+++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
index bcf51d785a37..bd975670f61d 100644
--- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
+++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
index 79a3dd75590e..279d0c5f70d3 100644
--- a/tools/testing/selftests/net/af_unix/diag_uid.c
+++ b/tools/testing/selftests/net/af_unix/diag_uid.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright Amazon.com Inc. or its affiliates. */
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <unistd.h>
diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
index 7e534594167e..2986b8cd0418 100644
--- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
+++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0 OR MIT
-#define _GNU_SOURCE
 #include <error.h>
 #include <limits.h>
 #include <stddef.h>
diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
index d799fd8f5c7c..34e816862cc7 100644
--- a/tools/testing/selftests/net/af_unix/unix_connect.c
+++ b/tools/testing/selftests/net/af_unix/unix_connect.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <stddef.h>
diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
index 90eb06fefa59..8262aa862331 100644
--- a/tools/testing/selftests/net/csum.c
+++ b/tools/testing/selftests/net/csum.c
@@ -58,9 +58,6 @@
  * different seed for each run (and logs this for reproducibility). It
  * is advised to enable this for extra coverage in continuous testing.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/byteorder.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
index 353e1e867fbb..f5d7032e6466 100644
--- a/tools/testing/selftests/net/gro.c
+++ b/tools/testing/selftests/net/gro.c
@@ -34,9 +34,6 @@
  * flakiness is to be expected.
  *
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
index f9ed749fd8c7..80c9e567a3d8 100644
--- a/tools/testing/selftests/net/ip_defrag.c
+++ b/tools/testing/selftests/net/ip_defrag.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
index be4a30a0d02a..04aa06d26b09 100644
--- a/tools/testing/selftests/net/ipsec.c
+++ b/tools/testing/selftests/net/ipsec.c
@@ -3,9 +3,6 @@
  * ipsec.c - Check xfrm on veth inside a net-ns.
  * Copyright (c) 2018 Dmitry Safonov
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/types.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
index 708a9822259d..b7e0c3c02e20 100644
--- a/tools/testing/selftests/net/ipv6_flowlabel.c
+++ b/tools/testing/selftests/net/ipv6_flowlabel.c
@@ -1,8 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Test IPV6_FLOWINFO cmsg on send and recv */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/byteorder.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
index af95b48acea9..ebd219ba386e 100644
--- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
+++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
@@ -1,8 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Test IPV6_FLOWINFO_MGR */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
index d2043ec3bf6d..ea93030ed3ec 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <limits.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
index 218aac467321..c5bf873d76c2 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
index 926b0be87c99..7203ca9900e9 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
index bdc03a2097e8..9278bf585c80 100644
--- a/tools/testing/selftests/net/msg_zerocopy.c
+++ b/tools/testing/selftests/net/msg_zerocopy.c
@@ -24,9 +24,6 @@
  * the kernel queues completions on the error queue for all zerocopy
  * transfers.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
index cd8a58097448..88e1d3b2ddf1 100644
--- a/tools/testing/selftests/net/nettest.c
+++ b/tools/testing/selftests/net/nettest.c
@@ -3,8 +3,6 @@
  *
  * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
  */
-
-#define _GNU_SOURCE
 #include <features.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
index 1a736f700be4..5b2d34440ae9 100644
--- a/tools/testing/selftests/net/psock_fanout.c
+++ b/tools/testing/selftests/net/psock_fanout.c
@@ -26,9 +26,6 @@
  * Todo:
  * - functionality: PACKET_FANOUT_FLAG_DEFRAG
  */
-
-#define _GNU_SOURCE		/* for sched_setaffinity */
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
index edf1e6f80d41..2f29b513e18f 100644
--- a/tools/testing/selftests/net/psock_snd.c
+++ b/tools/testing/selftests/net/psock_snd.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
index b8475cb29be7..9ee6ece52865 100644
--- a/tools/testing/selftests/net/reuseport_addr_any.c
+++ b/tools/testing/selftests/net/reuseport_addr_any.c
@@ -3,9 +3,6 @@
 /* Test that sockets listening on a specific address are preferred
  * over sockets listening on addr_any.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
index 2d646174729f..e93e38cfb2a8 100644
--- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
+++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
@@ -11,9 +11,6 @@
  * This entire process is done for several different core id permutations
  * and for each IPv4/IPv6 and TCP/UDP combination.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
index c9ba36aa688e..502fdb9ce770 100644
--- a/tools/testing/selftests/net/reuseport_bpf_numa.c
+++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
@@ -3,9 +3,6 @@
  * Test functionality of BPF filters with SO_REUSEPORT. Same test as
  * in reuseport_bpf_cpu, only as one socket per NUMA node.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
index fb7a59ed759e..d3c3d3f39f8f 100644
--- a/tools/testing/selftests/net/reuseport_dualstack.c
+++ b/tools/testing/selftests/net/reuseport_dualstack.c
@@ -10,9 +10,6 @@
  * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
  * AF_INET preference for v4 packets.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
index e9fa14e10732..95bd0cdc3253 100644
--- a/tools/testing/selftests/net/so_incoming_cpu.c
+++ b/tools/testing/selftests/net/so_incoming_cpu.c
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright Amazon.com Inc. or its affiliates. */
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
index b39e87e967cd..18532d564f79 100644
--- a/tools/testing/selftests/net/so_netns_cookie.c
+++ b/tools/testing/selftests/net/so_netns_cookie.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
index 8457b7ccbc09..011a24af9786 100644
--- a/tools/testing/selftests/net/so_txtime.c
+++ b/tools/testing/selftests/net/so_txtime.c
@@ -9,9 +9,6 @@
  * the expected stream. Sender will read transmit timestamps from the error
  * queue. The streams can differ due to out-of-order delivery and drops.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
index 247c3b3ac1c9..fa78b92d9740 100644
--- a/tools/testing/selftests/net/tap.c
+++ b/tools/testing/selftests/net/tap.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
index c1cb0c75156a..d30f89bb944c 100644
--- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
+++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
@@ -12,7 +12,6 @@
  * there are no cases in which a cookie is not accepted by verifying
  * that TcpExtTCPFastOpenPassiveFail remains 0.
  */
-#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
index bd6a9c7a3e8a..71ee145f151e 100644
--- a/tools/testing/selftests/net/tcp_inq.c
+++ b/tools/testing/selftests/net/tcp_inq.c
@@ -5,8 +5,6 @@
  *
  * Simple example on how to use TCP_INQ and TCP_CM_INQ.
  */
-#define _GNU_SOURCE
-
 #include <error.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
index 4fcce5150850..72d5f1207ee0 100644
--- a/tools/testing/selftests/net/tcp_mmap.c
+++ b/tools/testing/selftests/net/tcp_mmap.c
@@ -46,7 +46,6 @@
  * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
  *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
  */
-#define _GNU_SOURCE
 #include <pthread.h>
 #include <sys/types.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index f27a12d2a2c9..6dbad97d1d0a 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
index 9ba03164d73a..e2d739892ce4 100644
--- a/tools/testing/selftests/net/toeplitz.c
+++ b/tools/testing/selftests/net/toeplitz.c
@@ -20,9 +20,6 @@
  * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
  * 6. Compare the cpus from 4 and 5
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
index fa83918b62d1..a64dcfb242c1 100644
--- a/tools/testing/selftests/net/tun.c
+++ b/tools/testing/selftests/net/tun.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
index 7d9ea039450a..96972e0110a0 100644
--- a/tools/testing/selftests/net/txring_overwrite.c
+++ b/tools/testing/selftests/net/txring_overwrite.c
@@ -4,9 +4,6 @@
  * Verify that consecutive sends over packet tx_ring are mirrored
  * with their original content intact.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <assert.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
index ec60a16c9307..33dba9e90dea 100644
--- a/tools/testing/selftests/net/txtimestamp.c
+++ b/tools/testing/selftests/net/txtimestamp.c
@@ -16,9 +16,6 @@
  * This test requires a dummy TCP server.
  * A simple `nc6 [-u] -l -p $DESTPORT` will do
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/types.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
index 85b3baa3f7f3..9dc1026a033a 100644
--- a/tools/testing/selftests/net/udpgso.c
+++ b/tools/testing/selftests/net/udpgso.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <stddef.h>
 #include <arpa/inet.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
index 1cbadd267c96..999df1236320 100644
--- a/tools/testing/selftests/net/udpgso_bench_rx.c
+++ b/tools/testing/selftests/net/udpgso_bench_rx.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
index 477392715a9a..d7632993b354 100644
--- a/tools/testing/selftests/net/udpgso_bench_tx.c
+++ b/tools/testing/selftests/net/udpgso_bench_tx.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
index 5814611a1dc7..ef4d923f4759 100644
--- a/tools/testing/selftests/perf_events/remove_on_exec.c
+++ b/tools/testing/selftests/perf_events/remove_on_exec.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2021, Google LLC.
  */
 
-#define _GNU_SOURCE
-
 /* We need the latest siginfo from the kernel repo. */
 #include <sys/types.h>
 #include <asm/siginfo.h>
diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
index d1d8483ac628..14d1a3c8cb5c 100644
--- a/tools/testing/selftests/perf_events/sigtrap_threads.c
+++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2021, Google LLC.
  */
 
-#define _GNU_SOURCE
-
 /* We need the latest siginfo from the kernel repo. */
 #include <sys/types.h>
 #include <asm/siginfo.h>
diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
index 7d84097ad45c..54dc8f16d92a 100644
--- a/tools/testing/selftests/pid_namespace/regression_enomem.c
+++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
index 88d6830ee004..e33177b1aa41 100644
--- a/tools/testing/selftests/pidfd/pidfd.h
+++ b/tools/testing/selftests/pidfd/pidfd.h
@@ -3,7 +3,6 @@
 #ifndef __PIDFD_H
 #define __PIDFD_H
 
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
index 01cc37bf611c..67c9dc436c71 100644
--- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
index cd51d547b751..b6a0e9b3d2f5 100644
--- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
index 8a59438ccc78..781a3931fb5a 100644
--- a/tools/testing/selftests/pidfd/pidfd_open_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
index 610811275357..a40fb27a78bb 100644
--- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <poll.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
index 6e2f2cd400ca..49d7a78cc4fe 100644
--- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
index c081ae91313a..c3d52406b8fd 100644
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
index 0dcb8365ddc3..54beba0983f1 100644
--- a/tools/testing/selftests/pidfd/pidfd_wait.c
+++ b/tools/testing/selftests/pidfd/pidfd_wait.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
index 5297b10d25c3..054a78ebe8b5 100644
--- a/tools/testing/selftests/ptrace/get_set_sud.c
+++ b/tools/testing/selftests/ptrace/get_set_sud.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include "../kselftest_harness.h"
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
index a6884f66dc01..1b7b77190f72 100644
--- a/tools/testing/selftests/ptrace/peeksiginfo.c
+++ b/tools/testing/selftests/ptrace/peeksiginfo.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <signal.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
index 2348d2c20d0a..5961c24ee1ae 100644
--- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
+++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: LGPL-2.1
-#define _GNU_SOURCE
 #include <assert.h>
 #include <pthread.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
index 295eea16466f..1fed749b4bd7 100644
--- a/tools/testing/selftests/rseq/basic_test.c
+++ b/tools/testing/selftests/rseq/basic_test.c
@@ -2,8 +2,6 @@
 /*
  * Basic test coverage for critical regions and rseq_current_cpu().
  */
-
-#define _GNU_SOURCE
 #include <assert.h>
 #include <sched.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
index 2f37961240ca..48a55d94eb72 100644
--- a/tools/testing/selftests/rseq/param_test.c
+++ b/tools/testing/selftests/rseq/param_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: LGPL-2.1
-#define _GNU_SOURCE
 #include <assert.h>
 #include <linux/membarrier.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
index 96e812bdf8a4..88602889414c 100644
--- a/tools/testing/selftests/rseq/rseq.c
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -14,8 +14,6 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <sched.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
index b83099160fbc..3632a4890da9 100644
--- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
+++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
@@ -2,7 +2,6 @@
  * Strictly speaking, this is not a test. But it can report during test
  * runs so relative performace can be measured.
  */
-#define _GNU_SOURCE
 #include <assert.h>
 #include <err.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index 783ebce8c4de..972ccc12553e 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -4,8 +4,6 @@
  *
  * Test code for seccomp bpf.
  */
-
-#define _GNU_SOURCE
 #include <sys/types.h>
 
 /*
diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
index 7288a05136ba..a1f156dbbd56 100644
--- a/tools/testing/selftests/user_events/abi_test.c
+++ b/tools/testing/selftests/user_events/abi_test.c
@@ -4,8 +4,6 @@
  *
  * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
  */
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <errno.h>
diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
index d884fd69dd51..9441635fc452 100644
--- a/tools/testing/selftests/x86/amx.c
+++ b/tools/testing/selftests/x86/amx.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <errno.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
index 3bc95f3ed585..0129cdae8abe 100644
--- a/tools/testing/selftests/x86/check_initial_reg_state.c
+++ b/tools/testing/selftests/x86/check_initial_reg_state.c
@@ -3,9 +3,6 @@
  * check_initial_reg_state.c - check that execve sets the correct state
  * Copyright (c) 2014-2016 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdio.h>
 
 unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
index cf9ce8fbb656..d2c746149678 100644
--- a/tools/testing/selftests/x86/corrupt_xstate_header.c
+++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
@@ -4,9 +4,6 @@
  *
  * Based on analysis and a test case from Thomas Gleixner.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
index d1e919b0c1dc..9fa9d4a847ac 100644
--- a/tools/testing/selftests/x86/entry_from_vm86.c
+++ b/tools/testing/selftests/x86/entry_from_vm86.c
@@ -5,9 +5,6 @@
  *
  * This exercises a few paths that need to special-case vm86 mode.
  */
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
index 8c780cce941d..348134d2cefc 100644
--- a/tools/testing/selftests/x86/fsgsbase.c
+++ b/tools/testing/selftests/x86/fsgsbase.c
@@ -3,8 +3,6 @@
  * fsgsbase.c, an fsgsbase test
  * Copyright (c) 2014-2016 Andy Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
index 6fffadc51579..88dce47ab8e6 100644
--- a/tools/testing/selftests/x86/fsgsbase_restore.c
+++ b/tools/testing/selftests/x86/fsgsbase_restore.c
@@ -12,8 +12,6 @@
  *
  * This is not part of fsgsbase.c, because that test is 64-bit only.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
index 57ec5e99edb9..07b7c10f8d39 100644
--- a/tools/testing/selftests/x86/ioperm.c
+++ b/tools/testing/selftests/x86/ioperm.c
@@ -3,8 +3,6 @@
  * ioperm.c - Test case for ioperm(2)
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
index 7e3e09c1abac..baa691154905 100644
--- a/tools/testing/selftests/x86/iopl.c
+++ b/tools/testing/selftests/x86/iopl.c
@@ -3,8 +3,6 @@
  * iopl.c - Test case for a Linux on Xen 64-bit bug
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
index 215b8150b7cc..39edfd7f6037 100644
--- a/tools/testing/selftests/x86/lam.c
+++ b/tools/testing/selftests/x86/lam.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
index 3a29346e1452..3b4237a85a12 100644
--- a/tools/testing/selftests/x86/ldt_gdt.c
+++ b/tools/testing/selftests/x86/ldt_gdt.c
@@ -3,8 +3,6 @@
  * ldt_gdt.c - Test cases for LDT and GDT access
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
index cc3de6ff9fba..47ecc63220b7 100644
--- a/tools/testing/selftests/x86/mov_ss_trap.c
+++ b/tools/testing/selftests/x86/mov_ss_trap.c
@@ -19,8 +19,6 @@
  *
  * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
  */
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <sys/ptrace.h>
 #include <sys/types.h>
diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
index ea4a4e246879..97c5b34096cc 100644
--- a/tools/testing/selftests/x86/nx_stack.c
+++ b/tools/testing/selftests/x86/nx_stack.c
@@ -23,8 +23,6 @@
  * Regular stack is completely overwritten before testing.
  * Test doesn't exit SIGSEGV handler after first fault at INT3.
  */
-#undef _GNU_SOURCE
-#define _GNU_SOURCE
 #undef NDEBUG
 #include <assert.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
index 12aaa063196e..bdc81c8bd1a7 100644
--- a/tools/testing/selftests/x86/ptrace_syscall.c
+++ b/tools/testing/selftests/x86/ptrace_syscall.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <sys/ptrace.h>
 #include <sys/types.h>
 #include <sys/wait.h>
diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
index f689af75e979..7f41c3a4268b 100644
--- a/tools/testing/selftests/x86/sigaltstack.c
+++ b/tools/testing/selftests/x86/sigaltstack.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-
-#define _GNU_SOURCE
 #include <signal.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
index 5d7961a5f7f6..2054f729b2c2 100644
--- a/tools/testing/selftests/x86/sigreturn.c
+++ b/tools/testing/selftests/x86/sigreturn.c
@@ -24,9 +24,6 @@
  *
  * Do not run on outdated, unpatched kernels at risk of nasty crashes.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/time.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
index 9a30f443e928..375f3b50a0b5 100644
--- a/tools/testing/selftests/x86/single_step_syscall.c
+++ b/tools/testing/selftests/x86/single_step_syscall.c
@@ -9,9 +9,6 @@
  * immediately issues #DB from CPL 0.  This requires special handling in
  * the kernel.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/time.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
index 461fa41a4d02..10eee1bcd015 100644
--- a/tools/testing/selftests/x86/syscall_arg_fault.c
+++ b/tools/testing/selftests/x86/syscall_arg_fault.c
@@ -3,9 +3,6 @@
  * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
index 991591718bb0..c72fc8aaa4d3 100644
--- a/tools/testing/selftests/x86/syscall_numbering.c
+++ b/tools/testing/selftests/x86/syscall_numbering.c
@@ -5,9 +5,6 @@
  *
  * Copyright (c) 2018 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
index 84d74be1d902..24bc219358a5 100644
--- a/tools/testing/selftests/x86/sysret_rip.c
+++ b/tools/testing/selftests/x86/sysret_rip.c
@@ -3,9 +3,6 @@
  * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
  * Copyright (c) 2014-2016 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
index 5f3d4fca440f..f8b9e0b2a0c5 100644
--- a/tools/testing/selftests/x86/sysret_ss_attrs.c
+++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
@@ -7,9 +7,6 @@
  * the hidden attributes set to an unusable state.  Make sure the kernel
  * doesn't let this happen.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
index 6b5036fbb735..0c9431ba7d31 100644
--- a/tools/testing/selftests/x86/test_FCMOV.c
+++ b/tools/testing/selftests/x86/test_FCMOV.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
index aec6692c6dcf..ba186665918d 100644
--- a/tools/testing/selftests/x86/test_FCOMI.c
+++ b/tools/testing/selftests/x86/test_FCOMI.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
index 09789c0ce3e9..95580cdaaa32 100644
--- a/tools/testing/selftests/x86/test_FISTTP.c
+++ b/tools/testing/selftests/x86/test_FISTTP.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
index f0d876d48277..a8bdba356682 100644
--- a/tools/testing/selftests/x86/test_mremap_vdso.c
+++ b/tools/testing/selftests/x86/test_mremap_vdso.c
@@ -9,7 +9,6 @@
  * Can be built statically:
  * gcc -Os -Wall -static -m32 test_mremap_vdso.c
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
index 757e6527f67e..0ceca9064cec 100644
--- a/tools/testing/selftests/x86/test_shadow_stack.c
+++ b/tools/testing/selftests/x86/test_shadow_stack.c
@@ -7,9 +7,6 @@
  * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
  * stick to the basics and hope the compiler doesn't do anything strange.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/syscall.h>
 #include <asm/mman.h>
 #include <sys/mman.h>
diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
index 8965c311bd65..5cd13279bba5 100644
--- a/tools/testing/selftests/x86/test_syscall_vdso.c
+++ b/tools/testing/selftests/x86/test_syscall_vdso.c
@@ -8,10 +8,6 @@
  * Can be built statically:
  * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
  */
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index 47cab972807c..cbf4e5012005 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -1,7 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <sys/time.h>
 #include <time.h>
diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
index 4c311e1af4c7..754f5d4d425a 100644
--- a/tools/testing/selftests/x86/unwind_vdso.c
+++ b/tools/testing/selftests/x86/unwind_vdso.c
@@ -5,9 +5,6 @@
  *
  * This tests __kernel_vsyscall's unwind info.
  */
-
-#define _GNU_SOURCE
-
 #include <features.h>
 #include <stdio.h>
 
diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
index fe99f2434155..8193de22a390 100644
--- a/tools/testing/selftests/x86/vdso_restorer.c
+++ b/tools/testing/selftests/x86/vdso_restorer.c
@@ -10,9 +10,6 @@
  * 64-bit userspace has never supported sa_restorer == NULL, so this is
  * 32-bit only.
  */
-
-#define _GNU_SOURCE
-
 #include <err.h>
 #include <stdio.h>
 #include <dlfcn.h>
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Edward Liaw]

_GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
prevent _GNU_SOURCE redefined warnings.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
 tools/testing/selftests/capabilities/test_execve.c            | 2 --
 tools/testing/selftests/clone3/clone3.c                       | 2 --
 .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
 tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
 tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
 tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
 tools/testing/selftests/core/close_range_test.c               | 2 --
 tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
 tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
 tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
 tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
 tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
 tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
 tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
 tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
 tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
 .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
 tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
 tools/testing/selftests/ipc/msgque.c                          | 1 -
 tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
 tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
 tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
 tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
 tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
 tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
 tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
 tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
 tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
 tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
 tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
 tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
 tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
 tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
 tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
 tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
 tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
 tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
 tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
 .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
 tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
 tools/testing/selftests/kvm/rseq_test.c                       | 1 -
 tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
 tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
 tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
 tools/testing/selftests/kvm/steal_time.c                      | 1 -
 tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
 tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
 .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
 tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
 .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
 tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
 tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
 tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
 tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
 tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
 .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
 tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
 tools/testing/selftests/landlock/base_test.c                  | 2 --
 tools/testing/selftests/landlock/fs_test.c                    | 2 --
 tools/testing/selftests/landlock/net_test.c                   | 2 --
 tools/testing/selftests/landlock/ptrace_test.c                | 2 --
 tools/testing/selftests/lsm/common.c                          | 2 --
 tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
 tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
 tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
 tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
 .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
 .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
 tools/testing/selftests/memfd/common.c                        | 1 -
 tools/testing/selftests/memfd/fuse_test.c                     | 2 --
 tools/testing/selftests/memfd/memfd_test.c                    | 1 -
 tools/testing/selftests/mm/cow.c                              | 1 -
 tools/testing/selftests/mm/gup_longterm.c                     | 1 -
 tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
 tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
 tools/testing/selftests/mm/khugepaged.c                       | 1 -
 tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
 tools/testing/selftests/mm/madv_populate.c                    | 1 -
 tools/testing/selftests/mm/map_populate.c                     | 2 --
 tools/testing/selftests/mm/mdwe_test.c                        | 1 -
 tools/testing/selftests/mm/memfd_secret.c                     | 2 --
 tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
 tools/testing/selftests/mm/mrelease_test.c                    | 1 -
 tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
 tools/testing/selftests/mm/mremap_test.c                      | 2 --
 tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
 tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
 tools/testing/selftests/mm/protection_keys.c                  | 1 -
 tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
 tools/testing/selftests/mm/thuge-gen.c                        | 2 --
 tools/testing/selftests/mm/uffd-common.h                      | 1 -
 tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
 .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
 tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
 tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
 tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
 tools/testing/selftests/net/csum.c                            | 3 ---
 tools/testing/selftests/net/gro.c                             | 3 ---
 tools/testing/selftests/net/ip_defrag.c                       | 3 ---
 tools/testing/selftests/net/ipsec.c                           | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
 tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
 tools/testing/selftests/net/nettest.c                         | 2 --
 tools/testing/selftests/net/psock_fanout.c                    | 3 ---
 tools/testing/selftests/net/psock_snd.c                       | 3 ---
 tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
 tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
 tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
 tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
 tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
 tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
 tools/testing/selftests/net/so_txtime.c                       | 3 ---
 tools/testing/selftests/net/tap.c                             | 3 ---
 tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
 tools/testing/selftests/net/tcp_inq.c                         | 2 --
 tools/testing/selftests/net/tcp_mmap.c                        | 1 -
 tools/testing/selftests/net/tls.c                             | 3 ---
 tools/testing/selftests/net/toeplitz.c                        | 3 ---
 tools/testing/selftests/net/tun.c                             | 3 ---
 tools/testing/selftests/net/txring_overwrite.c                | 3 ---
 tools/testing/selftests/net/txtimestamp.c                     | 3 ---
 tools/testing/selftests/net/udpgso.c                          | 3 ---
 tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
 tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
 tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
 tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
 tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
 tools/testing/selftests/pidfd/pidfd.h                         | 1 -
 tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
 tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
 tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
 tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
 tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
 tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
 tools/testing/selftests/rseq/basic_test.c                     | 2 --
 tools/testing/selftests/rseq/param_test.c                     | 1 -
 tools/testing/selftests/rseq/rseq.c                           | 2 --
 tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
 tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
 tools/testing/selftests/user_events/abi_test.c                | 2 --
 tools/testing/selftests/x86/amx.c                             | 2 --
 tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
 tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
 tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
 tools/testing/selftests/x86/fsgsbase.c                        | 2 --
 tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
 tools/testing/selftests/x86/ioperm.c                          | 2 --
 tools/testing/selftests/x86/iopl.c                            | 2 --
 tools/testing/selftests/x86/lam.c                             | 1 -
 tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
 tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
 tools/testing/selftests/x86/nx_stack.c                        | 2 --
 tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
 tools/testing/selftests/x86/sigaltstack.c                     | 2 --
 tools/testing/selftests/x86/sigreturn.c                       | 3 ---
 tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
 tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
 tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
 tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
 tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
 tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
 tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
 tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
 tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
 tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
 tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
 tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
 tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
 tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
 198 files changed, 405 deletions(-)

diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
index b171fd53b004..c1a6ce7b0912 100644
--- a/tools/testing/selftests/cachestat/test_cachestat.c
+++ b/tools/testing/selftests/cachestat/test_cachestat.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdbool.h>
 #include <linux/kernel.h>
diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
index 7cde07a5df78..e3954b88c3ee 100644
--- a/tools/testing/selftests/capabilities/test_execve.c
+++ b/tools/testing/selftests/capabilities/test_execve.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <cap-ng.h>
 #include <linux/capability.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 3c9bf0cd82a8..3c5e45dae617 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
 /* Based on Christian Brauner's clone3() example */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <inttypes.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
index 31b56d625655..bb99ea20f7d5 100644
--- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
+++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
@@ -7,8 +7,6 @@
  */
 
 /* capabilities related code based on selftests/bpf/test_verifier.c */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <linux/sched.h>
diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
index 54a8b2445be9..50336d56db6b 100644
--- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
+++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <sched.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
index 3d2663fe50ba..172e19d5515f 100644
--- a/tools/testing/selftests/clone3/clone3_selftests.h
+++ b/tools/testing/selftests/clone3/clone3_selftests.h
@@ -3,7 +3,6 @@
 #ifndef _CLONE3_SELFTESTS_H
 #define _CLONE3_SELFTESTS_H
 
-#define _GNU_SOURCE
 #include <sched.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
index ed785afb6077..8b5ed4484ee6 100644
--- a/tools/testing/selftests/clone3/clone3_set_tid.c
+++ b/tools/testing/selftests/clone3/clone3_set_tid.c
@@ -5,8 +5,6 @@
  * These tests are assuming to be running in the host's
  * PID namespace.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <linux/sched.h>
diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
index c59e4adb905d..1c2902bcc913 100644
--- a/tools/testing/selftests/core/close_range_test.c
+++ b/tools/testing/selftests/core/close_range_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/kernel.h>
diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
index c812080e304e..7c8dbab8ac44 100644
--- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
+++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <stdio.h>
diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
index e0319417124d..6b411859c2cd 100644
--- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
+++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
index 5f362c0fd890..fca693db1b09 100644
--- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
+++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
index b1fc9b916ace..73766447eeb0 100644
--- a/tools/testing/selftests/filesystems/devpts_pts.c
+++ b/tools/testing/selftests/filesystems/devpts_pts.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
index c0a9b2d3302d..05367a70b963 100644
--- a/tools/testing/selftests/filesystems/dnotify_test.c
+++ b/tools/testing/selftests/filesystems/dnotify_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE	/* needed to get the defines */
 #include <fcntl.h>	/* in glibc 2.2 this has the needed
 				   values defined */
 #include <signal.h>
diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
index 65ede506305c..9bc2ddad7e92 100644
--- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
+++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <asm/unistd.h>
 #include <linux/time_types.h>
 #include <poll.h>
diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
index f142a137526c..17935f42fbc9 100644
--- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
+++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <asm/unistd.h>
diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
index e488ad354fce..56cf3ad8640d 100644
--- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
+++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
@@ -6,8 +6,6 @@
  * Copyright 2022 Red Hat Inc.
  * Author: Javier Martinez Canillas <javierm@redhat.com>
  */
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
index 759f86e7d263..b58a80bde95a 100644
--- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
+++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <inttypes.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
index 3eafd7da58e2..d1cefd1b7d16 100644
--- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
+++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <stdint.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
index 7f3ca5c78df1..8e41f9fe784c 100644
--- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
+++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
@@ -16,9 +16,6 @@
  *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
  *
  *****************************************************************************/
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <limits.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
index 656c43c24044..291c81d59a9d 100644
--- a/tools/testing/selftests/ipc/msgque.c
+++ b/tools/testing/selftests/ipc/msgque.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
index 25110c7c0b3e..885c9e943cee 100644
--- a/tools/testing/selftests/kcmp/kcmp_test.c
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
index 4eaba83cdcf3..5369959e9fc2 100644
--- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
+++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
@@ -5,8 +5,6 @@
  *
  * Copyright (c) 2021, Google LLC.
  */
-#define _GNU_SOURCE
-
 #include "arch_timer.h"
 #include "delay.h"
 #include "gic.h"
diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
index 5972905275cf..79e99f47a9fe 100644
--- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
+++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
@@ -7,7 +7,6 @@
  * hugetlbfs with a hole). It checks that the expected handling method is
  * called (e.g., uffd faults with the right address and write/read flag).
  */
-#define _GNU_SOURCE
 #include <linux/bitmap.h>
 #include <fcntl.h>
 #include <test_util.h>
diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
index 9b004905d1d3..1c8c6f0c1ca3 100644
--- a/tools/testing/selftests/kvm/aarch64/psci_test.c
+++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
@@ -10,9 +10,6 @@
  *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
  *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
  */
-
-#define _GNU_SOURCE
-
 #include <linux/psci.h>
 
 #include "kvm_util.h"
diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
index ca917c71ff60..b3b5fb0ff0a9 100644
--- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
+++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE
 #include <linux/kernel.h>
 #include <sys/syscall.h>
 #include <asm/kvm.h>
diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
index ae1f1a6d8312..fcebd8d81ce4 100644
--- a/tools/testing/selftests/kvm/arch_timer.c
+++ b/tools/testing/selftests/kvm/arch_timer.c
@@ -19,9 +19,6 @@
  *
  * Copyright (c) 2021, Google LLC.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <pthread.h>
 #include <linux/sizes.h>
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index bf3609f71854..0c4d3b6afbf8 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019, Google, Inc.
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index eaad5b20854c..bf1ebc29f22a 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Red Hat, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
index 92eae206baa6..309fe84b84ad 100644
--- a/tools/testing/selftests/kvm/guest_memfd_test.c
+++ b/tools/testing/selftests/kvm/guest_memfd_test.c
@@ -4,8 +4,6 @@
  *
  * Author: Chao Peng <chao.p.peng@linux.intel.com>
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
index decc521fc760..bce73bcb973c 100644
--- a/tools/testing/selftests/kvm/hardware_disable_test.c
+++ b/tools/testing/selftests/kvm/hardware_disable_test.c
@@ -4,9 +4,6 @@
  * kvm_arch_hardware_disable is called and it attempts to unregister the user
  * return notifiers.
  */
-
-#define _GNU_SOURCE
-
 #include <fcntl.h>
 #include <pthread.h>
 #include <semaphore.h>
diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
index 877449c34592..a9d97c213584 100644
--- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
+++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
@@ -5,9 +5,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019-2022 Google LLC
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <time.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
index 698c1cfa3111..f02355c3c4c2 100644
--- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
+++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
@@ -6,8 +6,6 @@
  *
  * Test the fd-based interface for KVM statistics.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
index b9e23265e4b3..c78f34699f73 100644
--- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
+++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
@@ -6,8 +6,6 @@
  *
  * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
index e0ba97ac1c56..7759c685086b 100644
--- a/tools/testing/selftests/kvm/kvm_page_table_test.c
+++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
@@ -8,9 +8,6 @@
  * page size have been pre-allocated on your system, if you are planning to
  * use hugepages to back the guest memory for testing.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
index 2bd25b191d15..b49690658c60 100644
--- a/tools/testing/selftests/kvm/lib/assert.c
+++ b/tools/testing/selftests/kvm/lib/assert.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Google LLC.
  */
-
-#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
-
 #include "test_util.h"
 
 #include <execinfo.h>
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index b2262b5fad9e..1eaf001d0ad4 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2018, Google LLC.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
 #include "test_util.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
index cf2c73971308..555e3932e529 100644
--- a/tools/testing/selftests/kvm/lib/memstress.c
+++ b/tools/testing/selftests/kvm/lib/memstress.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2020, Google LLC.
  */
-#define _GNU_SOURCE
-
 #include <inttypes.h>
 #include <linux/bitmap.h>
 
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index 5a8f8becb129..8ed0b74ae837 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2020, Google LLC.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdarg.h>
 #include <assert.h>
diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
index f4eef6eb2dc2..bd07568a5240 100644
--- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
+++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019-2022 Google LLC
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
index e248d3364b9c..e83809febae1 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <stdint.h>
 #include <stdbool.h>
 
diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
index 1a6da7389bf1..0b9678858b6d 100644
--- a/tools/testing/selftests/kvm/max_guest_memory_test.c
+++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
index 156361966612..05fcf902e067 100644
--- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
+++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2020, Google, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
index 0f9cabd99fd4..4b5004ef9c6b 100644
--- a/tools/testing/selftests/kvm/riscv/arch_timer.c
+++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
@@ -7,9 +7,6 @@
  *
  * Copyright (c) 2024, Intel Corporation.
  */
-
-#define _GNU_SOURCE
-
 #include "arch_timer.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
index 28f97fb52044..b3536400f9ac 100644
--- a/tools/testing/selftests/kvm/rseq_test.c
+++ b/tools/testing/selftests/kvm/rseq_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
index 626a2b8a2037..84ba79c42ab1 100644
--- a/tools/testing/selftests/kvm/s390x/cmma_test.c
+++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
@@ -7,8 +7,6 @@
  * Authors:
  *  Nico Boehr <nrb@linux.ibm.com>
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
index 43fb25ddc3ec..53def355ccba 100644
--- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
@@ -10,8 +10,6 @@
  *
  * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
index bd57d991e27d..214ff84f6fdb 100644
--- a/tools/testing/selftests/kvm/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/set_memory_region_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <pthread.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
index bae0c5026f82..e9231387c589 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <time.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index eae521f050e0..8e5713e36d4b 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -6,8 +6,6 @@
  *
  * Tests for amx #NM exception and save/restore.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
index 6c2e5e0ceb1f..9c21b6bccc38 100644
--- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
+++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
@@ -4,9 +4,6 @@
  *
  * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "flds_emulation.h"
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
index df351ae17029..10b1b0ba374e 100644
--- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2023, Google LLC.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
index 5c27efbf405e..4f5881d4ef66 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
@@ -7,8 +7,6 @@
  * This work is licensed under the terms of the GNU GPL, version 2.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
index 4c7257ecd2a6..4f3f3a9b038b 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
@@ -4,7 +4,6 @@
  *
  * Tests for Enlightened VMCS, including nested guest state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
index f1617762c22f..8206f5ef42dd 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2022, Red Hat, Inc.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <pthread.h>
 #include <inttypes.h>
 
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
index c9b18707edc0..b987a3d79715 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
@@ -4,7 +4,6 @@
  *
  * Tests for Hyper-V extensions to SVM.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
index 05b56095cf76..077cd0ec3040 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2022, Red Hat, Inc.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <asm/barrier.h>
 #include <pthread.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
index 3670331adf21..3eb0313ffa39 100644
--- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "test_util.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
index 17bbb96fc4df..e7efb2b35f8b 100644
--- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
@@ -5,9 +5,6 @@
  *
  * Copyright (C) 2022, Google LLC.
  */
-
-#define _GNU_SOURCE
-
 #include <fcntl.h>
 #include <stdint.h>
 #include <time.h>
diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
index 87011965dc41..2165b1ad8b38 100644
--- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
+++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
@@ -9,8 +9,6 @@
  * Verifies expected behavior of controlling guest access to
  * MSR_PLATFORM_INFO.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
index 26c85815f7e9..77f14138594e 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2023, Tencent, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <x86intrin.h>
 
 #include "pmu.h"
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
index 3c85d1ae9893..5ce53b8c46e0 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
@@ -9,9 +9,6 @@
  * Verifies the expected behavior of allow lists and deny lists for
  * virtual PMU events.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "kvm_util.h"
 #include "pmu.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
index e0f642d2a3c4..82a8d88b5338 100644
--- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
@@ -2,7 +2,6 @@
 /*
  * Copyright (C) 2022, Google LLC.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <limits.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
index 366cf18600bc..d691d86e5bc3 100644
--- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
+++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE /* for program_invocation_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
index 3610981d9162..c021c0795a96 100644
--- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
@@ -10,7 +10,6 @@
  * That bug allowed a user-mode program that called the KVM_SET_SREGS
  * ioctl to put a VCPU's local APIC into an invalid state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
index 416207c38a17..362be40fc00d 100644
--- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
@@ -5,9 +5,6 @@
  * Test that KVM emulates instructions in response to EPT violations when
  * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "flds_emulation.h"
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
index e18b86666e1f..55c88d664a94 100644
--- a/tools/testing/selftests/kvm/x86_64/smm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
@@ -4,7 +4,6 @@
  *
  * Tests for SMM.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
index 88b58aab7207..1c756db329e5 100644
--- a/tools/testing/selftests/kvm/x86_64/state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/state_test.c
@@ -6,7 +6,6 @@
  *
  * Tests for vCPU state save/restore, including nested guest state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
index adb5593daf48..8fa3948b0170 100644
--- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
@@ -8,8 +8,6 @@
  * including requesting an invalid register set, updates to/from values
  * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
index dcbb3c29fb8e..abe71946941f 100644
--- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
+++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
@@ -17,8 +17,6 @@
  * delivered into the guest or not.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <pthread.h>
 #include <inttypes.h>
 #include <string.h>
diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
index f4f61a2d2464..53afbea4df88 100644
--- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
+++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
@@ -4,8 +4,6 @@
  *
  * Tests for exiting into userspace on registered MSRs
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "kvm_test_harness.h"
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
index 977948fd52e6..fa512d033205 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Red Hat, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <linux/bitmap.h>
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
index ea0cb3cae0f7..3b93f262b797 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
@@ -10,7 +10,6 @@
  * and check it can be retrieved with KVM_GET_MSR, also test
  * the invalid LBR formats are rejected.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include <linux/bitmap.h>
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
index affc32800158..00dd2ac07a61 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
@@ -9,7 +9,6 @@
  * value instead of partially decayed timer value
  *
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
index 725c206ba0b9..c78e5f755116 100644
--- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
@@ -19,8 +19,6 @@
  * Migration is a command line option. When used on non-numa machines will 
  * exit with error. Test is still usefull on non-numa for testing IPIs.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <getopt.h>
 #include <pthread.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
index ab75b873a4ad..69849acd95b0 100644
--- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
index 167c97abff1b..f331a4e9bae3 100644
--- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
@@ -4,8 +4,6 @@
  *
  * Tests for the IA32_XSS MSR.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
index a6f89aaea77d..bdb3955a9452 100644
--- a/tools/testing/selftests/landlock/base_test.c
+++ b/tools/testing/selftests/landlock/base_test.c
@@ -5,8 +5,6 @@
  * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
  * Copyright © 2019-2020 ANSSI
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/landlock.h>
diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 9a6036fbf289..acec1c82c8b4 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -6,8 +6,6 @@
  * Copyright © 2020 ANSSI
  * Copyright © 2020-2022 Microsoft Corporation
  */
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <linux/landlock.h>
 #include <linux/magic.h>
diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
index f21cfbbc3638..eed040adcbac 100644
--- a/tools/testing/selftests/landlock/net_test.c
+++ b/tools/testing/selftests/landlock/net_test.c
@@ -5,8 +5,6 @@
  * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
  * Copyright © 2023 Microsoft Corporation
  */
-
-#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
index a19db4d0b3bd..c831e6d03b02 100644
--- a/tools/testing/selftests/landlock/ptrace_test.c
+++ b/tools/testing/selftests/landlock/ptrace_test.c
@@ -5,8 +5,6 @@
  * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
  * Copyright © 2019-2020 ANSSI
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/landlock.h>
diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
index 9ad258912646..1b18aac570f1 100644
--- a/tools/testing/selftests/lsm/common.c
+++ b/tools/testing/selftests/lsm/common.c
@@ -4,8 +4,6 @@
  *
  * Copyright © 2023 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
index df215e4aa63f..7465bde3f922 100644
--- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
index 06d24d4679a6..a6b44e25c21f 100644
--- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
+++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
index 66dec47e3ca3..110c6a07e74c 100644
--- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
index af89855adb7b..a8a60b6271a5 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
+++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
@@ -1,5 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
index a9cc17facfb3..b4651e2ade00 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
index 4cdc8b1d124c..17ae5199b916 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
index 8eb3d75f6e60..879d4f4c66fa 100644
--- a/tools/testing/selftests/memfd/common.c
+++ b/tools/testing/selftests/memfd/common.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <stdio.h>
diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
index 93798c8c5d54..15bc189bf831 100644
--- a/tools/testing/selftests/memfd/fuse_test.c
+++ b/tools/testing/selftests/memfd/fuse_test.c
@@ -12,8 +12,6 @@
  * the read() syscall with our memory-mapped memfd object as receive buffer to
  * force the kernel to write into our memfd object.
  */
-
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <errno.h>
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index 18f585684e20..5172c27a8748 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <errno.h>
diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
index 363bf5f801be..6f1a36d51f19 100644
--- a/tools/testing/selftests/mm/cow.c
+++ b/tools/testing/selftests/mm/cow.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
index ad168d35b23b..3bfd5a630081 100644
--- a/tools/testing/selftests/mm/gup_longterm.c
+++ b/tools/testing/selftests/mm/gup_longterm.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
index 267eea2e0e0b..edb46888222f 100644
--- a/tools/testing/selftests/mm/hugepage-mmap.c
+++ b/tools/testing/selftests/mm/hugepage-mmap.c
@@ -16,7 +16,6 @@
  * range.
  * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
index c463d1c09c9b..8e22822bb754 100644
--- a/tools/testing/selftests/mm/hugepage-mremap.c
+++ b/tools/testing/selftests/mm/hugepage-mremap.c
@@ -11,8 +11,6 @@
  * To make sure the test triggers pmd sharing and goes through the 'unshare'
  * path in the mremap code use 1GB (1024) or more.
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
index e74107185324..70c40c67bc5d 100644
--- a/tools/testing/selftests/mm/hugetlb-madvise.c
+++ b/tools/testing/selftests/mm/hugetlb-madvise.c
@@ -11,8 +11,6 @@
  * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
  * directory.
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
index ba6cc6f9cabc..6b8b41b4f754 100644
--- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
+++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
index 829320a519e7..d18bf400dae6 100644
--- a/tools/testing/selftests/mm/khugepaged.c
+++ b/tools/testing/selftests/mm/khugepaged.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
index d615767e396b..1deae905c42e 100644
--- a/tools/testing/selftests/mm/ksm_functional_tests.c
+++ b/tools/testing/selftests/mm/ksm_functional_tests.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
index 17bcb07f19f3..d19ad13ffd7e 100644
--- a/tools/testing/selftests/mm/madv_populate.c
+++ b/tools/testing/selftests/mm/madv_populate.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
index 5c8a53869b1b..ff4d4079bd0e 100644
--- a/tools/testing/selftests/mm/map_populate.c
+++ b/tools/testing/selftests/mm/map_populate.c
@@ -4,8 +4,6 @@
  *
  * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/mman.h>
diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
index 1e01d3ddc11c..200bedcdc32e 100644
--- a/tools/testing/selftests/mm/mdwe_test.c
+++ b/tools/testing/selftests/mm/mdwe_test.c
@@ -7,7 +7,6 @@
 #include <linux/mman.h>
 #include <linux/prctl.h>
 
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/auxv.h>
diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
index 9b298f6a04b3..750adede2816 100644
--- a/tools/testing/selftests/mm/memfd_secret.c
+++ b/tools/testing/selftests/mm/memfd_secret.c
@@ -4,8 +4,6 @@
  *
  * Author: Mike Rapoport <rppt@linux.ibm.com>
  */
-
-#define _GNU_SOURCE
 #include <sys/uio.h>
 #include <sys/mman.h>
 #include <sys/wait.h>
diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
index 26f744188ad0..42574290d728 100644
--- a/tools/testing/selftests/mm/mlock2-tests.c
+++ b/tools/testing/selftests/mm/mlock2-tests.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sys/mman.h>
 #include <stdint.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
index 100370a7111d..d78bf686e99f 100644
--- a/tools/testing/selftests/mm/mrelease_test.c
+++ b/tools/testing/selftests/mm/mrelease_test.c
@@ -2,7 +2,6 @@
 /*
  * Copyright 2022 Google LLC
  */
-#define _GNU_SOURCE
 #include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
index 1d75084b9ca5..934fa6b441b2 100644
--- a/tools/testing/selftests/mm/mremap_dontunmap.c
+++ b/tools/testing/selftests/mm/mremap_dontunmap.c
@@ -5,7 +5,6 @@
  *
  * Copyright 2020, Brian Geffon <bgeffon@google.com>
  */
-#define _GNU_SOURCE
 #include <sys/mman.h>
 #include <linux/mman.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
index 2f8b991f78cb..e057154630e0 100644
--- a/tools/testing/selftests/mm/mremap_test.c
+++ b/tools/testing/selftests/mm/mremap_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright 2020 Google LLC
  */
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index d59517ed3d48..2a18b5d276f0 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
index 1af3156a9db8..37d6b01ce90a 100644
--- a/tools/testing/selftests/mm/pkey-helpers.h
+++ b/tools/testing/selftests/mm/pkey-helpers.h
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PKEYS_HELPER_H
 #define _PKEYS_HELPER_H
-#define _GNU_SOURCE
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
index 48dc151f8fca..9f7de92caeda 100644
--- a/tools/testing/selftests/mm/protection_keys.c
+++ b/tools/testing/selftests/mm/protection_keys.c
@@ -21,7 +21,6 @@
  *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
  *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
  */
-#define _GNU_SOURCE
 #define __SANE_USERSPACE_TYPES__
 #include <errno.h>
 #include <linux/elf.h>
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index d3c7f5fb3e7b..ae6ac950d7a1 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -3,8 +3,6 @@
  * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
  * address range in a process via <debugfs>/split_huge_pages interface.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
index ea7fd8fe2876..28a5c31bd791 100644
--- a/tools/testing/selftests/mm/thuge-gen.c
+++ b/tools/testing/selftests/mm/thuge-gen.c
@@ -12,8 +12,6 @@
    ipcrm -m by hand, like this
    sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
    (warning this will remove all if someone else uses them) */
-
-#define _GNU_SOURCE 1
 #include <sys/mman.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
index cc5629c3d2aa..abb44319264a 100644
--- a/tools/testing/selftests/mm/uffd-common.h
+++ b/tools/testing/selftests/mm/uffd-common.h
@@ -7,7 +7,6 @@
 #ifndef __UFFD_COMMON_H__
 #define __UFFD_COMMON_H__
 
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
index c6a8c732b802..d894417134b6 100644
--- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
+++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
index bcf51d785a37..bd975670f61d 100644
--- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
+++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
index 79a3dd75590e..279d0c5f70d3 100644
--- a/tools/testing/selftests/net/af_unix/diag_uid.c
+++ b/tools/testing/selftests/net/af_unix/diag_uid.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright Amazon.com Inc. or its affiliates. */
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <unistd.h>
diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
index 7e534594167e..2986b8cd0418 100644
--- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
+++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0 OR MIT
-#define _GNU_SOURCE
 #include <error.h>
 #include <limits.h>
 #include <stddef.h>
diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
index d799fd8f5c7c..34e816862cc7 100644
--- a/tools/testing/selftests/net/af_unix/unix_connect.c
+++ b/tools/testing/selftests/net/af_unix/unix_connect.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <stddef.h>
diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
index 90eb06fefa59..8262aa862331 100644
--- a/tools/testing/selftests/net/csum.c
+++ b/tools/testing/selftests/net/csum.c
@@ -58,9 +58,6 @@
  * different seed for each run (and logs this for reproducibility). It
  * is advised to enable this for extra coverage in continuous testing.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/byteorder.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
index 353e1e867fbb..f5d7032e6466 100644
--- a/tools/testing/selftests/net/gro.c
+++ b/tools/testing/selftests/net/gro.c
@@ -34,9 +34,6 @@
  * flakiness is to be expected.
  *
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
index f9ed749fd8c7..80c9e567a3d8 100644
--- a/tools/testing/selftests/net/ip_defrag.c
+++ b/tools/testing/selftests/net/ip_defrag.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
index be4a30a0d02a..04aa06d26b09 100644
--- a/tools/testing/selftests/net/ipsec.c
+++ b/tools/testing/selftests/net/ipsec.c
@@ -3,9 +3,6 @@
  * ipsec.c - Check xfrm on veth inside a net-ns.
  * Copyright (c) 2018 Dmitry Safonov
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/types.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
index 708a9822259d..b7e0c3c02e20 100644
--- a/tools/testing/selftests/net/ipv6_flowlabel.c
+++ b/tools/testing/selftests/net/ipv6_flowlabel.c
@@ -1,8 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Test IPV6_FLOWINFO cmsg on send and recv */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/byteorder.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
index af95b48acea9..ebd219ba386e 100644
--- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
+++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
@@ -1,8 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Test IPV6_FLOWINFO_MGR */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
index d2043ec3bf6d..ea93030ed3ec 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <limits.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
index 218aac467321..c5bf873d76c2 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
index 926b0be87c99..7203ca9900e9 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
index bdc03a2097e8..9278bf585c80 100644
--- a/tools/testing/selftests/net/msg_zerocopy.c
+++ b/tools/testing/selftests/net/msg_zerocopy.c
@@ -24,9 +24,6 @@
  * the kernel queues completions on the error queue for all zerocopy
  * transfers.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
index cd8a58097448..88e1d3b2ddf1 100644
--- a/tools/testing/selftests/net/nettest.c
+++ b/tools/testing/selftests/net/nettest.c
@@ -3,8 +3,6 @@
  *
  * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
  */
-
-#define _GNU_SOURCE
 #include <features.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
index 1a736f700be4..5b2d34440ae9 100644
--- a/tools/testing/selftests/net/psock_fanout.c
+++ b/tools/testing/selftests/net/psock_fanout.c
@@ -26,9 +26,6 @@
  * Todo:
  * - functionality: PACKET_FANOUT_FLAG_DEFRAG
  */
-
-#define _GNU_SOURCE		/* for sched_setaffinity */
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
index edf1e6f80d41..2f29b513e18f 100644
--- a/tools/testing/selftests/net/psock_snd.c
+++ b/tools/testing/selftests/net/psock_snd.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
index b8475cb29be7..9ee6ece52865 100644
--- a/tools/testing/selftests/net/reuseport_addr_any.c
+++ b/tools/testing/selftests/net/reuseport_addr_any.c
@@ -3,9 +3,6 @@
 /* Test that sockets listening on a specific address are preferred
  * over sockets listening on addr_any.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
index 2d646174729f..e93e38cfb2a8 100644
--- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
+++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
@@ -11,9 +11,6 @@
  * This entire process is done for several different core id permutations
  * and for each IPv4/IPv6 and TCP/UDP combination.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
index c9ba36aa688e..502fdb9ce770 100644
--- a/tools/testing/selftests/net/reuseport_bpf_numa.c
+++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
@@ -3,9 +3,6 @@
  * Test functionality of BPF filters with SO_REUSEPORT. Same test as
  * in reuseport_bpf_cpu, only as one socket per NUMA node.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
index fb7a59ed759e..d3c3d3f39f8f 100644
--- a/tools/testing/selftests/net/reuseport_dualstack.c
+++ b/tools/testing/selftests/net/reuseport_dualstack.c
@@ -10,9 +10,6 @@
  * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
  * AF_INET preference for v4 packets.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
index e9fa14e10732..95bd0cdc3253 100644
--- a/tools/testing/selftests/net/so_incoming_cpu.c
+++ b/tools/testing/selftests/net/so_incoming_cpu.c
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright Amazon.com Inc. or its affiliates. */
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
index b39e87e967cd..18532d564f79 100644
--- a/tools/testing/selftests/net/so_netns_cookie.c
+++ b/tools/testing/selftests/net/so_netns_cookie.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
index 8457b7ccbc09..011a24af9786 100644
--- a/tools/testing/selftests/net/so_txtime.c
+++ b/tools/testing/selftests/net/so_txtime.c
@@ -9,9 +9,6 @@
  * the expected stream. Sender will read transmit timestamps from the error
  * queue. The streams can differ due to out-of-order delivery and drops.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
index 247c3b3ac1c9..fa78b92d9740 100644
--- a/tools/testing/selftests/net/tap.c
+++ b/tools/testing/selftests/net/tap.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
index c1cb0c75156a..d30f89bb944c 100644
--- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
+++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
@@ -12,7 +12,6 @@
  * there are no cases in which a cookie is not accepted by verifying
  * that TcpExtTCPFastOpenPassiveFail remains 0.
  */
-#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
index bd6a9c7a3e8a..71ee145f151e 100644
--- a/tools/testing/selftests/net/tcp_inq.c
+++ b/tools/testing/selftests/net/tcp_inq.c
@@ -5,8 +5,6 @@
  *
  * Simple example on how to use TCP_INQ and TCP_CM_INQ.
  */
-#define _GNU_SOURCE
-
 #include <error.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
index 4fcce5150850..72d5f1207ee0 100644
--- a/tools/testing/selftests/net/tcp_mmap.c
+++ b/tools/testing/selftests/net/tcp_mmap.c
@@ -46,7 +46,6 @@
  * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
  *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
  */
-#define _GNU_SOURCE
 #include <pthread.h>
 #include <sys/types.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index f27a12d2a2c9..6dbad97d1d0a 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
index 9ba03164d73a..e2d739892ce4 100644
--- a/tools/testing/selftests/net/toeplitz.c
+++ b/tools/testing/selftests/net/toeplitz.c
@@ -20,9 +20,6 @@
  * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
  * 6. Compare the cpus from 4 and 5
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
index fa83918b62d1..a64dcfb242c1 100644
--- a/tools/testing/selftests/net/tun.c
+++ b/tools/testing/selftests/net/tun.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
index 7d9ea039450a..96972e0110a0 100644
--- a/tools/testing/selftests/net/txring_overwrite.c
+++ b/tools/testing/selftests/net/txring_overwrite.c
@@ -4,9 +4,6 @@
  * Verify that consecutive sends over packet tx_ring are mirrored
  * with their original content intact.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <assert.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
index ec60a16c9307..33dba9e90dea 100644
--- a/tools/testing/selftests/net/txtimestamp.c
+++ b/tools/testing/selftests/net/txtimestamp.c
@@ -16,9 +16,6 @@
  * This test requires a dummy TCP server.
  * A simple `nc6 [-u] -l -p $DESTPORT` will do
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/types.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
index 85b3baa3f7f3..9dc1026a033a 100644
--- a/tools/testing/selftests/net/udpgso.c
+++ b/tools/testing/selftests/net/udpgso.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <stddef.h>
 #include <arpa/inet.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
index 1cbadd267c96..999df1236320 100644
--- a/tools/testing/selftests/net/udpgso_bench_rx.c
+++ b/tools/testing/selftests/net/udpgso_bench_rx.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
index 477392715a9a..d7632993b354 100644
--- a/tools/testing/selftests/net/udpgso_bench_tx.c
+++ b/tools/testing/selftests/net/udpgso_bench_tx.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
index 5814611a1dc7..ef4d923f4759 100644
--- a/tools/testing/selftests/perf_events/remove_on_exec.c
+++ b/tools/testing/selftests/perf_events/remove_on_exec.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2021, Google LLC.
  */
 
-#define _GNU_SOURCE
-
 /* We need the latest siginfo from the kernel repo. */
 #include <sys/types.h>
 #include <asm/siginfo.h>
diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
index d1d8483ac628..14d1a3c8cb5c 100644
--- a/tools/testing/selftests/perf_events/sigtrap_threads.c
+++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2021, Google LLC.
  */
 
-#define _GNU_SOURCE
-
 /* We need the latest siginfo from the kernel repo. */
 #include <sys/types.h>
 #include <asm/siginfo.h>
diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
index 7d84097ad45c..54dc8f16d92a 100644
--- a/tools/testing/selftests/pid_namespace/regression_enomem.c
+++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
index 88d6830ee004..e33177b1aa41 100644
--- a/tools/testing/selftests/pidfd/pidfd.h
+++ b/tools/testing/selftests/pidfd/pidfd.h
@@ -3,7 +3,6 @@
 #ifndef __PIDFD_H
 #define __PIDFD_H
 
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
index 01cc37bf611c..67c9dc436c71 100644
--- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
index cd51d547b751..b6a0e9b3d2f5 100644
--- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
index 8a59438ccc78..781a3931fb5a 100644
--- a/tools/testing/selftests/pidfd/pidfd_open_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
index 610811275357..a40fb27a78bb 100644
--- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <poll.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
index 6e2f2cd400ca..49d7a78cc4fe 100644
--- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
index c081ae91313a..c3d52406b8fd 100644
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
index 0dcb8365ddc3..54beba0983f1 100644
--- a/tools/testing/selftests/pidfd/pidfd_wait.c
+++ b/tools/testing/selftests/pidfd/pidfd_wait.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
index 5297b10d25c3..054a78ebe8b5 100644
--- a/tools/testing/selftests/ptrace/get_set_sud.c
+++ b/tools/testing/selftests/ptrace/get_set_sud.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include "../kselftest_harness.h"
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
index a6884f66dc01..1b7b77190f72 100644
--- a/tools/testing/selftests/ptrace/peeksiginfo.c
+++ b/tools/testing/selftests/ptrace/peeksiginfo.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <signal.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
index 2348d2c20d0a..5961c24ee1ae 100644
--- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
+++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: LGPL-2.1
-#define _GNU_SOURCE
 #include <assert.h>
 #include <pthread.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
index 295eea16466f..1fed749b4bd7 100644
--- a/tools/testing/selftests/rseq/basic_test.c
+++ b/tools/testing/selftests/rseq/basic_test.c
@@ -2,8 +2,6 @@
 /*
  * Basic test coverage for critical regions and rseq_current_cpu().
  */
-
-#define _GNU_SOURCE
 #include <assert.h>
 #include <sched.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
index 2f37961240ca..48a55d94eb72 100644
--- a/tools/testing/selftests/rseq/param_test.c
+++ b/tools/testing/selftests/rseq/param_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: LGPL-2.1
-#define _GNU_SOURCE
 #include <assert.h>
 #include <linux/membarrier.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
index 96e812bdf8a4..88602889414c 100644
--- a/tools/testing/selftests/rseq/rseq.c
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -14,8 +14,6 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <sched.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
index b83099160fbc..3632a4890da9 100644
--- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
+++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
@@ -2,7 +2,6 @@
  * Strictly speaking, this is not a test. But it can report during test
  * runs so relative performace can be measured.
  */
-#define _GNU_SOURCE
 #include <assert.h>
 #include <err.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index 783ebce8c4de..972ccc12553e 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -4,8 +4,6 @@
  *
  * Test code for seccomp bpf.
  */
-
-#define _GNU_SOURCE
 #include <sys/types.h>
 
 /*
diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
index 7288a05136ba..a1f156dbbd56 100644
--- a/tools/testing/selftests/user_events/abi_test.c
+++ b/tools/testing/selftests/user_events/abi_test.c
@@ -4,8 +4,6 @@
  *
  * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
  */
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <errno.h>
diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
index d884fd69dd51..9441635fc452 100644
--- a/tools/testing/selftests/x86/amx.c
+++ b/tools/testing/selftests/x86/amx.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <errno.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
index 3bc95f3ed585..0129cdae8abe 100644
--- a/tools/testing/selftests/x86/check_initial_reg_state.c
+++ b/tools/testing/selftests/x86/check_initial_reg_state.c
@@ -3,9 +3,6 @@
  * check_initial_reg_state.c - check that execve sets the correct state
  * Copyright (c) 2014-2016 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdio.h>
 
 unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
index cf9ce8fbb656..d2c746149678 100644
--- a/tools/testing/selftests/x86/corrupt_xstate_header.c
+++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
@@ -4,9 +4,6 @@
  *
  * Based on analysis and a test case from Thomas Gleixner.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
index d1e919b0c1dc..9fa9d4a847ac 100644
--- a/tools/testing/selftests/x86/entry_from_vm86.c
+++ b/tools/testing/selftests/x86/entry_from_vm86.c
@@ -5,9 +5,6 @@
  *
  * This exercises a few paths that need to special-case vm86 mode.
  */
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
index 8c780cce941d..348134d2cefc 100644
--- a/tools/testing/selftests/x86/fsgsbase.c
+++ b/tools/testing/selftests/x86/fsgsbase.c
@@ -3,8 +3,6 @@
  * fsgsbase.c, an fsgsbase test
  * Copyright (c) 2014-2016 Andy Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
index 6fffadc51579..88dce47ab8e6 100644
--- a/tools/testing/selftests/x86/fsgsbase_restore.c
+++ b/tools/testing/selftests/x86/fsgsbase_restore.c
@@ -12,8 +12,6 @@
  *
  * This is not part of fsgsbase.c, because that test is 64-bit only.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
index 57ec5e99edb9..07b7c10f8d39 100644
--- a/tools/testing/selftests/x86/ioperm.c
+++ b/tools/testing/selftests/x86/ioperm.c
@@ -3,8 +3,6 @@
  * ioperm.c - Test case for ioperm(2)
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
index 7e3e09c1abac..baa691154905 100644
--- a/tools/testing/selftests/x86/iopl.c
+++ b/tools/testing/selftests/x86/iopl.c
@@ -3,8 +3,6 @@
  * iopl.c - Test case for a Linux on Xen 64-bit bug
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
index 215b8150b7cc..39edfd7f6037 100644
--- a/tools/testing/selftests/x86/lam.c
+++ b/tools/testing/selftests/x86/lam.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
index 3a29346e1452..3b4237a85a12 100644
--- a/tools/testing/selftests/x86/ldt_gdt.c
+++ b/tools/testing/selftests/x86/ldt_gdt.c
@@ -3,8 +3,6 @@
  * ldt_gdt.c - Test cases for LDT and GDT access
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
index cc3de6ff9fba..47ecc63220b7 100644
--- a/tools/testing/selftests/x86/mov_ss_trap.c
+++ b/tools/testing/selftests/x86/mov_ss_trap.c
@@ -19,8 +19,6 @@
  *
  * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
  */
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <sys/ptrace.h>
 #include <sys/types.h>
diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
index ea4a4e246879..97c5b34096cc 100644
--- a/tools/testing/selftests/x86/nx_stack.c
+++ b/tools/testing/selftests/x86/nx_stack.c
@@ -23,8 +23,6 @@
  * Regular stack is completely overwritten before testing.
  * Test doesn't exit SIGSEGV handler after first fault at INT3.
  */
-#undef _GNU_SOURCE
-#define _GNU_SOURCE
 #undef NDEBUG
 #include <assert.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
index 12aaa063196e..bdc81c8bd1a7 100644
--- a/tools/testing/selftests/x86/ptrace_syscall.c
+++ b/tools/testing/selftests/x86/ptrace_syscall.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <sys/ptrace.h>
 #include <sys/types.h>
 #include <sys/wait.h>
diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
index f689af75e979..7f41c3a4268b 100644
--- a/tools/testing/selftests/x86/sigaltstack.c
+++ b/tools/testing/selftests/x86/sigaltstack.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-
-#define _GNU_SOURCE
 #include <signal.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
index 5d7961a5f7f6..2054f729b2c2 100644
--- a/tools/testing/selftests/x86/sigreturn.c
+++ b/tools/testing/selftests/x86/sigreturn.c
@@ -24,9 +24,6 @@
  *
  * Do not run on outdated, unpatched kernels at risk of nasty crashes.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/time.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
index 9a30f443e928..375f3b50a0b5 100644
--- a/tools/testing/selftests/x86/single_step_syscall.c
+++ b/tools/testing/selftests/x86/single_step_syscall.c
@@ -9,9 +9,6 @@
  * immediately issues #DB from CPL 0.  This requires special handling in
  * the kernel.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/time.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
index 461fa41a4d02..10eee1bcd015 100644
--- a/tools/testing/selftests/x86/syscall_arg_fault.c
+++ b/tools/testing/selftests/x86/syscall_arg_fault.c
@@ -3,9 +3,6 @@
  * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
index 991591718bb0..c72fc8aaa4d3 100644
--- a/tools/testing/selftests/x86/syscall_numbering.c
+++ b/tools/testing/selftests/x86/syscall_numbering.c
@@ -5,9 +5,6 @@
  *
  * Copyright (c) 2018 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
index 84d74be1d902..24bc219358a5 100644
--- a/tools/testing/selftests/x86/sysret_rip.c
+++ b/tools/testing/selftests/x86/sysret_rip.c
@@ -3,9 +3,6 @@
  * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
  * Copyright (c) 2014-2016 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
index 5f3d4fca440f..f8b9e0b2a0c5 100644
--- a/tools/testing/selftests/x86/sysret_ss_attrs.c
+++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
@@ -7,9 +7,6 @@
  * the hidden attributes set to an unusable state.  Make sure the kernel
  * doesn't let this happen.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
index 6b5036fbb735..0c9431ba7d31 100644
--- a/tools/testing/selftests/x86/test_FCMOV.c
+++ b/tools/testing/selftests/x86/test_FCMOV.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
index aec6692c6dcf..ba186665918d 100644
--- a/tools/testing/selftests/x86/test_FCOMI.c
+++ b/tools/testing/selftests/x86/test_FCOMI.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
index 09789c0ce3e9..95580cdaaa32 100644
--- a/tools/testing/selftests/x86/test_FISTTP.c
+++ b/tools/testing/selftests/x86/test_FISTTP.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
index f0d876d48277..a8bdba356682 100644
--- a/tools/testing/selftests/x86/test_mremap_vdso.c
+++ b/tools/testing/selftests/x86/test_mremap_vdso.c
@@ -9,7 +9,6 @@
  * Can be built statically:
  * gcc -Os -Wall -static -m32 test_mremap_vdso.c
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
index 757e6527f67e..0ceca9064cec 100644
--- a/tools/testing/selftests/x86/test_shadow_stack.c
+++ b/tools/testing/selftests/x86/test_shadow_stack.c
@@ -7,9 +7,6 @@
  * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
  * stick to the basics and hope the compiler doesn't do anything strange.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/syscall.h>
 #include <asm/mman.h>
 #include <sys/mman.h>
diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
index 8965c311bd65..5cd13279bba5 100644
--- a/tools/testing/selftests/x86/test_syscall_vdso.c
+++ b/tools/testing/selftests/x86/test_syscall_vdso.c
@@ -8,10 +8,6 @@
  * Can be built statically:
  * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
  */
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index 47cab972807c..cbf4e5012005 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -1,7 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <sys/time.h>
 #include <time.h>
diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
index 4c311e1af4c7..754f5d4d425a 100644
--- a/tools/testing/selftests/x86/unwind_vdso.c
+++ b/tools/testing/selftests/x86/unwind_vdso.c
@@ -5,9 +5,6 @@
  *
  * This tests __kernel_vsyscall's unwind info.
  */
-
-#define _GNU_SOURCE
-
 #include <features.h>
 #include <stdio.h>
 
diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
index fe99f2434155..8193de22a390 100644
--- a/tools/testing/selftests/x86/vdso_restorer.c
+++ b/tools/testing/selftests/x86/vdso_restorer.c
@@ -10,9 +10,6 @@
  * 64-bit userspace has never supported sa_restorer == NULL, so this is
  * 32-bit only.
  */
-
-#define _GNU_SOURCE
-
 #include <err.h>
 #include <stdio.h>
 #include <dlfcn.h>
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog


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[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Edward Liaw]

_GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
prevent _GNU_SOURCE redefined warnings.

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
 tools/testing/selftests/capabilities/test_execve.c            | 2 --
 tools/testing/selftests/clone3/clone3.c                       | 2 --
 .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
 tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
 tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
 tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
 tools/testing/selftests/core/close_range_test.c               | 2 --
 tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
 tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
 tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
 tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
 tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
 tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
 tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
 tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
 tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
 .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
 tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
 tools/testing/selftests/ipc/msgque.c                          | 1 -
 tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
 tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
 tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
 tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
 tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
 tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
 tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
 tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
 tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
 tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
 tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
 tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
 tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
 tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
 tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
 tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
 tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
 tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
 tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
 .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
 tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
 tools/testing/selftests/kvm/rseq_test.c                       | 1 -
 tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
 tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
 tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
 tools/testing/selftests/kvm/steal_time.c                      | 1 -
 tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
 tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
 tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
 tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
 .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
 tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
 .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
 tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
 tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
 tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
 tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
 tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
 tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
 .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
 tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
 tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
 tools/testing/selftests/landlock/base_test.c                  | 2 --
 tools/testing/selftests/landlock/fs_test.c                    | 2 --
 tools/testing/selftests/landlock/net_test.c                   | 2 --
 tools/testing/selftests/landlock/ptrace_test.c                | 2 --
 tools/testing/selftests/lsm/common.c                          | 2 --
 tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
 tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
 tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
 tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
 .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
 .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
 tools/testing/selftests/memfd/common.c                        | 1 -
 tools/testing/selftests/memfd/fuse_test.c                     | 2 --
 tools/testing/selftests/memfd/memfd_test.c                    | 1 -
 tools/testing/selftests/mm/cow.c                              | 1 -
 tools/testing/selftests/mm/gup_longterm.c                     | 1 -
 tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
 tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
 tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
 tools/testing/selftests/mm/khugepaged.c                       | 1 -
 tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
 tools/testing/selftests/mm/madv_populate.c                    | 1 -
 tools/testing/selftests/mm/map_populate.c                     | 2 --
 tools/testing/selftests/mm/mdwe_test.c                        | 1 -
 tools/testing/selftests/mm/memfd_secret.c                     | 2 --
 tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
 tools/testing/selftests/mm/mrelease_test.c                    | 1 -
 tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
 tools/testing/selftests/mm/mremap_test.c                      | 2 --
 tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
 tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
 tools/testing/selftests/mm/protection_keys.c                  | 1 -
 tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
 tools/testing/selftests/mm/thuge-gen.c                        | 2 --
 tools/testing/selftests/mm/uffd-common.h                      | 1 -
 tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
 .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
 tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
 tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
 tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
 tools/testing/selftests/net/csum.c                            | 3 ---
 tools/testing/selftests/net/gro.c                             | 3 ---
 tools/testing/selftests/net/ip_defrag.c                       | 3 ---
 tools/testing/selftests/net/ipsec.c                           | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
 tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
 tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
 tools/testing/selftests/net/nettest.c                         | 2 --
 tools/testing/selftests/net/psock_fanout.c                    | 3 ---
 tools/testing/selftests/net/psock_snd.c                       | 3 ---
 tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
 tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
 tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
 tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
 tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
 tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
 tools/testing/selftests/net/so_txtime.c                       | 3 ---
 tools/testing/selftests/net/tap.c                             | 3 ---
 tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
 tools/testing/selftests/net/tcp_inq.c                         | 2 --
 tools/testing/selftests/net/tcp_mmap.c                        | 1 -
 tools/testing/selftests/net/tls.c                             | 3 ---
 tools/testing/selftests/net/toeplitz.c                        | 3 ---
 tools/testing/selftests/net/tun.c                             | 3 ---
 tools/testing/selftests/net/txring_overwrite.c                | 3 ---
 tools/testing/selftests/net/txtimestamp.c                     | 3 ---
 tools/testing/selftests/net/udpgso.c                          | 3 ---
 tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
 tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
 tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
 tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
 tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
 tools/testing/selftests/pidfd/pidfd.h                         | 1 -
 tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
 tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
 tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
 tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
 tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
 tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
 tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
 tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
 tools/testing/selftests/rseq/basic_test.c                     | 2 --
 tools/testing/selftests/rseq/param_test.c                     | 1 -
 tools/testing/selftests/rseq/rseq.c                           | 2 --
 tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
 tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
 tools/testing/selftests/user_events/abi_test.c                | 2 --
 tools/testing/selftests/x86/amx.c                             | 2 --
 tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
 tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
 tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
 tools/testing/selftests/x86/fsgsbase.c                        | 2 --
 tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
 tools/testing/selftests/x86/ioperm.c                          | 2 --
 tools/testing/selftests/x86/iopl.c                            | 2 --
 tools/testing/selftests/x86/lam.c                             | 1 -
 tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
 tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
 tools/testing/selftests/x86/nx_stack.c                        | 2 --
 tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
 tools/testing/selftests/x86/sigaltstack.c                     | 2 --
 tools/testing/selftests/x86/sigreturn.c                       | 3 ---
 tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
 tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
 tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
 tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
 tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
 tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
 tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
 tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
 tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
 tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
 tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
 tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
 tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
 tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
 198 files changed, 405 deletions(-)

diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
index b171fd53b004..c1a6ce7b0912 100644
--- a/tools/testing/selftests/cachestat/test_cachestat.c
+++ b/tools/testing/selftests/cachestat/test_cachestat.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdbool.h>
 #include <linux/kernel.h>
diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
index 7cde07a5df78..e3954b88c3ee 100644
--- a/tools/testing/selftests/capabilities/test_execve.c
+++ b/tools/testing/selftests/capabilities/test_execve.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <cap-ng.h>
 #include <linux/capability.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 3c9bf0cd82a8..3c5e45dae617 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
 /* Based on Christian Brauner's clone3() example */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <inttypes.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
index 31b56d625655..bb99ea20f7d5 100644
--- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
+++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
@@ -7,8 +7,6 @@
  */
 
 /* capabilities related code based on selftests/bpf/test_verifier.c */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <linux/sched.h>
diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
index 54a8b2445be9..50336d56db6b 100644
--- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
+++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <sched.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
index 3d2663fe50ba..172e19d5515f 100644
--- a/tools/testing/selftests/clone3/clone3_selftests.h
+++ b/tools/testing/selftests/clone3/clone3_selftests.h
@@ -3,7 +3,6 @@
 #ifndef _CLONE3_SELFTESTS_H
 #define _CLONE3_SELFTESTS_H
 
-#define _GNU_SOURCE
 #include <sched.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
index ed785afb6077..8b5ed4484ee6 100644
--- a/tools/testing/selftests/clone3/clone3_set_tid.c
+++ b/tools/testing/selftests/clone3/clone3_set_tid.c
@@ -5,8 +5,6 @@
  * These tests are assuming to be running in the host's
  * PID namespace.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <linux/sched.h>
diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
index c59e4adb905d..1c2902bcc913 100644
--- a/tools/testing/selftests/core/close_range_test.c
+++ b/tools/testing/selftests/core/close_range_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/kernel.h>
diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
index c812080e304e..7c8dbab8ac44 100644
--- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
+++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <stdio.h>
diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
index e0319417124d..6b411859c2cd 100644
--- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
+++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
index 5f362c0fd890..fca693db1b09 100644
--- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
+++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
index b1fc9b916ace..73766447eeb0 100644
--- a/tools/testing/selftests/filesystems/devpts_pts.c
+++ b/tools/testing/selftests/filesystems/devpts_pts.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
index c0a9b2d3302d..05367a70b963 100644
--- a/tools/testing/selftests/filesystems/dnotify_test.c
+++ b/tools/testing/selftests/filesystems/dnotify_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE	/* needed to get the defines */
 #include <fcntl.h>	/* in glibc 2.2 this has the needed
 				   values defined */
 #include <signal.h>
diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
index 65ede506305c..9bc2ddad7e92 100644
--- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
+++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <asm/unistd.h>
 #include <linux/time_types.h>
 #include <poll.h>
diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
index f142a137526c..17935f42fbc9 100644
--- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
+++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <asm/unistd.h>
diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
index e488ad354fce..56cf3ad8640d 100644
--- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
+++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
@@ -6,8 +6,6 @@
  * Copyright 2022 Red Hat Inc.
  * Author: Javier Martinez Canillas <javierm@redhat.com>
  */
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
index 759f86e7d263..b58a80bde95a 100644
--- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
+++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <inttypes.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
index 3eafd7da58e2..d1cefd1b7d16 100644
--- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
+++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <stdint.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
index 7f3ca5c78df1..8e41f9fe784c 100644
--- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
+++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
@@ -16,9 +16,6 @@
  *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
  *
  *****************************************************************************/
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <limits.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
index 656c43c24044..291c81d59a9d 100644
--- a/tools/testing/selftests/ipc/msgque.c
+++ b/tools/testing/selftests/ipc/msgque.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
index 25110c7c0b3e..885c9e943cee 100644
--- a/tools/testing/selftests/kcmp/kcmp_test.c
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
index 4eaba83cdcf3..5369959e9fc2 100644
--- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
+++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
@@ -5,8 +5,6 @@
  *
  * Copyright (c) 2021, Google LLC.
  */
-#define _GNU_SOURCE
-
 #include "arch_timer.h"
 #include "delay.h"
 #include "gic.h"
diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
index 5972905275cf..79e99f47a9fe 100644
--- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
+++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
@@ -7,7 +7,6 @@
  * hugetlbfs with a hole). It checks that the expected handling method is
  * called (e.g., uffd faults with the right address and write/read flag).
  */
-#define _GNU_SOURCE
 #include <linux/bitmap.h>
 #include <fcntl.h>
 #include <test_util.h>
diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
index 9b004905d1d3..1c8c6f0c1ca3 100644
--- a/tools/testing/selftests/kvm/aarch64/psci_test.c
+++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
@@ -10,9 +10,6 @@
  *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
  *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
  */
-
-#define _GNU_SOURCE
-
 #include <linux/psci.h>
 
 #include "kvm_util.h"
diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
index ca917c71ff60..b3b5fb0ff0a9 100644
--- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
+++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE
 #include <linux/kernel.h>
 #include <sys/syscall.h>
 #include <asm/kvm.h>
diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
index ae1f1a6d8312..fcebd8d81ce4 100644
--- a/tools/testing/selftests/kvm/arch_timer.c
+++ b/tools/testing/selftests/kvm/arch_timer.c
@@ -19,9 +19,6 @@
  *
  * Copyright (c) 2021, Google LLC.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <pthread.h>
 #include <linux/sizes.h>
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index bf3609f71854..0c4d3b6afbf8 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019, Google, Inc.
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index eaad5b20854c..bf1ebc29f22a 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Red Hat, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
index 92eae206baa6..309fe84b84ad 100644
--- a/tools/testing/selftests/kvm/guest_memfd_test.c
+++ b/tools/testing/selftests/kvm/guest_memfd_test.c
@@ -4,8 +4,6 @@
  *
  * Author: Chao Peng <chao.p.peng@linux.intel.com>
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
index decc521fc760..bce73bcb973c 100644
--- a/tools/testing/selftests/kvm/hardware_disable_test.c
+++ b/tools/testing/selftests/kvm/hardware_disable_test.c
@@ -4,9 +4,6 @@
  * kvm_arch_hardware_disable is called and it attempts to unregister the user
  * return notifiers.
  */
-
-#define _GNU_SOURCE
-
 #include <fcntl.h>
 #include <pthread.h>
 #include <semaphore.h>
diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
index 877449c34592..a9d97c213584 100644
--- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
+++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
@@ -5,9 +5,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019-2022 Google LLC
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <time.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
index 698c1cfa3111..f02355c3c4c2 100644
--- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
+++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
@@ -6,8 +6,6 @@
  *
  * Test the fd-based interface for KVM statistics.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
index b9e23265e4b3..c78f34699f73 100644
--- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
+++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
@@ -6,8 +6,6 @@
  *
  * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
index e0ba97ac1c56..7759c685086b 100644
--- a/tools/testing/selftests/kvm/kvm_page_table_test.c
+++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
@@ -8,9 +8,6 @@
  * page size have been pre-allocated on your system, if you are planning to
  * use hugepages to back the guest memory for testing.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
index 2bd25b191d15..b49690658c60 100644
--- a/tools/testing/selftests/kvm/lib/assert.c
+++ b/tools/testing/selftests/kvm/lib/assert.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Google LLC.
  */
-
-#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
-
 #include "test_util.h"
 
 #include <execinfo.h>
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index b2262b5fad9e..1eaf001d0ad4 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2018, Google LLC.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
 #include "test_util.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
index cf2c73971308..555e3932e529 100644
--- a/tools/testing/selftests/kvm/lib/memstress.c
+++ b/tools/testing/selftests/kvm/lib/memstress.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2020, Google LLC.
  */
-#define _GNU_SOURCE
-
 #include <inttypes.h>
 #include <linux/bitmap.h>
 
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index 5a8f8becb129..8ed0b74ae837 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2020, Google LLC.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdarg.h>
 #include <assert.h>
diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
index f4eef6eb2dc2..bd07568a5240 100644
--- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
+++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2019-2022 Google LLC
  */
-
-#define _GNU_SOURCE /* for pipe2 */
-
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
index e248d3364b9c..e83809febae1 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <stdint.h>
 #include <stdbool.h>
 
diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
index 1a6da7389bf1..0b9678858b6d 100644
--- a/tools/testing/selftests/kvm/max_guest_memory_test.c
+++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
index 156361966612..05fcf902e067 100644
--- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
+++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
@@ -6,9 +6,6 @@
  * Copyright (C) 2018, Red Hat, Inc.
  * Copyright (C) 2020, Google, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
index 0f9cabd99fd4..4b5004ef9c6b 100644
--- a/tools/testing/selftests/kvm/riscv/arch_timer.c
+++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
@@ -7,9 +7,6 @@
  *
  * Copyright (c) 2024, Intel Corporation.
  */
-
-#define _GNU_SOURCE
-
 #include "arch_timer.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
index 28f97fb52044..b3536400f9ac 100644
--- a/tools/testing/selftests/kvm/rseq_test.c
+++ b/tools/testing/selftests/kvm/rseq_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
index 626a2b8a2037..84ba79c42ab1 100644
--- a/tools/testing/selftests/kvm/s390x/cmma_test.c
+++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
@@ -7,8 +7,6 @@
  * Authors:
  *  Nico Boehr <nrb@linux.ibm.com>
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
index 43fb25ddc3ec..53def355ccba 100644
--- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
@@ -10,8 +10,6 @@
  *
  * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
index bd57d991e27d..214ff84f6fdb 100644
--- a/tools/testing/selftests/kvm/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/set_memory_region_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <pthread.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
index bae0c5026f82..e9231387c589 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <time.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index eae521f050e0..8e5713e36d4b 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -6,8 +6,6 @@
  *
  * Tests for amx #NM exception and save/restore.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
index 6c2e5e0ceb1f..9c21b6bccc38 100644
--- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
+++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
@@ -4,9 +4,6 @@
  *
  * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "flds_emulation.h"
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
index df351ae17029..10b1b0ba374e 100644
--- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2023, Google LLC.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
index 5c27efbf405e..4f5881d4ef66 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
@@ -7,8 +7,6 @@
  * This work is licensed under the terms of the GNU GPL, version 2.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
index 4c7257ecd2a6..4f3f3a9b038b 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
@@ -4,7 +4,6 @@
  *
  * Tests for Enlightened VMCS, including nested guest state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
index f1617762c22f..8206f5ef42dd 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2022, Red Hat, Inc.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <pthread.h>
 #include <inttypes.h>
 
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
index c9b18707edc0..b987a3d79715 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
@@ -4,7 +4,6 @@
  *
  * Tests for Hyper-V extensions to SVM.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
index 05b56095cf76..077cd0ec3040 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2022, Red Hat, Inc.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <asm/barrier.h>
 #include <pthread.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
index 3670331adf21..3eb0313ffa39 100644
--- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "test_util.h"
 #include "kvm_util.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
index 17bbb96fc4df..e7efb2b35f8b 100644
--- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
@@ -5,9 +5,6 @@
  *
  * Copyright (C) 2022, Google LLC.
  */
-
-#define _GNU_SOURCE
-
 #include <fcntl.h>
 #include <stdint.h>
 #include <time.h>
diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
index 87011965dc41..2165b1ad8b38 100644
--- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
+++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
@@ -9,8 +9,6 @@
  * Verifies expected behavior of controlling guest access to
  * MSR_PLATFORM_INFO.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
index 26c85815f7e9..77f14138594e 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2023, Tencent, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <x86intrin.h>
 
 #include "pmu.h"
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
index 3c85d1ae9893..5ce53b8c46e0 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
@@ -9,9 +9,6 @@
  * Verifies the expected behavior of allow lists and deny lists for
  * virtual PMU events.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "kvm_util.h"
 #include "pmu.h"
 #include "processor.h"
diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
index e0f642d2a3c4..82a8d88b5338 100644
--- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
+++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
@@ -2,7 +2,6 @@
 /*
  * Copyright (C) 2022, Google LLC.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <limits.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
index 366cf18600bc..d691d86e5bc3 100644
--- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
+++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
@@ -4,7 +4,6 @@
  *
  * Copyright (C) 2020, Red Hat, Inc.
  */
-#define _GNU_SOURCE /* for program_invocation_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
index 3610981d9162..c021c0795a96 100644
--- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
@@ -10,7 +10,6 @@
  * That bug allowed a user-mode program that called the KVM_SET_SREGS
  * ioctl to put a VCPU's local APIC into an invalid state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
index 416207c38a17..362be40fc00d 100644
--- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
@@ -5,9 +5,6 @@
  * Test that KVM emulates instructions in response to EPT violations when
  * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
-
 #include "flds_emulation.h"
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
index e18b86666e1f..55c88d664a94 100644
--- a/tools/testing/selftests/kvm/x86_64/smm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
@@ -4,7 +4,6 @@
  *
  * Tests for SMM.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
index 88b58aab7207..1c756db329e5 100644
--- a/tools/testing/selftests/kvm/x86_64/state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/state_test.c
@@ -6,7 +6,6 @@
  *
  * Tests for vCPU state save/restore, including nested guest state.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
index adb5593daf48..8fa3948b0170 100644
--- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
@@ -8,8 +8,6 @@
  * including requesting an invalid register set, updates to/from values
  * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
index dcbb3c29fb8e..abe71946941f 100644
--- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
+++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
@@ -17,8 +17,6 @@
  * delivered into the guest or not.
  *
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <pthread.h>
 #include <inttypes.h>
 #include <string.h>
diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
index f4f61a2d2464..53afbea4df88 100644
--- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
+++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
@@ -4,8 +4,6 @@
  *
  * Tests for exiting into userspace on registered MSRs
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "kvm_test_harness.h"
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
index 977948fd52e6..fa512d033205 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
@@ -4,9 +4,6 @@
  *
  * Copyright (C) 2018, Red Hat, Inc.
  */
-
-#define _GNU_SOURCE /* for program_invocation_name */
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <linux/bitmap.h>
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
index ea0cb3cae0f7..3b93f262b797 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
@@ -10,7 +10,6 @@
  * and check it can be retrieved with KVM_GET_MSR, also test
  * the invalid LBR formats are rejected.
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include <linux/bitmap.h>
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
index affc32800158..00dd2ac07a61 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
@@ -9,7 +9,6 @@
  * value instead of partially decayed timer value
  *
  */
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
index 725c206ba0b9..c78e5f755116 100644
--- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
@@ -19,8 +19,6 @@
  * Migration is a command line option. When used on non-numa machines will 
  * exit with error. Test is still usefull on non-numa for testing IPIs.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <getopt.h>
 #include <pthread.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
index ab75b873a4ad..69849acd95b0 100644
--- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
index 167c97abff1b..f331a4e9bae3 100644
--- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
@@ -4,8 +4,6 @@
  *
  * Tests for the IA32_XSS MSR.
  */
-
-#define _GNU_SOURCE /* for program_invocation_short_name */
 #include <sys/ioctl.h>
 
 #include "test_util.h"
diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
index a6f89aaea77d..bdb3955a9452 100644
--- a/tools/testing/selftests/landlock/base_test.c
+++ b/tools/testing/selftests/landlock/base_test.c
@@ -5,8 +5,6 @@
  * Copyright ? 2017-2020 Micka?l Sala?n <mic@digikod.net>
  * Copyright ? 2019-2020 ANSSI
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/landlock.h>
diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 9a6036fbf289..acec1c82c8b4 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -6,8 +6,6 @@
  * Copyright ? 2020 ANSSI
  * Copyright ? 2020-2022 Microsoft Corporation
  */
-
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <linux/landlock.h>
 #include <linux/magic.h>
diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
index f21cfbbc3638..eed040adcbac 100644
--- a/tools/testing/selftests/landlock/net_test.c
+++ b/tools/testing/selftests/landlock/net_test.c
@@ -5,8 +5,6 @@
  * Copyright ? 2022-2023 Huawei Tech. Co., Ltd.
  * Copyright ? 2023 Microsoft Corporation
  */
-
-#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
index a19db4d0b3bd..c831e6d03b02 100644
--- a/tools/testing/selftests/landlock/ptrace_test.c
+++ b/tools/testing/selftests/landlock/ptrace_test.c
@@ -5,8 +5,6 @@
  * Copyright ? 2017-2020 Micka?l Sala?n <mic@digikod.net>
  * Copyright ? 2019-2020 ANSSI
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/landlock.h>
diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
index 9ad258912646..1b18aac570f1 100644
--- a/tools/testing/selftests/lsm/common.c
+++ b/tools/testing/selftests/lsm/common.c
@@ -4,8 +4,6 @@
  *
  * Copyright ? 2023 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
index df215e4aa63f..7465bde3f922 100644
--- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
index 06d24d4679a6..a6b44e25c21f 100644
--- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
+++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
index 66dec47e3ca3..110c6a07e74c 100644
--- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
+++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
@@ -5,8 +5,6 @@
  *
  * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
  */
-
-#define _GNU_SOURCE
 #include <linux/lsm.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
index af89855adb7b..a8a60b6271a5 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
+++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
@@ -1,5 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
index a9cc17facfb3..b4651e2ade00 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
index 4cdc8b1d124c..17ae5199b916 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <linux/membarrier.h>
 #include <syscall.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
index 8eb3d75f6e60..879d4f4c66fa 100644
--- a/tools/testing/selftests/memfd/common.c
+++ b/tools/testing/selftests/memfd/common.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <stdio.h>
diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
index 93798c8c5d54..15bc189bf831 100644
--- a/tools/testing/selftests/memfd/fuse_test.c
+++ b/tools/testing/selftests/memfd/fuse_test.c
@@ -12,8 +12,6 @@
  * the read() syscall with our memory-mapped memfd object as receive buffer to
  * force the kernel to write into our memfd object.
  */
-
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <errno.h>
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index 18f585684e20..5172c27a8748 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #define __EXPORTED_HEADERS__
 
 #include <errno.h>
diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
index 363bf5f801be..6f1a36d51f19 100644
--- a/tools/testing/selftests/mm/cow.c
+++ b/tools/testing/selftests/mm/cow.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
index ad168d35b23b..3bfd5a630081 100644
--- a/tools/testing/selftests/mm/gup_longterm.c
+++ b/tools/testing/selftests/mm/gup_longterm.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
index 267eea2e0e0b..edb46888222f 100644
--- a/tools/testing/selftests/mm/hugepage-mmap.c
+++ b/tools/testing/selftests/mm/hugepage-mmap.c
@@ -16,7 +16,6 @@
  * range.
  * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
index c463d1c09c9b..8e22822bb754 100644
--- a/tools/testing/selftests/mm/hugepage-mremap.c
+++ b/tools/testing/selftests/mm/hugepage-mremap.c
@@ -11,8 +11,6 @@
  * To make sure the test triggers pmd sharing and goes through the 'unshare'
  * path in the mremap code use 1GB (1024) or more.
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
index e74107185324..70c40c67bc5d 100644
--- a/tools/testing/selftests/mm/hugetlb-madvise.c
+++ b/tools/testing/selftests/mm/hugetlb-madvise.c
@@ -11,8 +11,6 @@
  * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
  * directory.
  */
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
index ba6cc6f9cabc..6b8b41b4f754 100644
--- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
+++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
index 829320a519e7..d18bf400dae6 100644
--- a/tools/testing/selftests/mm/khugepaged.c
+++ b/tools/testing/selftests/mm/khugepaged.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
index d615767e396b..1deae905c42e 100644
--- a/tools/testing/selftests/mm/ksm_functional_tests.c
+++ b/tools/testing/selftests/mm/ksm_functional_tests.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
index 17bcb07f19f3..d19ad13ffd7e 100644
--- a/tools/testing/selftests/mm/madv_populate.c
+++ b/tools/testing/selftests/mm/madv_populate.c
@@ -6,7 +6,6 @@
  *
  * Author(s): David Hildenbrand <david@redhat.com>
  */
-#define _GNU_SOURCE
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
index 5c8a53869b1b..ff4d4079bd0e 100644
--- a/tools/testing/selftests/mm/map_populate.c
+++ b/tools/testing/selftests/mm/map_populate.c
@@ -4,8 +4,6 @@
  *
  * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/mman.h>
diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
index 1e01d3ddc11c..200bedcdc32e 100644
--- a/tools/testing/selftests/mm/mdwe_test.c
+++ b/tools/testing/selftests/mm/mdwe_test.c
@@ -7,7 +7,6 @@
 #include <linux/mman.h>
 #include <linux/prctl.h>
 
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/auxv.h>
diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
index 9b298f6a04b3..750adede2816 100644
--- a/tools/testing/selftests/mm/memfd_secret.c
+++ b/tools/testing/selftests/mm/memfd_secret.c
@@ -4,8 +4,6 @@
  *
  * Author: Mike Rapoport <rppt@linux.ibm.com>
  */
-
-#define _GNU_SOURCE
 #include <sys/uio.h>
 #include <sys/mman.h>
 #include <sys/wait.h>
diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
index 26f744188ad0..42574290d728 100644
--- a/tools/testing/selftests/mm/mlock2-tests.c
+++ b/tools/testing/selftests/mm/mlock2-tests.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sys/mman.h>
 #include <stdint.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
index 100370a7111d..d78bf686e99f 100644
--- a/tools/testing/selftests/mm/mrelease_test.c
+++ b/tools/testing/selftests/mm/mrelease_test.c
@@ -2,7 +2,6 @@
 /*
  * Copyright 2022 Google LLC
  */
-#define _GNU_SOURCE
 #include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
index 1d75084b9ca5..934fa6b441b2 100644
--- a/tools/testing/selftests/mm/mremap_dontunmap.c
+++ b/tools/testing/selftests/mm/mremap_dontunmap.c
@@ -5,7 +5,6 @@
  *
  * Copyright 2020, Brian Geffon <bgeffon@google.com>
  */
-#define _GNU_SOURCE
 #include <sys/mman.h>
 #include <linux/mman.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
index 2f8b991f78cb..e057154630e0 100644
--- a/tools/testing/selftests/mm/mremap_test.c
+++ b/tools/testing/selftests/mm/mremap_test.c
@@ -2,8 +2,6 @@
 /*
  * Copyright 2020 Google LLC
  */
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index d59517ed3d48..2a18b5d276f0 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <fcntl.h>
 #include <string.h>
diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
index 1af3156a9db8..37d6b01ce90a 100644
--- a/tools/testing/selftests/mm/pkey-helpers.h
+++ b/tools/testing/selftests/mm/pkey-helpers.h
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PKEYS_HELPER_H
 #define _PKEYS_HELPER_H
-#define _GNU_SOURCE
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
index 48dc151f8fca..9f7de92caeda 100644
--- a/tools/testing/selftests/mm/protection_keys.c
+++ b/tools/testing/selftests/mm/protection_keys.c
@@ -21,7 +21,6 @@
  *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
  *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
  */
-#define _GNU_SOURCE
 #define __SANE_USERSPACE_TYPES__
 #include <errno.h>
 #include <linux/elf.h>
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index d3c7f5fb3e7b..ae6ac950d7a1 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -3,8 +3,6 @@
  * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
  * address range in a process via <debugfs>/split_huge_pages interface.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
index ea7fd8fe2876..28a5c31bd791 100644
--- a/tools/testing/selftests/mm/thuge-gen.c
+++ b/tools/testing/selftests/mm/thuge-gen.c
@@ -12,8 +12,6 @@
    ipcrm -m by hand, like this
    sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
    (warning this will remove all if someone else uses them) */
-
-#define _GNU_SOURCE 1
 #include <sys/mman.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
index cc5629c3d2aa..abb44319264a 100644
--- a/tools/testing/selftests/mm/uffd-common.h
+++ b/tools/testing/selftests/mm/uffd-common.h
@@ -7,7 +7,6 @@
 #ifndef __UFFD_COMMON_H__
 #define __UFFD_COMMON_H__
 
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
index c6a8c732b802..d894417134b6 100644
--- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
+++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
index bcf51d785a37..bd975670f61d 100644
--- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
+++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
index 79a3dd75590e..279d0c5f70d3 100644
--- a/tools/testing/selftests/net/af_unix/diag_uid.c
+++ b/tools/testing/selftests/net/af_unix/diag_uid.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright Amazon.com Inc. or its affiliates. */
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <unistd.h>
diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
index 7e534594167e..2986b8cd0418 100644
--- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
+++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0 OR MIT
-#define _GNU_SOURCE
 #include <error.h>
 #include <limits.h>
 #include <stddef.h>
diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
index d799fd8f5c7c..34e816862cc7 100644
--- a/tools/testing/selftests/net/af_unix/unix_connect.c
+++ b/tools/testing/selftests/net/af_unix/unix_connect.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <stddef.h>
diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
index 90eb06fefa59..8262aa862331 100644
--- a/tools/testing/selftests/net/csum.c
+++ b/tools/testing/selftests/net/csum.c
@@ -58,9 +58,6 @@
  * different seed for each run (and logs this for reproducibility). It
  * is advised to enable this for extra coverage in continuous testing.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/byteorder.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
index 353e1e867fbb..f5d7032e6466 100644
--- a/tools/testing/selftests/net/gro.c
+++ b/tools/testing/selftests/net/gro.c
@@ -34,9 +34,6 @@
  * flakiness is to be expected.
  *
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
index f9ed749fd8c7..80c9e567a3d8 100644
--- a/tools/testing/selftests/net/ip_defrag.c
+++ b/tools/testing/selftests/net/ip_defrag.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
index be4a30a0d02a..04aa06d26b09 100644
--- a/tools/testing/selftests/net/ipsec.c
+++ b/tools/testing/selftests/net/ipsec.c
@@ -3,9 +3,6 @@
  * ipsec.c - Check xfrm on veth inside a net-ns.
  * Copyright (c) 2018 Dmitry Safonov
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/types.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
index 708a9822259d..b7e0c3c02e20 100644
--- a/tools/testing/selftests/net/ipv6_flowlabel.c
+++ b/tools/testing/selftests/net/ipv6_flowlabel.c
@@ -1,8 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Test IPV6_FLOWINFO cmsg on send and recv */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/byteorder.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
index af95b48acea9..ebd219ba386e 100644
--- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
+++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
@@ -1,8 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Test IPV6_FLOWINFO_MGR */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
index d2043ec3bf6d..ea93030ed3ec 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <limits.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
index 218aac467321..c5bf873d76c2 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
index 926b0be87c99..7203ca9900e9 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
index bdc03a2097e8..9278bf585c80 100644
--- a/tools/testing/selftests/net/msg_zerocopy.c
+++ b/tools/testing/selftests/net/msg_zerocopy.c
@@ -24,9 +24,6 @@
  * the kernel queues completions on the error queue for all zerocopy
  * transfers.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
index cd8a58097448..88e1d3b2ddf1 100644
--- a/tools/testing/selftests/net/nettest.c
+++ b/tools/testing/selftests/net/nettest.c
@@ -3,8 +3,6 @@
  *
  * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
  */
-
-#define _GNU_SOURCE
 #include <features.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
index 1a736f700be4..5b2d34440ae9 100644
--- a/tools/testing/selftests/net/psock_fanout.c
+++ b/tools/testing/selftests/net/psock_fanout.c
@@ -26,9 +26,6 @@
  * Todo:
  * - functionality: PACKET_FANOUT_FLAG_DEFRAG
  */
-
-#define _GNU_SOURCE		/* for sched_setaffinity */
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
index edf1e6f80d41..2f29b513e18f 100644
--- a/tools/testing/selftests/net/psock_snd.c
+++ b/tools/testing/selftests/net/psock_snd.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
index b8475cb29be7..9ee6ece52865 100644
--- a/tools/testing/selftests/net/reuseport_addr_any.c
+++ b/tools/testing/selftests/net/reuseport_addr_any.c
@@ -3,9 +3,6 @@
 /* Test that sockets listening on a specific address are preferred
  * over sockets listening on addr_any.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
index 2d646174729f..e93e38cfb2a8 100644
--- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
+++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
@@ -11,9 +11,6 @@
  * This entire process is done for several different core id permutations
  * and for each IPv4/IPv6 and TCP/UDP combination.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
index c9ba36aa688e..502fdb9ce770 100644
--- a/tools/testing/selftests/net/reuseport_bpf_numa.c
+++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
@@ -3,9 +3,6 @@
  * Test functionality of BPF filters with SO_REUSEPORT. Same test as
  * in reuseport_bpf_cpu, only as one socket per NUMA node.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
index fb7a59ed759e..d3c3d3f39f8f 100644
--- a/tools/testing/selftests/net/reuseport_dualstack.c
+++ b/tools/testing/selftests/net/reuseport_dualstack.c
@@ -10,9 +10,6 @@
  * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
  * AF_INET preference for v4 packets.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
index e9fa14e10732..95bd0cdc3253 100644
--- a/tools/testing/selftests/net/so_incoming_cpu.c
+++ b/tools/testing/selftests/net/so_incoming_cpu.c
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright Amazon.com Inc. or its affiliates. */
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
index b39e87e967cd..18532d564f79 100644
--- a/tools/testing/selftests/net/so_netns_cookie.c
+++ b/tools/testing/selftests/net/so_netns_cookie.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <sched.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
index 8457b7ccbc09..011a24af9786 100644
--- a/tools/testing/selftests/net/so_txtime.c
+++ b/tools/testing/selftests/net/so_txtime.c
@@ -9,9 +9,6 @@
  * the expected stream. Sender will read transmit timestamps from the error
  * queue. The streams can differ due to out-of-order delivery and drops.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
index 247c3b3ac1c9..fa78b92d9740 100644
--- a/tools/testing/selftests/net/tap.c
+++ b/tools/testing/selftests/net/tap.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
index c1cb0c75156a..d30f89bb944c 100644
--- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
+++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
@@ -12,7 +12,6 @@
  * there are no cases in which a cookie is not accepted by verifying
  * that TcpExtTCPFastOpenPassiveFail remains 0.
  */
-#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
index bd6a9c7a3e8a..71ee145f151e 100644
--- a/tools/testing/selftests/net/tcp_inq.c
+++ b/tools/testing/selftests/net/tcp_inq.c
@@ -5,8 +5,6 @@
  *
  * Simple example on how to use TCP_INQ and TCP_CM_INQ.
  */
-#define _GNU_SOURCE
-
 #include <error.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
index 4fcce5150850..72d5f1207ee0 100644
--- a/tools/testing/selftests/net/tcp_mmap.c
+++ b/tools/testing/selftests/net/tcp_mmap.c
@@ -46,7 +46,6 @@
  * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
  *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
  */
-#define _GNU_SOURCE
 #include <pthread.h>
 #include <sys/types.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index f27a12d2a2c9..6dbad97d1d0a 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
index 9ba03164d73a..e2d739892ce4 100644
--- a/tools/testing/selftests/net/toeplitz.c
+++ b/tools/testing/selftests/net/toeplitz.c
@@ -20,9 +20,6 @@
  * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
  * 6. Compare the cpus from 4 and 5
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
index fa83918b62d1..a64dcfb242c1 100644
--- a/tools/testing/selftests/net/tun.c
+++ b/tools/testing/selftests/net/tun.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
index 7d9ea039450a..96972e0110a0 100644
--- a/tools/testing/selftests/net/txring_overwrite.c
+++ b/tools/testing/selftests/net/txring_overwrite.c
@@ -4,9 +4,6 @@
  * Verify that consecutive sends over packet tx_ring are mirrored
  * with their original content intact.
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <assert.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
index ec60a16c9307..33dba9e90dea 100644
--- a/tools/testing/selftests/net/txtimestamp.c
+++ b/tools/testing/selftests/net/txtimestamp.c
@@ -16,9 +16,6 @@
  * This test requires a dummy TCP server.
  * A simple `nc6 [-u] -l -p $DESTPORT` will do
  */
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <asm/types.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
index 85b3baa3f7f3..9dc1026a033a 100644
--- a/tools/testing/selftests/net/udpgso.c
+++ b/tools/testing/selftests/net/udpgso.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <stddef.h>
 #include <arpa/inet.h>
 #include <error.h>
diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
index 1cbadd267c96..999df1236320 100644
--- a/tools/testing/selftests/net/udpgso_bench_rx.c
+++ b/tools/testing/selftests/net/udpgso_bench_rx.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <error.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
index 477392715a9a..d7632993b354 100644
--- a/tools/testing/selftests/net/udpgso_bench_tx.c
+++ b/tools/testing/selftests/net/udpgso_bench_tx.c
@@ -1,7 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
-
 #include <arpa/inet.h>
 #include <errno.h>
 #include <error.h>
diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
index 5814611a1dc7..ef4d923f4759 100644
--- a/tools/testing/selftests/perf_events/remove_on_exec.c
+++ b/tools/testing/selftests/perf_events/remove_on_exec.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2021, Google LLC.
  */
 
-#define _GNU_SOURCE
-
 /* We need the latest siginfo from the kernel repo. */
 #include <sys/types.h>
 #include <asm/siginfo.h>
diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
index d1d8483ac628..14d1a3c8cb5c 100644
--- a/tools/testing/selftests/perf_events/sigtrap_threads.c
+++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
@@ -5,8 +5,6 @@
  * Copyright (C) 2021, Google LLC.
  */
 
-#define _GNU_SOURCE
-
 /* We need the latest siginfo from the kernel repo. */
 #include <sys/types.h>
 #include <asm/siginfo.h>
diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
index 7d84097ad45c..54dc8f16d92a 100644
--- a/tools/testing/selftests/pid_namespace/regression_enomem.c
+++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
index 88d6830ee004..e33177b1aa41 100644
--- a/tools/testing/selftests/pidfd/pidfd.h
+++ b/tools/testing/selftests/pidfd/pidfd.h
@@ -3,7 +3,6 @@
 #ifndef __PIDFD_H
 #define __PIDFD_H
 
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
index 01cc37bf611c..67c9dc436c71 100644
--- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
index cd51d547b751..b6a0e9b3d2f5 100644
--- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
index 8a59438ccc78..781a3931fb5a 100644
--- a/tools/testing/selftests/pidfd/pidfd_open_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
index 610811275357..a40fb27a78bb 100644
--- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/types.h>
 #include <poll.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
index 6e2f2cd400ca..49d7a78cc4fe 100644
--- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
index c081ae91313a..c3d52406b8fd 100644
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
index 0dcb8365ddc3..54beba0983f1 100644
--- a/tools/testing/selftests/pidfd/pidfd_wait.c
+++ b/tools/testing/selftests/pidfd/pidfd_wait.c
@@ -1,6 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
index 5297b10d25c3..054a78ebe8b5 100644
--- a/tools/testing/selftests/ptrace/get_set_sud.c
+++ b/tools/testing/selftests/ptrace/get_set_sud.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include "../kselftest_harness.h"
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
index a6884f66dc01..1b7b77190f72 100644
--- a/tools/testing/selftests/ptrace/peeksiginfo.c
+++ b/tools/testing/selftests/ptrace/peeksiginfo.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <signal.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
index 2348d2c20d0a..5961c24ee1ae 100644
--- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
+++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: LGPL-2.1
-#define _GNU_SOURCE
 #include <assert.h>
 #include <pthread.h>
 #include <sched.h>
diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
index 295eea16466f..1fed749b4bd7 100644
--- a/tools/testing/selftests/rseq/basic_test.c
+++ b/tools/testing/selftests/rseq/basic_test.c
@@ -2,8 +2,6 @@
 /*
  * Basic test coverage for critical regions and rseq_current_cpu().
  */
-
-#define _GNU_SOURCE
 #include <assert.h>
 #include <sched.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
index 2f37961240ca..48a55d94eb72 100644
--- a/tools/testing/selftests/rseq/param_test.c
+++ b/tools/testing/selftests/rseq/param_test.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: LGPL-2.1
-#define _GNU_SOURCE
 #include <assert.h>
 #include <linux/membarrier.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
index 96e812bdf8a4..88602889414c 100644
--- a/tools/testing/selftests/rseq/rseq.c
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -14,8 +14,6 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  */
-
-#define _GNU_SOURCE
 #include <errno.h>
 #include <sched.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
index b83099160fbc..3632a4890da9 100644
--- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
+++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
@@ -2,7 +2,6 @@
  * Strictly speaking, this is not a test. But it can report during test
  * runs so relative performace can be measured.
  */
-#define _GNU_SOURCE
 #include <assert.h>
 #include <err.h>
 #include <limits.h>
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index 783ebce8c4de..972ccc12553e 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -4,8 +4,6 @@
  *
  * Test code for seccomp bpf.
  */
-
-#define _GNU_SOURCE
 #include <sys/types.h>
 
 /*
diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
index 7288a05136ba..a1f156dbbd56 100644
--- a/tools/testing/selftests/user_events/abi_test.c
+++ b/tools/testing/selftests/user_events/abi_test.c
@@ -4,8 +4,6 @@
  *
  * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
  */
-
-#define _GNU_SOURCE
 #include <sched.h>
 
 #include <errno.h>
diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
index d884fd69dd51..9441635fc452 100644
--- a/tools/testing/selftests/x86/amx.c
+++ b/tools/testing/selftests/x86/amx.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <errno.h>
 #include <pthread.h>
diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
index 3bc95f3ed585..0129cdae8abe 100644
--- a/tools/testing/selftests/x86/check_initial_reg_state.c
+++ b/tools/testing/selftests/x86/check_initial_reg_state.c
@@ -3,9 +3,6 @@
  * check_initial_reg_state.c - check that execve sets the correct state
  * Copyright (c) 2014-2016 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdio.h>
 
 unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
index cf9ce8fbb656..d2c746149678 100644
--- a/tools/testing/selftests/x86/corrupt_xstate_header.c
+++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
@@ -4,9 +4,6 @@
  *
  * Based on analysis and a test case from Thomas Gleixner.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
index d1e919b0c1dc..9fa9d4a847ac 100644
--- a/tools/testing/selftests/x86/entry_from_vm86.c
+++ b/tools/testing/selftests/x86/entry_from_vm86.c
@@ -5,9 +5,6 @@
  *
  * This exercises a few paths that need to special-case vm86 mode.
  */
-
-#define _GNU_SOURCE
-
 #include <assert.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
index 8c780cce941d..348134d2cefc 100644
--- a/tools/testing/selftests/x86/fsgsbase.c
+++ b/tools/testing/selftests/x86/fsgsbase.c
@@ -3,8 +3,6 @@
  * fsgsbase.c, an fsgsbase test
  * Copyright (c) 2014-2016 Andy Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
index 6fffadc51579..88dce47ab8e6 100644
--- a/tools/testing/selftests/x86/fsgsbase_restore.c
+++ b/tools/testing/selftests/x86/fsgsbase_restore.c
@@ -12,8 +12,6 @@
  *
  * This is not part of fsgsbase.c, because that test is 64-bit only.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
index 57ec5e99edb9..07b7c10f8d39 100644
--- a/tools/testing/selftests/x86/ioperm.c
+++ b/tools/testing/selftests/x86/ioperm.c
@@ -3,8 +3,6 @@
  * ioperm.c - Test case for ioperm(2)
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
index 7e3e09c1abac..baa691154905 100644
--- a/tools/testing/selftests/x86/iopl.c
+++ b/tools/testing/selftests/x86/iopl.c
@@ -3,8 +3,6 @@
  * iopl.c - Test case for a Linux on Xen 64-bit bug
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
index 215b8150b7cc..39edfd7f6037 100644
--- a/tools/testing/selftests/x86/lam.c
+++ b/tools/testing/selftests/x86/lam.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
index 3a29346e1452..3b4237a85a12 100644
--- a/tools/testing/selftests/x86/ldt_gdt.c
+++ b/tools/testing/selftests/x86/ldt_gdt.c
@@ -3,8 +3,6 @@
  * ldt_gdt.c - Test cases for LDT and GDT access
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
 #include <err.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
index cc3de6ff9fba..47ecc63220b7 100644
--- a/tools/testing/selftests/x86/mov_ss_trap.c
+++ b/tools/testing/selftests/x86/mov_ss_trap.c
@@ -19,8 +19,6 @@
  *
  * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
  */
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <sys/ptrace.h>
 #include <sys/types.h>
diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
index ea4a4e246879..97c5b34096cc 100644
--- a/tools/testing/selftests/x86/nx_stack.c
+++ b/tools/testing/selftests/x86/nx_stack.c
@@ -23,8 +23,6 @@
  * Regular stack is completely overwritten before testing.
  * Test doesn't exit SIGSEGV handler after first fault at INT3.
  */
-#undef _GNU_SOURCE
-#define _GNU_SOURCE
 #undef NDEBUG
 #include <assert.h>
 #include <signal.h>
diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
index 12aaa063196e..bdc81c8bd1a7 100644
--- a/tools/testing/selftests/x86/ptrace_syscall.c
+++ b/tools/testing/selftests/x86/ptrace_syscall.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-
 #include <sys/ptrace.h>
 #include <sys/types.h>
 #include <sys/wait.h>
diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
index f689af75e979..7f41c3a4268b 100644
--- a/tools/testing/selftests/x86/sigaltstack.c
+++ b/tools/testing/selftests/x86/sigaltstack.c
@@ -1,6 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-only
-
-#define _GNU_SOURCE
 #include <signal.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
index 5d7961a5f7f6..2054f729b2c2 100644
--- a/tools/testing/selftests/x86/sigreturn.c
+++ b/tools/testing/selftests/x86/sigreturn.c
@@ -24,9 +24,6 @@
  *
  * Do not run on outdated, unpatched kernels at risk of nasty crashes.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/time.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
index 9a30f443e928..375f3b50a0b5 100644
--- a/tools/testing/selftests/x86/single_step_syscall.c
+++ b/tools/testing/selftests/x86/single_step_syscall.c
@@ -9,9 +9,6 @@
  * immediately issues #DB from CPL 0.  This requires special handling in
  * the kernel.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/time.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
index 461fa41a4d02..10eee1bcd015 100644
--- a/tools/testing/selftests/x86/syscall_arg_fault.c
+++ b/tools/testing/selftests/x86/syscall_arg_fault.c
@@ -3,9 +3,6 @@
  * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
  * Copyright (c) 2015 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
index 991591718bb0..c72fc8aaa4d3 100644
--- a/tools/testing/selftests/x86/syscall_numbering.c
+++ b/tools/testing/selftests/x86/syscall_numbering.c
@@ -5,9 +5,6 @@
  *
  * Copyright (c) 2018 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
index 84d74be1d902..24bc219358a5 100644
--- a/tools/testing/selftests/x86/sysret_rip.c
+++ b/tools/testing/selftests/x86/sysret_rip.c
@@ -3,9 +3,6 @@
  * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
  * Copyright (c) 2014-2016 Andrew Lutomirski
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
index 5f3d4fca440f..f8b9e0b2a0c5 100644
--- a/tools/testing/selftests/x86/sysret_ss_attrs.c
+++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
@@ -7,9 +7,6 @@
  * the hidden attributes set to an unusable state.  Make sure the kernel
  * doesn't let this happen.
  */
-
-#define _GNU_SOURCE
-
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
index 6b5036fbb735..0c9431ba7d31 100644
--- a/tools/testing/selftests/x86/test_FCMOV.c
+++ b/tools/testing/selftests/x86/test_FCMOV.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
index aec6692c6dcf..ba186665918d 100644
--- a/tools/testing/selftests/x86/test_FCOMI.c
+++ b/tools/testing/selftests/x86/test_FCOMI.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
index 09789c0ce3e9..95580cdaaa32 100644
--- a/tools/testing/selftests/x86/test_FISTTP.c
+++ b/tools/testing/selftests/x86/test_FISTTP.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
index f0d876d48277..a8bdba356682 100644
--- a/tools/testing/selftests/x86/test_mremap_vdso.c
+++ b/tools/testing/selftests/x86/test_mremap_vdso.c
@@ -9,7 +9,6 @@
  * Can be built statically:
  * gcc -Os -Wall -static -m32 test_mremap_vdso.c
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
index 757e6527f67e..0ceca9064cec 100644
--- a/tools/testing/selftests/x86/test_shadow_stack.c
+++ b/tools/testing/selftests/x86/test_shadow_stack.c
@@ -7,9 +7,6 @@
  * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
  * stick to the basics and hope the compiler doesn't do anything strange.
  */
-
-#define _GNU_SOURCE
-
 #include <sys/syscall.h>
 #include <asm/mman.h>
 #include <sys/mman.h>
diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
index 8965c311bd65..5cd13279bba5 100644
--- a/tools/testing/selftests/x86/test_syscall_vdso.c
+++ b/tools/testing/selftests/x86/test_syscall_vdso.c
@@ -8,10 +8,6 @@
  * Can be built statically:
  * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
  */
-#undef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#undef __USE_GNU
-#define __USE_GNU 1
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index 47cab972807c..cbf4e5012005 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -1,7 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-
-#define _GNU_SOURCE
-
 #include <stdio.h>
 #include <sys/time.h>
 #include <time.h>
diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
index 4c311e1af4c7..754f5d4d425a 100644
--- a/tools/testing/selftests/x86/unwind_vdso.c
+++ b/tools/testing/selftests/x86/unwind_vdso.c
@@ -5,9 +5,6 @@
  *
  * This tests __kernel_vsyscall's unwind info.
  */
-
-#define _GNU_SOURCE
-
 #include <features.h>
 #include <stdio.h>
 
diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
index fe99f2434155..8193de22a390 100644
--- a/tools/testing/selftests/x86/vdso_restorer.c
+++ b/tools/testing/selftests/x86/vdso_restorer.c
@@ -10,9 +10,6 @@
  * 64-bit userspace has never supported sa_restorer == NULL, so this is
  * 32-bit only.
  */
-
-#define _GNU_SOURCE
-
 #include <err.h>
 #include <stdio.h>
 #include <dlfcn.h>
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>  tools/testing/selftests/capabilities/test_execve.c            | 2 --
>  tools/testing/selftests/clone3/clone3.c                       | 2 --
>  .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>  tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>  tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>  tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>  tools/testing/selftests/core/close_range_test.c               | 2 --
>  tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>  tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>  tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>  tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>  tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>  tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>  tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>  tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>  tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>  .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>  tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>  tools/testing/selftests/ipc/msgque.c                          | 1 -
>  tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>  tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>  tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>  tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>  tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>  tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>  tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>  tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>  tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>  tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>  tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>  tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>  tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>  tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>  tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>  tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>  tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>  tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>  tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>  tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>  tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>  .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>  tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>  tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>  tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>  tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>  tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>  tools/testing/selftests/kvm/steal_time.c                      | 1 -
>  tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>  .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>  tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>  tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>  tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>  tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>  tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>  tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>  tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>  tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>  .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>  tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>  tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>  .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>  tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>  tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>  tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>  tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>  tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>  tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>  tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>  .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>  tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>  tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>  tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>  tools/testing/selftests/landlock/base_test.c                  | 2 --
>  tools/testing/selftests/landlock/fs_test.c                    | 2 --
>  tools/testing/selftests/landlock/net_test.c                   | 2 --
>  tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>  tools/testing/selftests/lsm/common.c                          | 2 --
>  tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>  tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>  tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>  tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>  .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>  .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>  tools/testing/selftests/memfd/common.c                        | 1 -
>  tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>  tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>  tools/testing/selftests/mm/cow.c                              | 1 -
>  tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>  tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>  tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>  tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>  tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>  tools/testing/selftests/mm/khugepaged.c                       | 1 -
>  tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>  tools/testing/selftests/mm/madv_populate.c                    | 1 -
>  tools/testing/selftests/mm/map_populate.c                     | 2 --
>  tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>  tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>  tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>  tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>  tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>  tools/testing/selftests/mm/mremap_test.c                      | 2 --
>  tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>  tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>  tools/testing/selftests/mm/protection_keys.c                  | 1 -
>  tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>  tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>  tools/testing/selftests/mm/uffd-common.h                      | 1 -
>  tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>  .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>  tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>  tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>  tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>  tools/testing/selftests/net/csum.c                            | 3 ---
>  tools/testing/selftests/net/gro.c                             | 3 ---
>  tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>  tools/testing/selftests/net/ipsec.c                           | 3 ---
>  tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>  tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>  tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>  tools/testing/selftests/net/nettest.c                         | 2 --
>  tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>  tools/testing/selftests/net/psock_snd.c                       | 3 ---
>  tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>  tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>  tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>  tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>  tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>  tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>  tools/testing/selftests/net/so_txtime.c                       | 3 ---
>  tools/testing/selftests/net/tap.c                             | 3 ---
>  tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>  tools/testing/selftests/net/tcp_inq.c                         | 2 --
>  tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>  tools/testing/selftests/net/tls.c                             | 3 ---
>  tools/testing/selftests/net/toeplitz.c                        | 3 ---
>  tools/testing/selftests/net/tun.c                             | 3 ---
>  tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>  tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>  tools/testing/selftests/net/udpgso.c                          | 3 ---
>  tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>  tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>  tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>  tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>  tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>  tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>  tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>  tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>  tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>  tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>  tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>  tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>  tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>  tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>  tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>  tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>  tools/testing/selftests/rseq/basic_test.c                     | 2 --
>  tools/testing/selftests/rseq/param_test.c                     | 1 -
>  tools/testing/selftests/rseq/rseq.c                           | 2 --
>  tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>  tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>  tools/testing/selftests/user_events/abi_test.c                | 2 --
>  tools/testing/selftests/x86/amx.c                             | 2 --
>  tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>  tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>  tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>  tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>  tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>  tools/testing/selftests/x86/ioperm.c                          | 2 --
>  tools/testing/selftests/x86/iopl.c                            | 2 --
>  tools/testing/selftests/x86/lam.c                             | 1 -
>  tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>  tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>  tools/testing/selftests/x86/nx_stack.c                        | 2 --
>  tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>  tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>  tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>  tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>  tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>  tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>  tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>  tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>  tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>  tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>  tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>  tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>  tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>  tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>  tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>  tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>  tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>  198 files changed, 405 deletions(-)
> 
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index b171fd53b004..c1a6ce7b0912 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdbool.h>
>  #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
> index 7cde07a5df78..e3954b88c3ee 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <cap-ng.h>
>  #include <linux/capability.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 3c9bf0cd82a8..3c5e45dae617 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -1,8 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  
>  /* Based on Christian Brauner's clone3() example */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <inttypes.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> index 31b56d625655..bb99ea20f7d5 100644
> --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> @@ -7,8 +7,6 @@
>   */
>  
>  /* capabilities related code based on selftests/bpf/test_verifier.c */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <linux/sched.h>
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 54a8b2445be9..50336d56db6b 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <sched.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
> index 3d2663fe50ba..172e19d5515f 100644
> --- a/tools/testing/selftests/clone3/clone3_selftests.h
> +++ b/tools/testing/selftests/clone3/clone3_selftests.h
> @@ -3,7 +3,6 @@
>  #ifndef _CLONE3_SELFTESTS_H
>  #define _CLONE3_SELFTESTS_H
>  
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <linux/sched.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index ed785afb6077..8b5ed4484ee6 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -5,8 +5,6 @@
>   * These tests are assuming to be running in the host's
>   * PID namespace.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <linux/sched.h>
> diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
> index c59e4adb905d..1c2902bcc913 100644
> --- a/tools/testing/selftests/core/close_range_test.c
> +++ b/tools/testing/selftests/core/close_range_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> index c812080e304e..7c8dbab8ac44 100644
> --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> +++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> index e0319417124d..6b411859c2cd 100644
> --- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <sys/stat.h>
>  #include <sys/types.h>
> diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> index 5f362c0fd890..fca693db1b09 100644
> --- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
> index b1fc9b916ace..73766447eeb0 100644
> --- a/tools/testing/selftests/filesystems/devpts_pts.c
> +++ b/tools/testing/selftests/filesystems/devpts_pts.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
> index c0a9b2d3302d..05367a70b963 100644
> --- a/tools/testing/selftests/filesystems/dnotify_test.c
> +++ b/tools/testing/selftests/filesystems/dnotify_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE	/* needed to get the defines */
>  #include <fcntl.h>	/* in glibc 2.2 this has the needed
>  				   values defined */
>  #include <signal.h>
> diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> index 65ede506305c..9bc2ddad7e92 100644
> --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <asm/unistd.h>
>  #include <linux/time_types.h>
>  #include <poll.h>
> diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> index f142a137526c..17935f42fbc9 100644
> --- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> +++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <asm/unistd.h>
> diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> index e488ad354fce..56cf3ad8640d 100644
> --- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
> +++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> @@ -6,8 +6,6 @@
>   * Copyright 2022 Red Hat Inc.
>   * Author: Javier Martinez Canillas <javierm@redhat.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> index 759f86e7d263..b58a80bde95a 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> +++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <inttypes.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> index 3eafd7da58e2..d1cefd1b7d16 100644
> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <stdint.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> index 7f3ca5c78df1..8e41f9fe784c 100644
> --- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> +++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> @@ -16,9 +16,6 @@
>   *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
>   *
>   *****************************************************************************/
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <limits.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..291c81d59a9d 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 25110c7c0b3e..885c9e943cee 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> index 4eaba83cdcf3..5369959e9fc2 100644
> --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
> +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright (c) 2021, Google LLC.
>   */
> -#define _GNU_SOURCE
> -
>  #include "arch_timer.h"
>  #include "delay.h"
>  #include "gic.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> index 5972905275cf..79e99f47a9fe 100644
> --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> @@ -7,7 +7,6 @@
>   * hugetlbfs with a hole). It checks that the expected handling method is
>   * called (e.g., uffd faults with the right address and write/read flag).
>   */
> -#define _GNU_SOURCE
>  #include <linux/bitmap.h>
>  #include <fcntl.h>
>  #include <test_util.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> index 9b004905d1d3..1c8c6f0c1ca3 100644
> --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> @@ -10,9 +10,6 @@
>   *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
>   *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <linux/psci.h>
>  
>  #include "kvm_util.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index ca917c71ff60..b3b5fb0ff0a9 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE
>  #include <linux/kernel.h>
>  #include <sys/syscall.h>
>  #include <asm/kvm.h>
> diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
> index ae1f1a6d8312..fcebd8d81ce4 100644
> --- a/tools/testing/selftests/kvm/arch_timer.c
> +++ b/tools/testing/selftests/kvm/arch_timer.c
> @@ -19,9 +19,6 @@
>   *
>   * Copyright (c) 2021, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <pthread.h>
>  #include <linux/sizes.h>
> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
> index bf3609f71854..0c4d3b6afbf8 100644
> --- a/tools/testing/selftests/kvm/demand_paging_test.c
> +++ b/tools/testing/selftests/kvm/demand_paging_test.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019, Google, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
> index eaad5b20854c..bf1ebc29f22a 100644
> --- a/tools/testing/selftests/kvm/dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/dirty_log_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Red Hat, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index 92eae206baa6..309fe84b84ad 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Author: Chao Peng <chao.p.peng@linux.intel.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
> index decc521fc760..bce73bcb973c 100644
> --- a/tools/testing/selftests/kvm/hardware_disable_test.c
> +++ b/tools/testing/selftests/kvm/hardware_disable_test.c
> @@ -4,9 +4,6 @@
>   * kvm_arch_hardware_disable is called and it attempts to unregister the user
>   * return notifiers.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <fcntl.h>
>  #include <pthread.h>
>  #include <semaphore.h>
> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> index 877449c34592..a9d97c213584 100644
> --- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -5,9 +5,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019-2022 Google LLC
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <time.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> index 698c1cfa3111..f02355c3c4c2 100644
> --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> @@ -6,8 +6,6 @@
>   *
>   * Test the fd-based interface for KVM statistics.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> index b9e23265e4b3..c78f34699f73 100644
> --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> @@ -6,8 +6,6 @@
>   *
>   * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
> index e0ba97ac1c56..7759c685086b 100644
> --- a/tools/testing/selftests/kvm/kvm_page_table_test.c
> +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
> @@ -8,9 +8,6 @@
>   * page size have been pre-allocated on your system, if you are planning to
>   * use hugepages to back the guest memory for testing.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
> index 2bd25b191d15..b49690658c60 100644
> --- a/tools/testing/selftests/kvm/lib/assert.c
> +++ b/tools/testing/selftests/kvm/lib/assert.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
> -
>  #include "test_util.h"
>  
>  #include <execinfo.h>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index b2262b5fad9e..1eaf001d0ad4 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (C) 2018, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
>  #include "test_util.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
> index cf2c73971308..555e3932e529 100644
> --- a/tools/testing/selftests/kvm/lib/memstress.c
> +++ b/tools/testing/selftests/kvm/lib/memstress.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2020, Google LLC.
>   */
> -#define _GNU_SOURCE
> -
>  #include <inttypes.h>
>  #include <linux/bitmap.h>
>  
> diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
> index 5a8f8becb129..8ed0b74ae837 100644
> --- a/tools/testing/selftests/kvm/lib/test_util.c
> +++ b/tools/testing/selftests/kvm/lib/test_util.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (C) 2020, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdarg.h>
>  #include <assert.h>
> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> index f4eef6eb2dc2..bd07568a5240 100644
> --- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019-2022 Google LLC
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> index e248d3364b9c..e83809febae1 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <stdint.h>
>  #include <stdbool.h>
>  
> diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
> index 1a6da7389bf1..0b9678858b6d 100644
> --- a/tools/testing/selftests/kvm/max_guest_memory_test.c
> +++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> index 156361966612..05fcf902e067 100644
> --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2020, Google, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..4b5004ef9c6b 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -7,9 +7,6 @@
>   *
>   * Copyright (c) 2024, Intel Corporation.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include "arch_timer.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
> index 28f97fb52044..b3536400f9ac 100644
> --- a/tools/testing/selftests/kvm/rseq_test.c
> +++ b/tools/testing/selftests/kvm/rseq_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
> index 626a2b8a2037..84ba79c42ab1 100644
> --- a/tools/testing/selftests/kvm/s390x/cmma_test.c
> +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
> @@ -7,8 +7,6 @@
>   * Authors:
>   *  Nico Boehr <nrb@linux.ibm.com>
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> index 43fb25ddc3ec..53def355ccba 100644
> --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> @@ -10,8 +10,6 @@
>   *
>   * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index bd57d991e27d..214ff84f6fdb 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <pthread.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
> index bae0c5026f82..e9231387c589 100644
> --- a/tools/testing/selftests/kvm/steal_time.c
> +++ b/tools/testing/selftests/kvm/steal_time.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <time.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
> index eae521f050e0..8e5713e36d4b 100644
> --- a/tools/testing/selftests/kvm/x86_64/amx_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
> @@ -6,8 +6,6 @@
>   *
>   * Tests for amx #NM exception and save/restore.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> index 6c2e5e0ceb1f..9c21b6bccc38 100644
> --- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "flds_emulation.h"
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> index df351ae17029..10b1b0ba374e 100644
> --- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2023, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> index 5c27efbf405e..4f5881d4ef66 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> @@ -7,8 +7,6 @@
>   * This work is licensed under the terms of the GNU GPL, version 2.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> index 4c7257ecd2a6..4f3f3a9b038b 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for Enlightened VMCS, including nested guest state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> index f1617762c22f..8206f5ef42dd 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2022, Red Hat, Inc.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <pthread.h>
>  #include <inttypes.h>
>  
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> index c9b18707edc0..b987a3d79715 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for Hyper-V extensions to SVM.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> index 05b56095cf76..077cd0ec3040 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2022, Red Hat, Inc.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <asm/barrier.h>
>  #include <pthread.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> index 3670331adf21..3eb0313ffa39 100644
> --- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "test_util.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> index 17bbb96fc4df..e7efb2b35f8b 100644
> --- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> @@ -5,9 +5,6 @@
>   *
>   * Copyright (C) 2022, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <fcntl.h>
>  #include <stdint.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> index 87011965dc41..2165b1ad8b38 100644
> --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> @@ -9,8 +9,6 @@
>   * Verifies expected behavior of controlling guest access to
>   * MSR_PLATFORM_INFO.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 26c85815f7e9..77f14138594e 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2023, Tencent, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <x86intrin.h>
>  
>  #include "pmu.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index 3c85d1ae9893..5ce53b8c46e0 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -9,9 +9,6 @@
>   * Verifies the expected behavior of allow lists and deny lists for
>   * virtual PMU events.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "kvm_util.h"
>  #include "pmu.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> index e0f642d2a3c4..82a8d88b5338 100644
> --- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> @@ -2,7 +2,6 @@
>  /*
>   * Copyright (C) 2022, Google LLC.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <limits.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> index 366cf18600bc..d691d86e5bc3 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE /* for program_invocation_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> index 3610981d9162..c021c0795a96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> @@ -10,7 +10,6 @@
>   * That bug allowed a user-mode program that called the KVM_SET_SREGS
>   * ioctl to put a VCPU's local APIC into an invalid state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> index 416207c38a17..362be40fc00d 100644
> --- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> @@ -5,9 +5,6 @@
>   * Test that KVM emulates instructions in response to EPT violations when
>   * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "flds_emulation.h"
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
> index e18b86666e1f..55c88d664a94 100644
> --- a/tools/testing/selftests/kvm/x86_64/smm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for SMM.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
> index 88b58aab7207..1c756db329e5 100644
> --- a/tools/testing/selftests/kvm/x86_64/state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/state_test.c
> @@ -6,7 +6,6 @@
>   *
>   * Tests for vCPU state save/restore, including nested guest state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> index adb5593daf48..8fa3948b0170 100644
> --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> @@ -8,8 +8,6 @@
>   * including requesting an invalid register set, updates to/from values
>   * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> index dcbb3c29fb8e..abe71946941f 100644
> --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> @@ -17,8 +17,6 @@
>   * delivered into the guest or not.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <pthread.h>
>  #include <inttypes.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> index f4f61a2d2464..53afbea4df88 100644
> --- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Tests for exiting into userspace on registered MSRs
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "kvm_test_harness.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> index 977948fd52e6..fa512d033205 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Red Hat, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> index ea0cb3cae0f7..3b93f262b797 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> @@ -10,7 +10,6 @@
>   * and check it can be retrieved with KVM_GET_MSR, also test
>   * the invalid LBR formats are rejected.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> index affc32800158..00dd2ac07a61 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> @@ -9,7 +9,6 @@
>   * value instead of partially decayed timer value
>   *
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> index 725c206ba0b9..c78e5f755116 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> @@ -19,8 +19,6 @@
>   * Migration is a command line option. When used on non-numa machines will 
>   * exit with error. Test is still usefull on non-numa for testing IPIs.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <getopt.h>
>  #include <pthread.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> index ab75b873a4ad..69849acd95b0 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> index 167c97abff1b..f331a4e9bae3 100644
> --- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Tests for the IA32_XSS MSR.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index a6f89aaea77d..bdb3955a9452 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>   * Copyright © 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 9a6036fbf289..acec1c82c8b4 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>   * Copyright © 2020 ANSSI
>   * Copyright © 2020-2022 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <linux/landlock.h>
>  #include <linux/magic.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
>   * Copyright © 2023 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>   * Copyright © 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
> index 9ad258912646..1b18aac570f1 100644
> --- a/tools/testing/selftests/lsm/common.c
> +++ b/tools/testing/selftests/lsm/common.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright © 2023 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> index df215e4aa63f..7465bde3f922 100644
> --- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> index 06d24d4679a6..a6b44e25c21f 100644
> --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
> +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <string.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> index 66dec47e3ca3..110c6a07e74c 100644
> --- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <string.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> index af89855adb7b..a8a60b6271a5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
> +++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> @@ -1,5 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index a9cc17facfb3..b4651e2ade00 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index 4cdc8b1d124c..17ae5199b916 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
> index 8eb3d75f6e60..879d4f4c66fa 100644
> --- a/tools/testing/selftests/memfd/common.c
> +++ b/tools/testing/selftests/memfd/common.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
> index 93798c8c5d54..15bc189bf831 100644
> --- a/tools/testing/selftests/memfd/fuse_test.c
> +++ b/tools/testing/selftests/memfd/fuse_test.c
> @@ -12,8 +12,6 @@
>   * the read() syscall with our memory-mapped memfd object as receive buffer to
>   * force the kernel to write into our memfd object.
>   */
> -
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index 18f585684e20..5172c27a8748 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 363bf5f801be..6f1a36d51f19 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
> index ad168d35b23b..3bfd5a630081 100644
> --- a/tools/testing/selftests/mm/gup_longterm.c
> +++ b/tools/testing/selftests/mm/gup_longterm.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
> index 267eea2e0e0b..edb46888222f 100644
> --- a/tools/testing/selftests/mm/hugepage-mmap.c
> +++ b/tools/testing/selftests/mm/hugepage-mmap.c
> @@ -16,7 +16,6 @@
>   * range.
>   * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
> index c463d1c09c9b..8e22822bb754 100644
> --- a/tools/testing/selftests/mm/hugepage-mremap.c
> +++ b/tools/testing/selftests/mm/hugepage-mremap.c
> @@ -11,8 +11,6 @@
>   * To make sure the test triggers pmd sharing and goes through the 'unshare'
>   * path in the mremap code use 1GB (1024) or more.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index e74107185324..70c40c67bc5d 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -11,8 +11,6 @@
>   * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
>   * directory.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> index ba6cc6f9cabc..6b8b41b4f754 100644
> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
> index 829320a519e7..d18bf400dae6 100644
> --- a/tools/testing/selftests/mm/khugepaged.c
> +++ b/tools/testing/selftests/mm/khugepaged.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>  #include <ctype.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
> index d615767e396b..1deae905c42e 100644
> --- a/tools/testing/selftests/mm/ksm_functional_tests.c
> +++ b/tools/testing/selftests/mm/ksm_functional_tests.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
> index 17bcb07f19f3..d19ad13ffd7e 100644
> --- a/tools/testing/selftests/mm/madv_populate.c
> +++ b/tools/testing/selftests/mm/madv_populate.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
> index 5c8a53869b1b..ff4d4079bd0e 100644
> --- a/tools/testing/selftests/mm/map_populate.c
> +++ b/tools/testing/selftests/mm/map_populate.c
> @@ -4,8 +4,6 @@
>   *
>   * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sys/mman.h>
> diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
> index 1e01d3ddc11c..200bedcdc32e 100644
> --- a/tools/testing/selftests/mm/mdwe_test.c
> +++ b/tools/testing/selftests/mm/mdwe_test.c
> @@ -7,7 +7,6 @@
>  #include <linux/mman.h>
>  #include <linux/prctl.h>
>  
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <sys/auxv.h>
> diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
> index 9b298f6a04b3..750adede2816 100644
> --- a/tools/testing/selftests/mm/memfd_secret.c
> +++ b/tools/testing/selftests/mm/memfd_secret.c
> @@ -4,8 +4,6 @@
>   *
>   * Author: Mike Rapoport <rppt@linux.ibm.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <sys/uio.h>
>  #include <sys/mman.h>
>  #include <sys/wait.h>
> diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
> index 26f744188ad0..42574290d728 100644
> --- a/tools/testing/selftests/mm/mlock2-tests.c
> +++ b/tools/testing/selftests/mm/mlock2-tests.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sys/mman.h>
>  #include <stdint.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
> index 100370a7111d..d78bf686e99f 100644
> --- a/tools/testing/selftests/mm/mrelease_test.c
> +++ b/tools/testing/selftests/mm/mrelease_test.c
> @@ -2,7 +2,6 @@
>  /*
>   * Copyright 2022 Google LLC
>   */
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <stdbool.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
> index 1d75084b9ca5..934fa6b441b2 100644
> --- a/tools/testing/selftests/mm/mremap_dontunmap.c
> +++ b/tools/testing/selftests/mm/mremap_dontunmap.c
> @@ -5,7 +5,6 @@
>   *
>   * Copyright 2020, Brian Geffon <bgeffon@google.com>
>   */
> -#define _GNU_SOURCE
>  #include <sys/mman.h>
>  #include <linux/mman.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
> index 2f8b991f78cb..e057154630e0 100644
> --- a/tools/testing/selftests/mm/mremap_test.c
> +++ b/tools/testing/selftests/mm/mremap_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright 2020 Google LLC
>   */
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
> index d59517ed3d48..2a18b5d276f0 100644
> --- a/tools/testing/selftests/mm/pagemap_ioctl.c
> +++ b/tools/testing/selftests/mm/pagemap_ioctl.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 1af3156a9db8..37d6b01ce90a 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -1,7 +1,6 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
>  #ifndef _PKEYS_HELPER_H
>  #define _PKEYS_HELPER_H
> -#define _GNU_SOURCE
>  #include <string.h>
>  #include <stdarg.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
> index 48dc151f8fca..9f7de92caeda 100644
> --- a/tools/testing/selftests/mm/protection_keys.c
> +++ b/tools/testing/selftests/mm/protection_keys.c
> @@ -21,7 +21,6 @@
>   *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>   *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>   */
> -#define _GNU_SOURCE
>  #define __SANE_USERSPACE_TYPES__
>  #include <errno.h>
>  #include <linux/elf.h>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index d3c7f5fb3e7b..ae6ac950d7a1 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -3,8 +3,6 @@
>   * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
>   * address range in a process via <debugfs>/split_huge_pages interface.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdarg.h>
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index ea7fd8fe2876..28a5c31bd791 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -12,8 +12,6 @@
>     ipcrm -m by hand, like this
>     sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
>     (warning this will remove all if someone else uses them) */
> -
> -#define _GNU_SOURCE 1
>  #include <sys/mman.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
> index cc5629c3d2aa..abb44319264a 100644
> --- a/tools/testing/selftests/mm/uffd-common.h
> +++ b/tools/testing/selftests/mm/uffd-common.h
> @@ -7,7 +7,6 @@
>  #ifndef __UFFD_COMMON_H__
>  #define __UFFD_COMMON_H__
>  
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <errno.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index c6a8c732b802..d894417134b6 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <stdio.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> index bcf51d785a37..bd975670f61d 100644
> --- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> +++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <stdio.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
> index 79a3dd75590e..279d0c5f70d3 100644
> --- a/tools/testing/selftests/net/af_unix/diag_uid.c
> +++ b/tools/testing/selftests/net/af_unix/diag_uid.c
> @@ -1,7 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright Amazon.com Inc. or its affiliates. */
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> index 7e534594167e..2986b8cd0418 100644
> --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
> +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0 OR MIT
> -#define _GNU_SOURCE
>  #include <error.h>
>  #include <limits.h>
>  #include <stddef.h>
> diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
> index d799fd8f5c7c..34e816862cc7 100644
> --- a/tools/testing/selftests/net/af_unix/unix_connect.c
> +++ b/tools/testing/selftests/net/af_unix/unix_connect.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <stddef.h>
> diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
> index 90eb06fefa59..8262aa862331 100644
> --- a/tools/testing/selftests/net/csum.c
> +++ b/tools/testing/selftests/net/csum.c
> @@ -58,9 +58,6 @@
>   * different seed for each run (and logs this for reproducibility). It
>   * is advised to enable this for extra coverage in continuous testing.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/byteorder.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
> index 353e1e867fbb..f5d7032e6466 100644
> --- a/tools/testing/selftests/net/gro.c
> +++ b/tools/testing/selftests/net/gro.c
> @@ -34,9 +34,6 @@
>   * flakiness is to be expected.
>   *
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
> index f9ed749fd8c7..80c9e567a3d8 100644
> --- a/tools/testing/selftests/net/ip_defrag.c
> +++ b/tools/testing/selftests/net/ip_defrag.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
> index be4a30a0d02a..04aa06d26b09 100644
> --- a/tools/testing/selftests/net/ipsec.c
> +++ b/tools/testing/selftests/net/ipsec.c
> @@ -3,9 +3,6 @@
>   * ipsec.c - Check xfrm on veth inside a net-ns.
>   * Copyright (c) 2018 Dmitry Safonov
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/types.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
> index 708a9822259d..b7e0c3c02e20 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel.c
> @@ -1,8 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Test IPV6_FLOWINFO cmsg on send and recv */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/byteorder.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> index af95b48acea9..ebd219ba386e 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> @@ -1,8 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Test IPV6_FLOWINFO_MGR */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index d2043ec3bf6d..ea93030ed3ec 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <limits.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> index 218aac467321..c5bf873d76c2 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> index 926b0be87c99..7203ca9900e9 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
> index bdc03a2097e8..9278bf585c80 100644
> --- a/tools/testing/selftests/net/msg_zerocopy.c
> +++ b/tools/testing/selftests/net/msg_zerocopy.c
> @@ -24,9 +24,6 @@
>   * the kernel queues completions on the error queue for all zerocopy
>   * transfers.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
> index cd8a58097448..88e1d3b2ddf1 100644
> --- a/tools/testing/selftests/net/nettest.c
> +++ b/tools/testing/selftests/net/nettest.c
> @@ -3,8 +3,6 @@
>   *
>   * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
>   */
> -
> -#define _GNU_SOURCE
>  #include <features.h>
>  #include <sys/types.h>
>  #include <sys/ioctl.h>
> diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
> index 1a736f700be4..5b2d34440ae9 100644
> --- a/tools/testing/selftests/net/psock_fanout.c
> +++ b/tools/testing/selftests/net/psock_fanout.c
> @@ -26,9 +26,6 @@
>   * Todo:
>   * - functionality: PACKET_FANOUT_FLAG_DEFRAG
>   */
> -
> -#define _GNU_SOURCE		/* for sched_setaffinity */
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
> index edf1e6f80d41..2f29b513e18f 100644
> --- a/tools/testing/selftests/net/psock_snd.c
> +++ b/tools/testing/selftests/net/psock_snd.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
> index b8475cb29be7..9ee6ece52865 100644
> --- a/tools/testing/selftests/net/reuseport_addr_any.c
> +++ b/tools/testing/selftests/net/reuseport_addr_any.c
> @@ -3,9 +3,6 @@
>  /* Test that sockets listening on a specific address are preferred
>   * over sockets listening on addr_any.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> index 2d646174729f..e93e38cfb2a8 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> @@ -11,9 +11,6 @@
>   * This entire process is done for several different core id permutations
>   * and for each IPv4/IPv6 and TCP/UDP combination.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
> index c9ba36aa688e..502fdb9ce770 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_numa.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
> @@ -3,9 +3,6 @@
>   * Test functionality of BPF filters with SO_REUSEPORT. Same test as
>   * in reuseport_bpf_cpu, only as one socket per NUMA node.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
> index fb7a59ed759e..d3c3d3f39f8f 100644
> --- a/tools/testing/selftests/net/reuseport_dualstack.c
> +++ b/tools/testing/selftests/net/reuseport_dualstack.c
> @@ -10,9 +10,6 @@
>   * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
>   * AF_INET preference for v4 packets.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
> index e9fa14e10732..95bd0cdc3253 100644
> --- a/tools/testing/selftests/net/so_incoming_cpu.c
> +++ b/tools/testing/selftests/net/so_incoming_cpu.c
> @@ -1,6 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright Amazon.com Inc. or its affiliates. */
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
> index b39e87e967cd..18532d564f79 100644
> --- a/tools/testing/selftests/net/so_netns_cookie.c
> +++ b/tools/testing/selftests/net/so_netns_cookie.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
> index 8457b7ccbc09..011a24af9786 100644
> --- a/tools/testing/selftests/net/so_txtime.c
> +++ b/tools/testing/selftests/net/so_txtime.c
> @@ -9,9 +9,6 @@
>   * the expected stream. Sender will read transmit timestamps from the error
>   * queue. The streams can differ due to out-of-order delivery and drops.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
> index 247c3b3ac1c9..fa78b92d9740 100644
> --- a/tools/testing/selftests/net/tap.c
> +++ b/tools/testing/selftests/net/tap.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> index c1cb0c75156a..d30f89bb944c 100644
> --- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> +++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> @@ -12,7 +12,6 @@
>   * there are no cases in which a cookie is not accepted by verifying
>   * that TcpExtTCPFastOpenPassiveFail remains 0.
>   */
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
> index bd6a9c7a3e8a..71ee145f151e 100644
> --- a/tools/testing/selftests/net/tcp_inq.c
> +++ b/tools/testing/selftests/net/tcp_inq.c
> @@ -5,8 +5,6 @@
>   *
>   * Simple example on how to use TCP_INQ and TCP_CM_INQ.
>   */
> -#define _GNU_SOURCE
> -
>  #include <error.h>
>  #include <netinet/in.h>
>  #include <netinet/tcp.h>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index 4fcce5150850..72d5f1207ee0 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -46,7 +46,6 @@
>   * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
>   *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
>   */
> -#define _GNU_SOURCE
>  #include <pthread.h>
>  #include <sys/types.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
> index f27a12d2a2c9..6dbad97d1d0a 100644
> --- a/tools/testing/selftests/net/tls.c
> +++ b/tools/testing/selftests/net/tls.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
> index 9ba03164d73a..e2d739892ce4 100644
> --- a/tools/testing/selftests/net/toeplitz.c
> +++ b/tools/testing/selftests/net/toeplitz.c
> @@ -20,9 +20,6 @@
>   * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
>   * 6. Compare the cpus from 4 and 5
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
> index fa83918b62d1..a64dcfb242c1 100644
> --- a/tools/testing/selftests/net/tun.c
> +++ b/tools/testing/selftests/net/tun.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
> index 7d9ea039450a..96972e0110a0 100644
> --- a/tools/testing/selftests/net/txring_overwrite.c
> +++ b/tools/testing/selftests/net/txring_overwrite.c
> @@ -4,9 +4,6 @@
>   * Verify that consecutive sends over packet tx_ring are mirrored
>   * with their original content intact.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <assert.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
> index ec60a16c9307..33dba9e90dea 100644
> --- a/tools/testing/selftests/net/txtimestamp.c
> +++ b/tools/testing/selftests/net/txtimestamp.c
> @@ -16,9 +16,6 @@
>   * This test requires a dummy TCP server.
>   * A simple `nc6 [-u] -l -p $DESTPORT` will do
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/types.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
> index 85b3baa3f7f3..9dc1026a033a 100644
> --- a/tools/testing/selftests/net/udpgso.c
> +++ b/tools/testing/selftests/net/udpgso.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <stddef.h>
>  #include <arpa/inet.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 1cbadd267c96..999df1236320 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
> index 477392715a9a..d7632993b354 100644
> --- a/tools/testing/selftests/net/udpgso_bench_tx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_tx.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
> index 5814611a1dc7..ef4d923f4759 100644
> --- a/tools/testing/selftests/perf_events/remove_on_exec.c
> +++ b/tools/testing/selftests/perf_events/remove_on_exec.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2021, Google LLC.
>   */
>  
> -#define _GNU_SOURCE
> -
>  /* We need the latest siginfo from the kernel repo. */
>  #include <sys/types.h>
>  #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
> index d1d8483ac628..14d1a3c8cb5c 100644
> --- a/tools/testing/selftests/perf_events/sigtrap_threads.c
> +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2021, Google LLC.
>   */
>  
> -#define _GNU_SOURCE
> -
>  /* We need the latest siginfo from the kernel repo. */
>  #include <sys/types.h>
>  #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
> index 7d84097ad45c..54dc8f16d92a 100644
> --- a/tools/testing/selftests/pid_namespace/regression_enomem.c
> +++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
> index 88d6830ee004..e33177b1aa41 100644
> --- a/tools/testing/selftests/pidfd/pidfd.h
> +++ b/tools/testing/selftests/pidfd/pidfd.h
> @@ -3,7 +3,6 @@
>  #ifndef __PIDFD_H
>  #define __PIDFD_H
>  
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 01cc37bf611c..67c9dc436c71 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> index cd51d547b751..b6a0e9b3d2f5 100644
> --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..781a3931fb5a 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..a40fb27a78bb 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <poll.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> index 6e2f2cd400ca..49d7a78cc4fe 100644
> --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index c081ae91313a..c3d52406b8fd 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
> index 0dcb8365ddc3..54beba0983f1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_wait.c
> +++ b/tools/testing/selftests/pidfd/pidfd_wait.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/sched.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
> index 5297b10d25c3..054a78ebe8b5 100644
> --- a/tools/testing/selftests/ptrace/get_set_sud.c
> +++ b/tools/testing/selftests/ptrace/get_set_sud.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include "../kselftest_harness.h"
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
> index a6884f66dc01..1b7b77190f72 100644
> --- a/tools/testing/selftests/ptrace/peeksiginfo.c
> +++ b/tools/testing/selftests/ptrace/peeksiginfo.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <signal.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> index 2348d2c20d0a..5961c24ee1ae 100644
> --- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> +++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <pthread.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
> index 295eea16466f..1fed749b4bd7 100644
> --- a/tools/testing/selftests/rseq/basic_test.c
> +++ b/tools/testing/selftests/rseq/basic_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Basic test coverage for critical regions and rseq_current_cpu().
>   */
> -
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <sched.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
> index 2f37961240ca..48a55d94eb72 100644
> --- a/tools/testing/selftests/rseq/param_test.c
> +++ b/tools/testing/selftests/rseq/param_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <linux/membarrier.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
> index 96e812bdf8a4..88602889414c 100644
> --- a/tools/testing/selftests/rseq/rseq.c
> +++ b/tools/testing/selftests/rseq/rseq.c
> @@ -14,8 +14,6 @@
>   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>   * Lesser General Public License for more details.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <sched.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> index b83099160fbc..3632a4890da9 100644
> --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
> +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> @@ -2,7 +2,6 @@
>   * Strictly speaking, this is not a test. But it can report during test
>   * runs so relative performace can be measured.
>   */
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <err.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 783ebce8c4de..972ccc12553e 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -4,8 +4,6 @@
>   *
>   * Test code for seccomp bpf.
>   */
> -
> -#define _GNU_SOURCE
>  #include <sys/types.h>
>  
>  /*
> diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
> index 7288a05136ba..a1f156dbbd56 100644
> --- a/tools/testing/selftests/user_events/abi_test.c
> +++ b/tools/testing/selftests/user_events/abi_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
> index d884fd69dd51..9441635fc452 100644
> --- a/tools/testing/selftests/x86/amx.c
> +++ b/tools/testing/selftests/x86/amx.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <errno.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
> index 3bc95f3ed585..0129cdae8abe 100644
> --- a/tools/testing/selftests/x86/check_initial_reg_state.c
> +++ b/tools/testing/selftests/x86/check_initial_reg_state.c
> @@ -3,9 +3,6 @@
>   * check_initial_reg_state.c - check that execve sets the correct state
>   * Copyright (c) 2014-2016 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  
>  unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
> diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
> index cf9ce8fbb656..d2c746149678 100644
> --- a/tools/testing/selftests/x86/corrupt_xstate_header.c
> +++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
> @@ -4,9 +4,6 @@
>   *
>   * Based on analysis and a test case from Thomas Gleixner.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
> index d1e919b0c1dc..9fa9d4a847ac 100644
> --- a/tools/testing/selftests/x86/entry_from_vm86.c
> +++ b/tools/testing/selftests/x86/entry_from_vm86.c
> @@ -5,9 +5,6 @@
>   *
>   * This exercises a few paths that need to special-case vm86 mode.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <stdlib.h>
>  #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
> index 8c780cce941d..348134d2cefc 100644
> --- a/tools/testing/selftests/x86/fsgsbase.c
> +++ b/tools/testing/selftests/x86/fsgsbase.c
> @@ -3,8 +3,6 @@
>   * fsgsbase.c, an fsgsbase test
>   * Copyright (c) 2014-2016 Andy Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
> index 6fffadc51579..88dce47ab8e6 100644
> --- a/tools/testing/selftests/x86/fsgsbase_restore.c
> +++ b/tools/testing/selftests/x86/fsgsbase_restore.c
> @@ -12,8 +12,6 @@
>   *
>   * This is not part of fsgsbase.c, because that test is 64-bit only.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
> index 57ec5e99edb9..07b7c10f8d39 100644
> --- a/tools/testing/selftests/x86/ioperm.c
> +++ b/tools/testing/selftests/x86/ioperm.c
> @@ -3,8 +3,6 @@
>   * ioperm.c - Test case for ioperm(2)
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
> index 7e3e09c1abac..baa691154905 100644
> --- a/tools/testing/selftests/x86/iopl.c
> +++ b/tools/testing/selftests/x86/iopl.c
> @@ -3,8 +3,6 @@
>   * iopl.c - Test case for a Linux on Xen 64-bit bug
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
> index 215b8150b7cc..39edfd7f6037 100644
> --- a/tools/testing/selftests/x86/lam.c
> +++ b/tools/testing/selftests/x86/lam.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
> index 3a29346e1452..3b4237a85a12 100644
> --- a/tools/testing/selftests/x86/ldt_gdt.c
> +++ b/tools/testing/selftests/x86/ldt_gdt.c
> @@ -3,8 +3,6 @@
>   * ldt_gdt.c - Test cases for LDT and GDT access
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
> index cc3de6ff9fba..47ecc63220b7 100644
> --- a/tools/testing/selftests/x86/mov_ss_trap.c
> +++ b/tools/testing/selftests/x86/mov_ss_trap.c
> @@ -19,8 +19,6 @@
>   *
>   * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
>   */
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <sys/ptrace.h>
>  #include <sys/types.h>
> diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
> index ea4a4e246879..97c5b34096cc 100644
> --- a/tools/testing/selftests/x86/nx_stack.c
> +++ b/tools/testing/selftests/x86/nx_stack.c
> @@ -23,8 +23,6 @@
>   * Regular stack is completely overwritten before testing.
>   * Test doesn't exit SIGSEGV handler after first fault at INT3.
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE
>  #undef NDEBUG
>  #include <assert.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
> index 12aaa063196e..bdc81c8bd1a7 100644
> --- a/tools/testing/selftests/x86/ptrace_syscall.c
> +++ b/tools/testing/selftests/x86/ptrace_syscall.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <sys/ptrace.h>
>  #include <sys/types.h>
>  #include <sys/wait.h>
> diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
> index f689af75e979..7f41c3a4268b 100644
> --- a/tools/testing/selftests/x86/sigaltstack.c
> +++ b/tools/testing/selftests/x86/sigaltstack.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -
> -#define _GNU_SOURCE
>  #include <signal.h>
>  #include <stdio.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
> index 5d7961a5f7f6..2054f729b2c2 100644
> --- a/tools/testing/selftests/x86/sigreturn.c
> +++ b/tools/testing/selftests/x86/sigreturn.c
> @@ -24,9 +24,6 @@
>   *
>   * Do not run on outdated, unpatched kernels at risk of nasty crashes.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/time.h>
>  #include <time.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
> index 9a30f443e928..375f3b50a0b5 100644
> --- a/tools/testing/selftests/x86/single_step_syscall.c
> +++ b/tools/testing/selftests/x86/single_step_syscall.c
> @@ -9,9 +9,6 @@
>   * immediately issues #DB from CPL 0.  This requires special handling in
>   * the kernel.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/time.h>
>  #include <time.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
> index 461fa41a4d02..10eee1bcd015 100644
> --- a/tools/testing/selftests/x86/syscall_arg_fault.c
> +++ b/tools/testing/selftests/x86/syscall_arg_fault.c
> @@ -3,9 +3,6 @@
>   * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
> index 991591718bb0..c72fc8aaa4d3 100644
> --- a/tools/testing/selftests/x86/syscall_numbering.c
> +++ b/tools/testing/selftests/x86/syscall_numbering.c
> @@ -5,9 +5,6 @@
>   *
>   * Copyright (c) 2018 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
> index 84d74be1d902..24bc219358a5 100644
> --- a/tools/testing/selftests/x86/sysret_rip.c
> +++ b/tools/testing/selftests/x86/sysret_rip.c
> @@ -3,9 +3,6 @@
>   * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
>   * Copyright (c) 2014-2016 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
> index 5f3d4fca440f..f8b9e0b2a0c5 100644
> --- a/tools/testing/selftests/x86/sysret_ss_attrs.c
> +++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
> @@ -7,9 +7,6 @@
>   * the hidden attributes set to an unusable state.  Make sure the kernel
>   * doesn't let this happen.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
> index 6b5036fbb735..0c9431ba7d31 100644
> --- a/tools/testing/selftests/x86/test_FCMOV.c
> +++ b/tools/testing/selftests/x86/test_FCMOV.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
> index aec6692c6dcf..ba186665918d 100644
> --- a/tools/testing/selftests/x86/test_FCOMI.c
> +++ b/tools/testing/selftests/x86/test_FCOMI.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
> index 09789c0ce3e9..95580cdaaa32 100644
> --- a/tools/testing/selftests/x86/test_FISTTP.c
> +++ b/tools/testing/selftests/x86/test_FISTTP.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
> index f0d876d48277..a8bdba356682 100644
> --- a/tools/testing/selftests/x86/test_mremap_vdso.c
> +++ b/tools/testing/selftests/x86/test_mremap_vdso.c
> @@ -9,7 +9,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_mremap_vdso.c
>   */
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <errno.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 757e6527f67e..0ceca9064cec 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -7,9 +7,6 @@
>   * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
>   * stick to the basics and hope the compiler doesn't do anything strange.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/syscall.h>
>  #include <asm/mman.h>
>  #include <sys/mman.h>
> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
> index 47cab972807c..cbf4e5012005 100644
> --- a/tools/testing/selftests/x86/test_vsyscall.c
> +++ b/tools/testing/selftests/x86/test_vsyscall.c
> @@ -1,7 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <sys/time.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
> index 4c311e1af4c7..754f5d4d425a 100644
> --- a/tools/testing/selftests/x86/unwind_vdso.c
> +++ b/tools/testing/selftests/x86/unwind_vdso.c
> @@ -5,9 +5,6 @@
>   *
>   * This tests __kernel_vsyscall's unwind info.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <features.h>
>  #include <stdio.h>
>  
> diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
> index fe99f2434155..8193de22a390 100644
> --- a/tools/testing/selftests/x86/vdso_restorer.c
> +++ b/tools/testing/selftests/x86/vdso_restorer.c
> @@ -10,9 +10,6 @@
>   * 64-bit userspace has never supported sa_restorer == NULL, so this is
>   * 32-bit only.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <err.h>
>  #include <stdio.h>
>  #include <dlfcn.h>

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>  tools/testing/selftests/capabilities/test_execve.c            | 2 --
>  tools/testing/selftests/clone3/clone3.c                       | 2 --
>  .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>  tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>  tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>  tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>  tools/testing/selftests/core/close_range_test.c               | 2 --
>  tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>  tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>  tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>  tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>  tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>  tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>  tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>  tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>  tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>  .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>  tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>  tools/testing/selftests/ipc/msgque.c                          | 1 -
>  tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>  tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>  tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>  tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>  tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>  tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>  tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>  tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>  tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>  tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>  tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>  tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>  tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>  tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>  tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>  tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>  tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>  tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>  tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>  tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>  tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>  .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>  tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>  tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>  tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>  tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>  tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>  tools/testing/selftests/kvm/steal_time.c                      | 1 -
>  tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>  .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>  tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>  tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>  tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>  tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>  tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>  tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>  tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>  tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>  .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>  tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>  tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>  .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>  tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>  tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>  tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>  tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>  tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>  tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>  tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>  .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>  tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>  tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>  tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>  tools/testing/selftests/landlock/base_test.c                  | 2 --
>  tools/testing/selftests/landlock/fs_test.c                    | 2 --
>  tools/testing/selftests/landlock/net_test.c                   | 2 --
>  tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>  tools/testing/selftests/lsm/common.c                          | 2 --
>  tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>  tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>  tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>  tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>  .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>  .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>  tools/testing/selftests/memfd/common.c                        | 1 -
>  tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>  tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>  tools/testing/selftests/mm/cow.c                              | 1 -
>  tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>  tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>  tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>  tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>  tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>  tools/testing/selftests/mm/khugepaged.c                       | 1 -
>  tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>  tools/testing/selftests/mm/madv_populate.c                    | 1 -
>  tools/testing/selftests/mm/map_populate.c                     | 2 --
>  tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>  tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>  tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>  tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>  tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>  tools/testing/selftests/mm/mremap_test.c                      | 2 --
>  tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>  tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>  tools/testing/selftests/mm/protection_keys.c                  | 1 -
>  tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>  tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>  tools/testing/selftests/mm/uffd-common.h                      | 1 -
>  tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>  .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>  tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>  tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>  tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>  tools/testing/selftests/net/csum.c                            | 3 ---
>  tools/testing/selftests/net/gro.c                             | 3 ---
>  tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>  tools/testing/selftests/net/ipsec.c                           | 3 ---
>  tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>  tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>  tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>  tools/testing/selftests/net/nettest.c                         | 2 --
>  tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>  tools/testing/selftests/net/psock_snd.c                       | 3 ---
>  tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>  tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>  tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>  tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>  tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>  tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>  tools/testing/selftests/net/so_txtime.c                       | 3 ---
>  tools/testing/selftests/net/tap.c                             | 3 ---
>  tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>  tools/testing/selftests/net/tcp_inq.c                         | 2 --
>  tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>  tools/testing/selftests/net/tls.c                             | 3 ---
>  tools/testing/selftests/net/toeplitz.c                        | 3 ---
>  tools/testing/selftests/net/tun.c                             | 3 ---
>  tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>  tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>  tools/testing/selftests/net/udpgso.c                          | 3 ---
>  tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>  tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>  tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>  tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>  tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>  tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>  tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>  tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>  tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>  tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>  tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>  tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>  tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>  tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>  tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>  tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>  tools/testing/selftests/rseq/basic_test.c                     | 2 --
>  tools/testing/selftests/rseq/param_test.c                     | 1 -
>  tools/testing/selftests/rseq/rseq.c                           | 2 --
>  tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>  tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>  tools/testing/selftests/user_events/abi_test.c                | 2 --
>  tools/testing/selftests/x86/amx.c                             | 2 --
>  tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>  tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>  tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>  tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>  tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>  tools/testing/selftests/x86/ioperm.c                          | 2 --
>  tools/testing/selftests/x86/iopl.c                            | 2 --
>  tools/testing/selftests/x86/lam.c                             | 1 -
>  tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>  tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>  tools/testing/selftests/x86/nx_stack.c                        | 2 --
>  tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>  tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>  tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>  tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>  tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>  tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>  tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>  tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>  tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>  tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>  tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>  tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>  tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>  tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>  tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>  tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>  tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>  198 files changed, 405 deletions(-)
> 
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index b171fd53b004..c1a6ce7b0912 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdbool.h>
>  #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
> index 7cde07a5df78..e3954b88c3ee 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <cap-ng.h>
>  #include <linux/capability.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 3c9bf0cd82a8..3c5e45dae617 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -1,8 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  
>  /* Based on Christian Brauner's clone3() example */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <inttypes.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> index 31b56d625655..bb99ea20f7d5 100644
> --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> @@ -7,8 +7,6 @@
>   */
>  
>  /* capabilities related code based on selftests/bpf/test_verifier.c */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <linux/sched.h>
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 54a8b2445be9..50336d56db6b 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <sched.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
> index 3d2663fe50ba..172e19d5515f 100644
> --- a/tools/testing/selftests/clone3/clone3_selftests.h
> +++ b/tools/testing/selftests/clone3/clone3_selftests.h
> @@ -3,7 +3,6 @@
>  #ifndef _CLONE3_SELFTESTS_H
>  #define _CLONE3_SELFTESTS_H
>  
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <linux/sched.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index ed785afb6077..8b5ed4484ee6 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -5,8 +5,6 @@
>   * These tests are assuming to be running in the host's
>   * PID namespace.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <linux/sched.h>
> diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
> index c59e4adb905d..1c2902bcc913 100644
> --- a/tools/testing/selftests/core/close_range_test.c
> +++ b/tools/testing/selftests/core/close_range_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> index c812080e304e..7c8dbab8ac44 100644
> --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> +++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> index e0319417124d..6b411859c2cd 100644
> --- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <sys/stat.h>
>  #include <sys/types.h>
> diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> index 5f362c0fd890..fca693db1b09 100644
> --- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
> index b1fc9b916ace..73766447eeb0 100644
> --- a/tools/testing/selftests/filesystems/devpts_pts.c
> +++ b/tools/testing/selftests/filesystems/devpts_pts.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
> index c0a9b2d3302d..05367a70b963 100644
> --- a/tools/testing/selftests/filesystems/dnotify_test.c
> +++ b/tools/testing/selftests/filesystems/dnotify_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE	/* needed to get the defines */
>  #include <fcntl.h>	/* in glibc 2.2 this has the needed
>  				   values defined */
>  #include <signal.h>
> diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> index 65ede506305c..9bc2ddad7e92 100644
> --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <asm/unistd.h>
>  #include <linux/time_types.h>
>  #include <poll.h>
> diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> index f142a137526c..17935f42fbc9 100644
> --- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> +++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <asm/unistd.h>
> diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> index e488ad354fce..56cf3ad8640d 100644
> --- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
> +++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> @@ -6,8 +6,6 @@
>   * Copyright 2022 Red Hat Inc.
>   * Author: Javier Martinez Canillas <javierm@redhat.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> index 759f86e7d263..b58a80bde95a 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> +++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <inttypes.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> index 3eafd7da58e2..d1cefd1b7d16 100644
> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <stdint.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> index 7f3ca5c78df1..8e41f9fe784c 100644
> --- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> +++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> @@ -16,9 +16,6 @@
>   *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
>   *
>   *****************************************************************************/
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <limits.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..291c81d59a9d 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 25110c7c0b3e..885c9e943cee 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> index 4eaba83cdcf3..5369959e9fc2 100644
> --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
> +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright (c) 2021, Google LLC.
>   */
> -#define _GNU_SOURCE
> -
>  #include "arch_timer.h"
>  #include "delay.h"
>  #include "gic.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> index 5972905275cf..79e99f47a9fe 100644
> --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> @@ -7,7 +7,6 @@
>   * hugetlbfs with a hole). It checks that the expected handling method is
>   * called (e.g., uffd faults with the right address and write/read flag).
>   */
> -#define _GNU_SOURCE
>  #include <linux/bitmap.h>
>  #include <fcntl.h>
>  #include <test_util.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> index 9b004905d1d3..1c8c6f0c1ca3 100644
> --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> @@ -10,9 +10,6 @@
>   *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
>   *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <linux/psci.h>
>  
>  #include "kvm_util.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index ca917c71ff60..b3b5fb0ff0a9 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE
>  #include <linux/kernel.h>
>  #include <sys/syscall.h>
>  #include <asm/kvm.h>
> diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
> index ae1f1a6d8312..fcebd8d81ce4 100644
> --- a/tools/testing/selftests/kvm/arch_timer.c
> +++ b/tools/testing/selftests/kvm/arch_timer.c
> @@ -19,9 +19,6 @@
>   *
>   * Copyright (c) 2021, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <pthread.h>
>  #include <linux/sizes.h>
> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
> index bf3609f71854..0c4d3b6afbf8 100644
> --- a/tools/testing/selftests/kvm/demand_paging_test.c
> +++ b/tools/testing/selftests/kvm/demand_paging_test.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019, Google, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
> index eaad5b20854c..bf1ebc29f22a 100644
> --- a/tools/testing/selftests/kvm/dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/dirty_log_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Red Hat, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index 92eae206baa6..309fe84b84ad 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Author: Chao Peng <chao.p.peng@linux.intel.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
> index decc521fc760..bce73bcb973c 100644
> --- a/tools/testing/selftests/kvm/hardware_disable_test.c
> +++ b/tools/testing/selftests/kvm/hardware_disable_test.c
> @@ -4,9 +4,6 @@
>   * kvm_arch_hardware_disable is called and it attempts to unregister the user
>   * return notifiers.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <fcntl.h>
>  #include <pthread.h>
>  #include <semaphore.h>
> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> index 877449c34592..a9d97c213584 100644
> --- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -5,9 +5,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019-2022 Google LLC
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <time.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> index 698c1cfa3111..f02355c3c4c2 100644
> --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> @@ -6,8 +6,6 @@
>   *
>   * Test the fd-based interface for KVM statistics.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> index b9e23265e4b3..c78f34699f73 100644
> --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> @@ -6,8 +6,6 @@
>   *
>   * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
> index e0ba97ac1c56..7759c685086b 100644
> --- a/tools/testing/selftests/kvm/kvm_page_table_test.c
> +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
> @@ -8,9 +8,6 @@
>   * page size have been pre-allocated on your system, if you are planning to
>   * use hugepages to back the guest memory for testing.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
> index 2bd25b191d15..b49690658c60 100644
> --- a/tools/testing/selftests/kvm/lib/assert.c
> +++ b/tools/testing/selftests/kvm/lib/assert.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
> -
>  #include "test_util.h"
>  
>  #include <execinfo.h>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index b2262b5fad9e..1eaf001d0ad4 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (C) 2018, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
>  #include "test_util.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
> index cf2c73971308..555e3932e529 100644
> --- a/tools/testing/selftests/kvm/lib/memstress.c
> +++ b/tools/testing/selftests/kvm/lib/memstress.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2020, Google LLC.
>   */
> -#define _GNU_SOURCE
> -
>  #include <inttypes.h>
>  #include <linux/bitmap.h>
>  
> diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
> index 5a8f8becb129..8ed0b74ae837 100644
> --- a/tools/testing/selftests/kvm/lib/test_util.c
> +++ b/tools/testing/selftests/kvm/lib/test_util.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (C) 2020, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdarg.h>
>  #include <assert.h>
> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> index f4eef6eb2dc2..bd07568a5240 100644
> --- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019-2022 Google LLC
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> index e248d3364b9c..e83809febae1 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <stdint.h>
>  #include <stdbool.h>
>  
> diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
> index 1a6da7389bf1..0b9678858b6d 100644
> --- a/tools/testing/selftests/kvm/max_guest_memory_test.c
> +++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> index 156361966612..05fcf902e067 100644
> --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2020, Google, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..4b5004ef9c6b 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -7,9 +7,6 @@
>   *
>   * Copyright (c) 2024, Intel Corporation.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include "arch_timer.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
> index 28f97fb52044..b3536400f9ac 100644
> --- a/tools/testing/selftests/kvm/rseq_test.c
> +++ b/tools/testing/selftests/kvm/rseq_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
> index 626a2b8a2037..84ba79c42ab1 100644
> --- a/tools/testing/selftests/kvm/s390x/cmma_test.c
> +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
> @@ -7,8 +7,6 @@
>   * Authors:
>   *  Nico Boehr <nrb@linux.ibm.com>
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> index 43fb25ddc3ec..53def355ccba 100644
> --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> @@ -10,8 +10,6 @@
>   *
>   * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index bd57d991e27d..214ff84f6fdb 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <pthread.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
> index bae0c5026f82..e9231387c589 100644
> --- a/tools/testing/selftests/kvm/steal_time.c
> +++ b/tools/testing/selftests/kvm/steal_time.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <time.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
> index eae521f050e0..8e5713e36d4b 100644
> --- a/tools/testing/selftests/kvm/x86_64/amx_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
> @@ -6,8 +6,6 @@
>   *
>   * Tests for amx #NM exception and save/restore.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> index 6c2e5e0ceb1f..9c21b6bccc38 100644
> --- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "flds_emulation.h"
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> index df351ae17029..10b1b0ba374e 100644
> --- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2023, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> index 5c27efbf405e..4f5881d4ef66 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> @@ -7,8 +7,6 @@
>   * This work is licensed under the terms of the GNU GPL, version 2.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> index 4c7257ecd2a6..4f3f3a9b038b 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for Enlightened VMCS, including nested guest state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> index f1617762c22f..8206f5ef42dd 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2022, Red Hat, Inc.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <pthread.h>
>  #include <inttypes.h>
>  
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> index c9b18707edc0..b987a3d79715 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for Hyper-V extensions to SVM.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> index 05b56095cf76..077cd0ec3040 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2022, Red Hat, Inc.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <asm/barrier.h>
>  #include <pthread.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> index 3670331adf21..3eb0313ffa39 100644
> --- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "test_util.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> index 17bbb96fc4df..e7efb2b35f8b 100644
> --- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> @@ -5,9 +5,6 @@
>   *
>   * Copyright (C) 2022, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <fcntl.h>
>  #include <stdint.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> index 87011965dc41..2165b1ad8b38 100644
> --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> @@ -9,8 +9,6 @@
>   * Verifies expected behavior of controlling guest access to
>   * MSR_PLATFORM_INFO.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 26c85815f7e9..77f14138594e 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2023, Tencent, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <x86intrin.h>
>  
>  #include "pmu.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index 3c85d1ae9893..5ce53b8c46e0 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -9,9 +9,6 @@
>   * Verifies the expected behavior of allow lists and deny lists for
>   * virtual PMU events.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "kvm_util.h"
>  #include "pmu.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> index e0f642d2a3c4..82a8d88b5338 100644
> --- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> @@ -2,7 +2,6 @@
>  /*
>   * Copyright (C) 2022, Google LLC.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <limits.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> index 366cf18600bc..d691d86e5bc3 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE /* for program_invocation_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> index 3610981d9162..c021c0795a96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> @@ -10,7 +10,6 @@
>   * That bug allowed a user-mode program that called the KVM_SET_SREGS
>   * ioctl to put a VCPU's local APIC into an invalid state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> index 416207c38a17..362be40fc00d 100644
> --- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> @@ -5,9 +5,6 @@
>   * Test that KVM emulates instructions in response to EPT violations when
>   * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "flds_emulation.h"
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
> index e18b86666e1f..55c88d664a94 100644
> --- a/tools/testing/selftests/kvm/x86_64/smm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for SMM.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
> index 88b58aab7207..1c756db329e5 100644
> --- a/tools/testing/selftests/kvm/x86_64/state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/state_test.c
> @@ -6,7 +6,6 @@
>   *
>   * Tests for vCPU state save/restore, including nested guest state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> index adb5593daf48..8fa3948b0170 100644
> --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> @@ -8,8 +8,6 @@
>   * including requesting an invalid register set, updates to/from values
>   * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> index dcbb3c29fb8e..abe71946941f 100644
> --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> @@ -17,8 +17,6 @@
>   * delivered into the guest or not.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <pthread.h>
>  #include <inttypes.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> index f4f61a2d2464..53afbea4df88 100644
> --- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Tests for exiting into userspace on registered MSRs
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "kvm_test_harness.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> index 977948fd52e6..fa512d033205 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Red Hat, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> index ea0cb3cae0f7..3b93f262b797 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> @@ -10,7 +10,6 @@
>   * and check it can be retrieved with KVM_GET_MSR, also test
>   * the invalid LBR formats are rejected.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> index affc32800158..00dd2ac07a61 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> @@ -9,7 +9,6 @@
>   * value instead of partially decayed timer value
>   *
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> index 725c206ba0b9..c78e5f755116 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> @@ -19,8 +19,6 @@
>   * Migration is a command line option. When used on non-numa machines will 
>   * exit with error. Test is still usefull on non-numa for testing IPIs.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <getopt.h>
>  #include <pthread.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> index ab75b873a4ad..69849acd95b0 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> index 167c97abff1b..f331a4e9bae3 100644
> --- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Tests for the IA32_XSS MSR.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index a6f89aaea77d..bdb3955a9452 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>   * Copyright © 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 9a6036fbf289..acec1c82c8b4 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>   * Copyright © 2020 ANSSI
>   * Copyright © 2020-2022 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <linux/landlock.h>
>  #include <linux/magic.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
>   * Copyright © 2023 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>   * Copyright © 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
> index 9ad258912646..1b18aac570f1 100644
> --- a/tools/testing/selftests/lsm/common.c
> +++ b/tools/testing/selftests/lsm/common.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright © 2023 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> index df215e4aa63f..7465bde3f922 100644
> --- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> index 06d24d4679a6..a6b44e25c21f 100644
> --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
> +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <string.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> index 66dec47e3ca3..110c6a07e74c 100644
> --- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <string.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> index af89855adb7b..a8a60b6271a5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
> +++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> @@ -1,5 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index a9cc17facfb3..b4651e2ade00 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index 4cdc8b1d124c..17ae5199b916 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
> index 8eb3d75f6e60..879d4f4c66fa 100644
> --- a/tools/testing/selftests/memfd/common.c
> +++ b/tools/testing/selftests/memfd/common.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
> index 93798c8c5d54..15bc189bf831 100644
> --- a/tools/testing/selftests/memfd/fuse_test.c
> +++ b/tools/testing/selftests/memfd/fuse_test.c
> @@ -12,8 +12,6 @@
>   * the read() syscall with our memory-mapped memfd object as receive buffer to
>   * force the kernel to write into our memfd object.
>   */
> -
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index 18f585684e20..5172c27a8748 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 363bf5f801be..6f1a36d51f19 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
> index ad168d35b23b..3bfd5a630081 100644
> --- a/tools/testing/selftests/mm/gup_longterm.c
> +++ b/tools/testing/selftests/mm/gup_longterm.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
> index 267eea2e0e0b..edb46888222f 100644
> --- a/tools/testing/selftests/mm/hugepage-mmap.c
> +++ b/tools/testing/selftests/mm/hugepage-mmap.c
> @@ -16,7 +16,6 @@
>   * range.
>   * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
> index c463d1c09c9b..8e22822bb754 100644
> --- a/tools/testing/selftests/mm/hugepage-mremap.c
> +++ b/tools/testing/selftests/mm/hugepage-mremap.c
> @@ -11,8 +11,6 @@
>   * To make sure the test triggers pmd sharing and goes through the 'unshare'
>   * path in the mremap code use 1GB (1024) or more.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index e74107185324..70c40c67bc5d 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -11,8 +11,6 @@
>   * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
>   * directory.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> index ba6cc6f9cabc..6b8b41b4f754 100644
> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
> index 829320a519e7..d18bf400dae6 100644
> --- a/tools/testing/selftests/mm/khugepaged.c
> +++ b/tools/testing/selftests/mm/khugepaged.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>  #include <ctype.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
> index d615767e396b..1deae905c42e 100644
> --- a/tools/testing/selftests/mm/ksm_functional_tests.c
> +++ b/tools/testing/selftests/mm/ksm_functional_tests.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
> index 17bcb07f19f3..d19ad13ffd7e 100644
> --- a/tools/testing/selftests/mm/madv_populate.c
> +++ b/tools/testing/selftests/mm/madv_populate.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
> index 5c8a53869b1b..ff4d4079bd0e 100644
> --- a/tools/testing/selftests/mm/map_populate.c
> +++ b/tools/testing/selftests/mm/map_populate.c
> @@ -4,8 +4,6 @@
>   *
>   * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sys/mman.h>
> diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
> index 1e01d3ddc11c..200bedcdc32e 100644
> --- a/tools/testing/selftests/mm/mdwe_test.c
> +++ b/tools/testing/selftests/mm/mdwe_test.c
> @@ -7,7 +7,6 @@
>  #include <linux/mman.h>
>  #include <linux/prctl.h>
>  
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <sys/auxv.h>
> diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
> index 9b298f6a04b3..750adede2816 100644
> --- a/tools/testing/selftests/mm/memfd_secret.c
> +++ b/tools/testing/selftests/mm/memfd_secret.c
> @@ -4,8 +4,6 @@
>   *
>   * Author: Mike Rapoport <rppt@linux.ibm.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <sys/uio.h>
>  #include <sys/mman.h>
>  #include <sys/wait.h>
> diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
> index 26f744188ad0..42574290d728 100644
> --- a/tools/testing/selftests/mm/mlock2-tests.c
> +++ b/tools/testing/selftests/mm/mlock2-tests.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sys/mman.h>
>  #include <stdint.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
> index 100370a7111d..d78bf686e99f 100644
> --- a/tools/testing/selftests/mm/mrelease_test.c
> +++ b/tools/testing/selftests/mm/mrelease_test.c
> @@ -2,7 +2,6 @@
>  /*
>   * Copyright 2022 Google LLC
>   */
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <stdbool.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
> index 1d75084b9ca5..934fa6b441b2 100644
> --- a/tools/testing/selftests/mm/mremap_dontunmap.c
> +++ b/tools/testing/selftests/mm/mremap_dontunmap.c
> @@ -5,7 +5,6 @@
>   *
>   * Copyright 2020, Brian Geffon <bgeffon@google.com>
>   */
> -#define _GNU_SOURCE
>  #include <sys/mman.h>
>  #include <linux/mman.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
> index 2f8b991f78cb..e057154630e0 100644
> --- a/tools/testing/selftests/mm/mremap_test.c
> +++ b/tools/testing/selftests/mm/mremap_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright 2020 Google LLC
>   */
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
> index d59517ed3d48..2a18b5d276f0 100644
> --- a/tools/testing/selftests/mm/pagemap_ioctl.c
> +++ b/tools/testing/selftests/mm/pagemap_ioctl.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 1af3156a9db8..37d6b01ce90a 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -1,7 +1,6 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
>  #ifndef _PKEYS_HELPER_H
>  #define _PKEYS_HELPER_H
> -#define _GNU_SOURCE
>  #include <string.h>
>  #include <stdarg.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
> index 48dc151f8fca..9f7de92caeda 100644
> --- a/tools/testing/selftests/mm/protection_keys.c
> +++ b/tools/testing/selftests/mm/protection_keys.c
> @@ -21,7 +21,6 @@
>   *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>   *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>   */
> -#define _GNU_SOURCE
>  #define __SANE_USERSPACE_TYPES__
>  #include <errno.h>
>  #include <linux/elf.h>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index d3c7f5fb3e7b..ae6ac950d7a1 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -3,8 +3,6 @@
>   * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
>   * address range in a process via <debugfs>/split_huge_pages interface.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdarg.h>
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index ea7fd8fe2876..28a5c31bd791 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -12,8 +12,6 @@
>     ipcrm -m by hand, like this
>     sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
>     (warning this will remove all if someone else uses them) */
> -
> -#define _GNU_SOURCE 1
>  #include <sys/mman.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
> index cc5629c3d2aa..abb44319264a 100644
> --- a/tools/testing/selftests/mm/uffd-common.h
> +++ b/tools/testing/selftests/mm/uffd-common.h
> @@ -7,7 +7,6 @@
>  #ifndef __UFFD_COMMON_H__
>  #define __UFFD_COMMON_H__
>  
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <errno.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index c6a8c732b802..d894417134b6 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <stdio.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> index bcf51d785a37..bd975670f61d 100644
> --- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> +++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <stdio.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
> index 79a3dd75590e..279d0c5f70d3 100644
> --- a/tools/testing/selftests/net/af_unix/diag_uid.c
> +++ b/tools/testing/selftests/net/af_unix/diag_uid.c
> @@ -1,7 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright Amazon.com Inc. or its affiliates. */
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> index 7e534594167e..2986b8cd0418 100644
> --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
> +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0 OR MIT
> -#define _GNU_SOURCE
>  #include <error.h>
>  #include <limits.h>
>  #include <stddef.h>
> diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
> index d799fd8f5c7c..34e816862cc7 100644
> --- a/tools/testing/selftests/net/af_unix/unix_connect.c
> +++ b/tools/testing/selftests/net/af_unix/unix_connect.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <stddef.h>
> diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
> index 90eb06fefa59..8262aa862331 100644
> --- a/tools/testing/selftests/net/csum.c
> +++ b/tools/testing/selftests/net/csum.c
> @@ -58,9 +58,6 @@
>   * different seed for each run (and logs this for reproducibility). It
>   * is advised to enable this for extra coverage in continuous testing.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/byteorder.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
> index 353e1e867fbb..f5d7032e6466 100644
> --- a/tools/testing/selftests/net/gro.c
> +++ b/tools/testing/selftests/net/gro.c
> @@ -34,9 +34,6 @@
>   * flakiness is to be expected.
>   *
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
> index f9ed749fd8c7..80c9e567a3d8 100644
> --- a/tools/testing/selftests/net/ip_defrag.c
> +++ b/tools/testing/selftests/net/ip_defrag.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
> index be4a30a0d02a..04aa06d26b09 100644
> --- a/tools/testing/selftests/net/ipsec.c
> +++ b/tools/testing/selftests/net/ipsec.c
> @@ -3,9 +3,6 @@
>   * ipsec.c - Check xfrm on veth inside a net-ns.
>   * Copyright (c) 2018 Dmitry Safonov
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/types.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
> index 708a9822259d..b7e0c3c02e20 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel.c
> @@ -1,8 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Test IPV6_FLOWINFO cmsg on send and recv */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/byteorder.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> index af95b48acea9..ebd219ba386e 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> @@ -1,8 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Test IPV6_FLOWINFO_MGR */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index d2043ec3bf6d..ea93030ed3ec 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <limits.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> index 218aac467321..c5bf873d76c2 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> index 926b0be87c99..7203ca9900e9 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
> index bdc03a2097e8..9278bf585c80 100644
> --- a/tools/testing/selftests/net/msg_zerocopy.c
> +++ b/tools/testing/selftests/net/msg_zerocopy.c
> @@ -24,9 +24,6 @@
>   * the kernel queues completions on the error queue for all zerocopy
>   * transfers.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
> index cd8a58097448..88e1d3b2ddf1 100644
> --- a/tools/testing/selftests/net/nettest.c
> +++ b/tools/testing/selftests/net/nettest.c
> @@ -3,8 +3,6 @@
>   *
>   * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
>   */
> -
> -#define _GNU_SOURCE
>  #include <features.h>
>  #include <sys/types.h>
>  #include <sys/ioctl.h>
> diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
> index 1a736f700be4..5b2d34440ae9 100644
> --- a/tools/testing/selftests/net/psock_fanout.c
> +++ b/tools/testing/selftests/net/psock_fanout.c
> @@ -26,9 +26,6 @@
>   * Todo:
>   * - functionality: PACKET_FANOUT_FLAG_DEFRAG
>   */
> -
> -#define _GNU_SOURCE		/* for sched_setaffinity */
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
> index edf1e6f80d41..2f29b513e18f 100644
> --- a/tools/testing/selftests/net/psock_snd.c
> +++ b/tools/testing/selftests/net/psock_snd.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
> index b8475cb29be7..9ee6ece52865 100644
> --- a/tools/testing/selftests/net/reuseport_addr_any.c
> +++ b/tools/testing/selftests/net/reuseport_addr_any.c
> @@ -3,9 +3,6 @@
>  /* Test that sockets listening on a specific address are preferred
>   * over sockets listening on addr_any.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> index 2d646174729f..e93e38cfb2a8 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> @@ -11,9 +11,6 @@
>   * This entire process is done for several different core id permutations
>   * and for each IPv4/IPv6 and TCP/UDP combination.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
> index c9ba36aa688e..502fdb9ce770 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_numa.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
> @@ -3,9 +3,6 @@
>   * Test functionality of BPF filters with SO_REUSEPORT. Same test as
>   * in reuseport_bpf_cpu, only as one socket per NUMA node.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
> index fb7a59ed759e..d3c3d3f39f8f 100644
> --- a/tools/testing/selftests/net/reuseport_dualstack.c
> +++ b/tools/testing/selftests/net/reuseport_dualstack.c
> @@ -10,9 +10,6 @@
>   * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
>   * AF_INET preference for v4 packets.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
> index e9fa14e10732..95bd0cdc3253 100644
> --- a/tools/testing/selftests/net/so_incoming_cpu.c
> +++ b/tools/testing/selftests/net/so_incoming_cpu.c
> @@ -1,6 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright Amazon.com Inc. or its affiliates. */
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
> index b39e87e967cd..18532d564f79 100644
> --- a/tools/testing/selftests/net/so_netns_cookie.c
> +++ b/tools/testing/selftests/net/so_netns_cookie.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
> index 8457b7ccbc09..011a24af9786 100644
> --- a/tools/testing/selftests/net/so_txtime.c
> +++ b/tools/testing/selftests/net/so_txtime.c
> @@ -9,9 +9,6 @@
>   * the expected stream. Sender will read transmit timestamps from the error
>   * queue. The streams can differ due to out-of-order delivery and drops.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
> index 247c3b3ac1c9..fa78b92d9740 100644
> --- a/tools/testing/selftests/net/tap.c
> +++ b/tools/testing/selftests/net/tap.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> index c1cb0c75156a..d30f89bb944c 100644
> --- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> +++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> @@ -12,7 +12,6 @@
>   * there are no cases in which a cookie is not accepted by verifying
>   * that TcpExtTCPFastOpenPassiveFail remains 0.
>   */
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
> index bd6a9c7a3e8a..71ee145f151e 100644
> --- a/tools/testing/selftests/net/tcp_inq.c
> +++ b/tools/testing/selftests/net/tcp_inq.c
> @@ -5,8 +5,6 @@
>   *
>   * Simple example on how to use TCP_INQ and TCP_CM_INQ.
>   */
> -#define _GNU_SOURCE
> -
>  #include <error.h>
>  #include <netinet/in.h>
>  #include <netinet/tcp.h>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index 4fcce5150850..72d5f1207ee0 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -46,7 +46,6 @@
>   * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
>   *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
>   */
> -#define _GNU_SOURCE
>  #include <pthread.h>
>  #include <sys/types.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
> index f27a12d2a2c9..6dbad97d1d0a 100644
> --- a/tools/testing/selftests/net/tls.c
> +++ b/tools/testing/selftests/net/tls.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
> index 9ba03164d73a..e2d739892ce4 100644
> --- a/tools/testing/selftests/net/toeplitz.c
> +++ b/tools/testing/selftests/net/toeplitz.c
> @@ -20,9 +20,6 @@
>   * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
>   * 6. Compare the cpus from 4 and 5
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
> index fa83918b62d1..a64dcfb242c1 100644
> --- a/tools/testing/selftests/net/tun.c
> +++ b/tools/testing/selftests/net/tun.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
> index 7d9ea039450a..96972e0110a0 100644
> --- a/tools/testing/selftests/net/txring_overwrite.c
> +++ b/tools/testing/selftests/net/txring_overwrite.c
> @@ -4,9 +4,6 @@
>   * Verify that consecutive sends over packet tx_ring are mirrored
>   * with their original content intact.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <assert.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
> index ec60a16c9307..33dba9e90dea 100644
> --- a/tools/testing/selftests/net/txtimestamp.c
> +++ b/tools/testing/selftests/net/txtimestamp.c
> @@ -16,9 +16,6 @@
>   * This test requires a dummy TCP server.
>   * A simple `nc6 [-u] -l -p $DESTPORT` will do
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/types.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
> index 85b3baa3f7f3..9dc1026a033a 100644
> --- a/tools/testing/selftests/net/udpgso.c
> +++ b/tools/testing/selftests/net/udpgso.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <stddef.h>
>  #include <arpa/inet.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 1cbadd267c96..999df1236320 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
> index 477392715a9a..d7632993b354 100644
> --- a/tools/testing/selftests/net/udpgso_bench_tx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_tx.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
> index 5814611a1dc7..ef4d923f4759 100644
> --- a/tools/testing/selftests/perf_events/remove_on_exec.c
> +++ b/tools/testing/selftests/perf_events/remove_on_exec.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2021, Google LLC.
>   */
>  
> -#define _GNU_SOURCE
> -
>  /* We need the latest siginfo from the kernel repo. */
>  #include <sys/types.h>
>  #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
> index d1d8483ac628..14d1a3c8cb5c 100644
> --- a/tools/testing/selftests/perf_events/sigtrap_threads.c
> +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2021, Google LLC.
>   */
>  
> -#define _GNU_SOURCE
> -
>  /* We need the latest siginfo from the kernel repo. */
>  #include <sys/types.h>
>  #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
> index 7d84097ad45c..54dc8f16d92a 100644
> --- a/tools/testing/selftests/pid_namespace/regression_enomem.c
> +++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
> index 88d6830ee004..e33177b1aa41 100644
> --- a/tools/testing/selftests/pidfd/pidfd.h
> +++ b/tools/testing/selftests/pidfd/pidfd.h
> @@ -3,7 +3,6 @@
>  #ifndef __PIDFD_H
>  #define __PIDFD_H
>  
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 01cc37bf611c..67c9dc436c71 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> index cd51d547b751..b6a0e9b3d2f5 100644
> --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..781a3931fb5a 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..a40fb27a78bb 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <poll.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> index 6e2f2cd400ca..49d7a78cc4fe 100644
> --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index c081ae91313a..c3d52406b8fd 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
> index 0dcb8365ddc3..54beba0983f1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_wait.c
> +++ b/tools/testing/selftests/pidfd/pidfd_wait.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/sched.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
> index 5297b10d25c3..054a78ebe8b5 100644
> --- a/tools/testing/selftests/ptrace/get_set_sud.c
> +++ b/tools/testing/selftests/ptrace/get_set_sud.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include "../kselftest_harness.h"
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
> index a6884f66dc01..1b7b77190f72 100644
> --- a/tools/testing/selftests/ptrace/peeksiginfo.c
> +++ b/tools/testing/selftests/ptrace/peeksiginfo.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <signal.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> index 2348d2c20d0a..5961c24ee1ae 100644
> --- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> +++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <pthread.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
> index 295eea16466f..1fed749b4bd7 100644
> --- a/tools/testing/selftests/rseq/basic_test.c
> +++ b/tools/testing/selftests/rseq/basic_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Basic test coverage for critical regions and rseq_current_cpu().
>   */
> -
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <sched.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
> index 2f37961240ca..48a55d94eb72 100644
> --- a/tools/testing/selftests/rseq/param_test.c
> +++ b/tools/testing/selftests/rseq/param_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <linux/membarrier.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
> index 96e812bdf8a4..88602889414c 100644
> --- a/tools/testing/selftests/rseq/rseq.c
> +++ b/tools/testing/selftests/rseq/rseq.c
> @@ -14,8 +14,6 @@
>   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>   * Lesser General Public License for more details.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <sched.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> index b83099160fbc..3632a4890da9 100644
> --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
> +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> @@ -2,7 +2,6 @@
>   * Strictly speaking, this is not a test. But it can report during test
>   * runs so relative performace can be measured.
>   */
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <err.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 783ebce8c4de..972ccc12553e 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -4,8 +4,6 @@
>   *
>   * Test code for seccomp bpf.
>   */
> -
> -#define _GNU_SOURCE
>  #include <sys/types.h>
>  
>  /*
> diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
> index 7288a05136ba..a1f156dbbd56 100644
> --- a/tools/testing/selftests/user_events/abi_test.c
> +++ b/tools/testing/selftests/user_events/abi_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
> index d884fd69dd51..9441635fc452 100644
> --- a/tools/testing/selftests/x86/amx.c
> +++ b/tools/testing/selftests/x86/amx.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <errno.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
> index 3bc95f3ed585..0129cdae8abe 100644
> --- a/tools/testing/selftests/x86/check_initial_reg_state.c
> +++ b/tools/testing/selftests/x86/check_initial_reg_state.c
> @@ -3,9 +3,6 @@
>   * check_initial_reg_state.c - check that execve sets the correct state
>   * Copyright (c) 2014-2016 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  
>  unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
> diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
> index cf9ce8fbb656..d2c746149678 100644
> --- a/tools/testing/selftests/x86/corrupt_xstate_header.c
> +++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
> @@ -4,9 +4,6 @@
>   *
>   * Based on analysis and a test case from Thomas Gleixner.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
> index d1e919b0c1dc..9fa9d4a847ac 100644
> --- a/tools/testing/selftests/x86/entry_from_vm86.c
> +++ b/tools/testing/selftests/x86/entry_from_vm86.c
> @@ -5,9 +5,6 @@
>   *
>   * This exercises a few paths that need to special-case vm86 mode.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <stdlib.h>
>  #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
> index 8c780cce941d..348134d2cefc 100644
> --- a/tools/testing/selftests/x86/fsgsbase.c
> +++ b/tools/testing/selftests/x86/fsgsbase.c
> @@ -3,8 +3,6 @@
>   * fsgsbase.c, an fsgsbase test
>   * Copyright (c) 2014-2016 Andy Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
> index 6fffadc51579..88dce47ab8e6 100644
> --- a/tools/testing/selftests/x86/fsgsbase_restore.c
> +++ b/tools/testing/selftests/x86/fsgsbase_restore.c
> @@ -12,8 +12,6 @@
>   *
>   * This is not part of fsgsbase.c, because that test is 64-bit only.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
> index 57ec5e99edb9..07b7c10f8d39 100644
> --- a/tools/testing/selftests/x86/ioperm.c
> +++ b/tools/testing/selftests/x86/ioperm.c
> @@ -3,8 +3,6 @@
>   * ioperm.c - Test case for ioperm(2)
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
> index 7e3e09c1abac..baa691154905 100644
> --- a/tools/testing/selftests/x86/iopl.c
> +++ b/tools/testing/selftests/x86/iopl.c
> @@ -3,8 +3,6 @@
>   * iopl.c - Test case for a Linux on Xen 64-bit bug
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
> index 215b8150b7cc..39edfd7f6037 100644
> --- a/tools/testing/selftests/x86/lam.c
> +++ b/tools/testing/selftests/x86/lam.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
> index 3a29346e1452..3b4237a85a12 100644
> --- a/tools/testing/selftests/x86/ldt_gdt.c
> +++ b/tools/testing/selftests/x86/ldt_gdt.c
> @@ -3,8 +3,6 @@
>   * ldt_gdt.c - Test cases for LDT and GDT access
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
> index cc3de6ff9fba..47ecc63220b7 100644
> --- a/tools/testing/selftests/x86/mov_ss_trap.c
> +++ b/tools/testing/selftests/x86/mov_ss_trap.c
> @@ -19,8 +19,6 @@
>   *
>   * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
>   */
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <sys/ptrace.h>
>  #include <sys/types.h>
> diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
> index ea4a4e246879..97c5b34096cc 100644
> --- a/tools/testing/selftests/x86/nx_stack.c
> +++ b/tools/testing/selftests/x86/nx_stack.c
> @@ -23,8 +23,6 @@
>   * Regular stack is completely overwritten before testing.
>   * Test doesn't exit SIGSEGV handler after first fault at INT3.
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE
>  #undef NDEBUG
>  #include <assert.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
> index 12aaa063196e..bdc81c8bd1a7 100644
> --- a/tools/testing/selftests/x86/ptrace_syscall.c
> +++ b/tools/testing/selftests/x86/ptrace_syscall.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <sys/ptrace.h>
>  #include <sys/types.h>
>  #include <sys/wait.h>
> diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
> index f689af75e979..7f41c3a4268b 100644
> --- a/tools/testing/selftests/x86/sigaltstack.c
> +++ b/tools/testing/selftests/x86/sigaltstack.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -
> -#define _GNU_SOURCE
>  #include <signal.h>
>  #include <stdio.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
> index 5d7961a5f7f6..2054f729b2c2 100644
> --- a/tools/testing/selftests/x86/sigreturn.c
> +++ b/tools/testing/selftests/x86/sigreturn.c
> @@ -24,9 +24,6 @@
>   *
>   * Do not run on outdated, unpatched kernels at risk of nasty crashes.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/time.h>
>  #include <time.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
> index 9a30f443e928..375f3b50a0b5 100644
> --- a/tools/testing/selftests/x86/single_step_syscall.c
> +++ b/tools/testing/selftests/x86/single_step_syscall.c
> @@ -9,9 +9,6 @@
>   * immediately issues #DB from CPL 0.  This requires special handling in
>   * the kernel.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/time.h>
>  #include <time.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
> index 461fa41a4d02..10eee1bcd015 100644
> --- a/tools/testing/selftests/x86/syscall_arg_fault.c
> +++ b/tools/testing/selftests/x86/syscall_arg_fault.c
> @@ -3,9 +3,6 @@
>   * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
> index 991591718bb0..c72fc8aaa4d3 100644
> --- a/tools/testing/selftests/x86/syscall_numbering.c
> +++ b/tools/testing/selftests/x86/syscall_numbering.c
> @@ -5,9 +5,6 @@
>   *
>   * Copyright (c) 2018 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
> index 84d74be1d902..24bc219358a5 100644
> --- a/tools/testing/selftests/x86/sysret_rip.c
> +++ b/tools/testing/selftests/x86/sysret_rip.c
> @@ -3,9 +3,6 @@
>   * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
>   * Copyright (c) 2014-2016 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
> index 5f3d4fca440f..f8b9e0b2a0c5 100644
> --- a/tools/testing/selftests/x86/sysret_ss_attrs.c
> +++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
> @@ -7,9 +7,6 @@
>   * the hidden attributes set to an unusable state.  Make sure the kernel
>   * doesn't let this happen.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
> index 6b5036fbb735..0c9431ba7d31 100644
> --- a/tools/testing/selftests/x86/test_FCMOV.c
> +++ b/tools/testing/selftests/x86/test_FCMOV.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
> index aec6692c6dcf..ba186665918d 100644
> --- a/tools/testing/selftests/x86/test_FCOMI.c
> +++ b/tools/testing/selftests/x86/test_FCOMI.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
> index 09789c0ce3e9..95580cdaaa32 100644
> --- a/tools/testing/selftests/x86/test_FISTTP.c
> +++ b/tools/testing/selftests/x86/test_FISTTP.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
> index f0d876d48277..a8bdba356682 100644
> --- a/tools/testing/selftests/x86/test_mremap_vdso.c
> +++ b/tools/testing/selftests/x86/test_mremap_vdso.c
> @@ -9,7 +9,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_mremap_vdso.c
>   */
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <errno.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 757e6527f67e..0ceca9064cec 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -7,9 +7,6 @@
>   * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
>   * stick to the basics and hope the compiler doesn't do anything strange.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/syscall.h>
>  #include <asm/mman.h>
>  #include <sys/mman.h>
> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
> index 47cab972807c..cbf4e5012005 100644
> --- a/tools/testing/selftests/x86/test_vsyscall.c
> +++ b/tools/testing/selftests/x86/test_vsyscall.c
> @@ -1,7 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <sys/time.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
> index 4c311e1af4c7..754f5d4d425a 100644
> --- a/tools/testing/selftests/x86/unwind_vdso.c
> +++ b/tools/testing/selftests/x86/unwind_vdso.c
> @@ -5,9 +5,6 @@
>   *
>   * This tests __kernel_vsyscall's unwind info.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <features.h>
>  #include <stdio.h>
>  
> diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
> index fe99f2434155..8193de22a390 100644
> --- a/tools/testing/selftests/x86/vdso_restorer.c
> +++ b/tools/testing/selftests/x86/vdso_restorer.c
> @@ -10,9 +10,6 @@
>   * 64-bit userspace has never supported sa_restorer == NULL, so this is
>   * 32-bit only.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <err.h>
>  #include <stdio.h>
>  #include <dlfcn.h>

-- 
BR,
Muhammad Usama Anjum

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linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>  tools/testing/selftests/capabilities/test_execve.c            | 2 --
>  tools/testing/selftests/clone3/clone3.c                       | 2 --
>  .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>  tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>  tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>  tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>  tools/testing/selftests/core/close_range_test.c               | 2 --
>  tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>  tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>  tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>  tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>  tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>  tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>  tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>  tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>  tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>  .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>  tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>  tools/testing/selftests/ipc/msgque.c                          | 1 -
>  tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>  tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>  tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>  tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>  tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>  tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>  tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>  tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>  tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>  tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>  tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>  tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>  tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>  tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>  tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>  tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>  tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>  tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>  tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>  tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>  tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>  .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>  tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>  tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>  tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>  tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>  tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>  tools/testing/selftests/kvm/steal_time.c                      | 1 -
>  tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>  .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>  tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>  tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>  tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>  tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>  tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>  tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>  tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>  tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>  tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>  .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>  tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>  tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>  .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>  tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>  tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>  tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>  tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>  tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>  tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>  tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>  .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>  tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>  tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>  tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>  tools/testing/selftests/landlock/base_test.c                  | 2 --
>  tools/testing/selftests/landlock/fs_test.c                    | 2 --
>  tools/testing/selftests/landlock/net_test.c                   | 2 --
>  tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>  tools/testing/selftests/lsm/common.c                          | 2 --
>  tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>  tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>  tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>  tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>  .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>  .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>  tools/testing/selftests/memfd/common.c                        | 1 -
>  tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>  tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>  tools/testing/selftests/mm/cow.c                              | 1 -
>  tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>  tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>  tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>  tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>  tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>  tools/testing/selftests/mm/khugepaged.c                       | 1 -
>  tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>  tools/testing/selftests/mm/madv_populate.c                    | 1 -
>  tools/testing/selftests/mm/map_populate.c                     | 2 --
>  tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>  tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>  tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>  tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>  tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>  tools/testing/selftests/mm/mremap_test.c                      | 2 --
>  tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>  tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>  tools/testing/selftests/mm/protection_keys.c                  | 1 -
>  tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>  tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>  tools/testing/selftests/mm/uffd-common.h                      | 1 -
>  tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>  .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>  tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>  tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>  tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>  tools/testing/selftests/net/csum.c                            | 3 ---
>  tools/testing/selftests/net/gro.c                             | 3 ---
>  tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>  tools/testing/selftests/net/ipsec.c                           | 3 ---
>  tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>  tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>  tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>  tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>  tools/testing/selftests/net/nettest.c                         | 2 --
>  tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>  tools/testing/selftests/net/psock_snd.c                       | 3 ---
>  tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>  tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>  tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>  tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>  tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>  tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>  tools/testing/selftests/net/so_txtime.c                       | 3 ---
>  tools/testing/selftests/net/tap.c                             | 3 ---
>  tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>  tools/testing/selftests/net/tcp_inq.c                         | 2 --
>  tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>  tools/testing/selftests/net/tls.c                             | 3 ---
>  tools/testing/selftests/net/toeplitz.c                        | 3 ---
>  tools/testing/selftests/net/tun.c                             | 3 ---
>  tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>  tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>  tools/testing/selftests/net/udpgso.c                          | 3 ---
>  tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>  tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>  tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>  tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>  tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>  tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>  tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>  tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>  tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>  tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>  tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>  tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>  tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>  tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>  tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>  tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>  tools/testing/selftests/rseq/basic_test.c                     | 2 --
>  tools/testing/selftests/rseq/param_test.c                     | 1 -
>  tools/testing/selftests/rseq/rseq.c                           | 2 --
>  tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>  tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>  tools/testing/selftests/user_events/abi_test.c                | 2 --
>  tools/testing/selftests/x86/amx.c                             | 2 --
>  tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>  tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>  tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>  tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>  tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>  tools/testing/selftests/x86/ioperm.c                          | 2 --
>  tools/testing/selftests/x86/iopl.c                            | 2 --
>  tools/testing/selftests/x86/lam.c                             | 1 -
>  tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>  tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>  tools/testing/selftests/x86/nx_stack.c                        | 2 --
>  tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>  tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>  tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>  tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>  tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>  tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>  tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>  tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>  tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>  tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>  tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>  tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>  tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>  tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>  tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>  tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>  tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>  198 files changed, 405 deletions(-)
> 
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index b171fd53b004..c1a6ce7b0912 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdbool.h>
>  #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
> index 7cde07a5df78..e3954b88c3ee 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <cap-ng.h>
>  #include <linux/capability.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 3c9bf0cd82a8..3c5e45dae617 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -1,8 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  
>  /* Based on Christian Brauner's clone3() example */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <inttypes.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> index 31b56d625655..bb99ea20f7d5 100644
> --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> @@ -7,8 +7,6 @@
>   */
>  
>  /* capabilities related code based on selftests/bpf/test_verifier.c */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <linux/sched.h>
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 54a8b2445be9..50336d56db6b 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <sched.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
> index 3d2663fe50ba..172e19d5515f 100644
> --- a/tools/testing/selftests/clone3/clone3_selftests.h
> +++ b/tools/testing/selftests/clone3/clone3_selftests.h
> @@ -3,7 +3,6 @@
>  #ifndef _CLONE3_SELFTESTS_H
>  #define _CLONE3_SELFTESTS_H
>  
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <linux/sched.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index ed785afb6077..8b5ed4484ee6 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -5,8 +5,6 @@
>   * These tests are assuming to be running in the host's
>   * PID namespace.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <linux/sched.h>
> diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
> index c59e4adb905d..1c2902bcc913 100644
> --- a/tools/testing/selftests/core/close_range_test.c
> +++ b/tools/testing/selftests/core/close_range_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> index c812080e304e..7c8dbab8ac44 100644
> --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> +++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> index e0319417124d..6b411859c2cd 100644
> --- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <sys/stat.h>
>  #include <sys/types.h>
> diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> index 5f362c0fd890..fca693db1b09 100644
> --- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
> index b1fc9b916ace..73766447eeb0 100644
> --- a/tools/testing/selftests/filesystems/devpts_pts.c
> +++ b/tools/testing/selftests/filesystems/devpts_pts.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
> index c0a9b2d3302d..05367a70b963 100644
> --- a/tools/testing/selftests/filesystems/dnotify_test.c
> +++ b/tools/testing/selftests/filesystems/dnotify_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE	/* needed to get the defines */
>  #include <fcntl.h>	/* in glibc 2.2 this has the needed
>  				   values defined */
>  #include <signal.h>
> diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> index 65ede506305c..9bc2ddad7e92 100644
> --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <asm/unistd.h>
>  #include <linux/time_types.h>
>  #include <poll.h>
> diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> index f142a137526c..17935f42fbc9 100644
> --- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> +++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <asm/unistd.h>
> diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> index e488ad354fce..56cf3ad8640d 100644
> --- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
> +++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> @@ -6,8 +6,6 @@
>   * Copyright 2022 Red Hat Inc.
>   * Author: Javier Martinez Canillas <javierm@redhat.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> index 759f86e7d263..b58a80bde95a 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> +++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <inttypes.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> index 3eafd7da58e2..d1cefd1b7d16 100644
> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <stdint.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> index 7f3ca5c78df1..8e41f9fe784c 100644
> --- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> +++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> @@ -16,9 +16,6 @@
>   *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
>   *
>   *****************************************************************************/
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <limits.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..291c81d59a9d 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 25110c7c0b3e..885c9e943cee 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> index 4eaba83cdcf3..5369959e9fc2 100644
> --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
> +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright (c) 2021, Google LLC.
>   */
> -#define _GNU_SOURCE
> -
>  #include "arch_timer.h"
>  #include "delay.h"
>  #include "gic.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> index 5972905275cf..79e99f47a9fe 100644
> --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> @@ -7,7 +7,6 @@
>   * hugetlbfs with a hole). It checks that the expected handling method is
>   * called (e.g., uffd faults with the right address and write/read flag).
>   */
> -#define _GNU_SOURCE
>  #include <linux/bitmap.h>
>  #include <fcntl.h>
>  #include <test_util.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> index 9b004905d1d3..1c8c6f0c1ca3 100644
> --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> @@ -10,9 +10,6 @@
>   *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
>   *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <linux/psci.h>
>  
>  #include "kvm_util.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index ca917c71ff60..b3b5fb0ff0a9 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE
>  #include <linux/kernel.h>
>  #include <sys/syscall.h>
>  #include <asm/kvm.h>
> diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
> index ae1f1a6d8312..fcebd8d81ce4 100644
> --- a/tools/testing/selftests/kvm/arch_timer.c
> +++ b/tools/testing/selftests/kvm/arch_timer.c
> @@ -19,9 +19,6 @@
>   *
>   * Copyright (c) 2021, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <pthread.h>
>  #include <linux/sizes.h>
> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
> index bf3609f71854..0c4d3b6afbf8 100644
> --- a/tools/testing/selftests/kvm/demand_paging_test.c
> +++ b/tools/testing/selftests/kvm/demand_paging_test.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019, Google, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
> index eaad5b20854c..bf1ebc29f22a 100644
> --- a/tools/testing/selftests/kvm/dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/dirty_log_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Red Hat, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index 92eae206baa6..309fe84b84ad 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Author: Chao Peng <chao.p.peng@linux.intel.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
> index decc521fc760..bce73bcb973c 100644
> --- a/tools/testing/selftests/kvm/hardware_disable_test.c
> +++ b/tools/testing/selftests/kvm/hardware_disable_test.c
> @@ -4,9 +4,6 @@
>   * kvm_arch_hardware_disable is called and it attempts to unregister the user
>   * return notifiers.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <fcntl.h>
>  #include <pthread.h>
>  #include <semaphore.h>
> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> index 877449c34592..a9d97c213584 100644
> --- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -5,9 +5,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019-2022 Google LLC
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <time.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> index 698c1cfa3111..f02355c3c4c2 100644
> --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> @@ -6,8 +6,6 @@
>   *
>   * Test the fd-based interface for KVM statistics.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> index b9e23265e4b3..c78f34699f73 100644
> --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> @@ -6,8 +6,6 @@
>   *
>   * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
> index e0ba97ac1c56..7759c685086b 100644
> --- a/tools/testing/selftests/kvm/kvm_page_table_test.c
> +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
> @@ -8,9 +8,6 @@
>   * page size have been pre-allocated on your system, if you are planning to
>   * use hugepages to back the guest memory for testing.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
> index 2bd25b191d15..b49690658c60 100644
> --- a/tools/testing/selftests/kvm/lib/assert.c
> +++ b/tools/testing/selftests/kvm/lib/assert.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
> -
>  #include "test_util.h"
>  
>  #include <execinfo.h>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index b2262b5fad9e..1eaf001d0ad4 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (C) 2018, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
>  #include "test_util.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
> index cf2c73971308..555e3932e529 100644
> --- a/tools/testing/selftests/kvm/lib/memstress.c
> +++ b/tools/testing/selftests/kvm/lib/memstress.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2020, Google LLC.
>   */
> -#define _GNU_SOURCE
> -
>  #include <inttypes.h>
>  #include <linux/bitmap.h>
>  
> diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
> index 5a8f8becb129..8ed0b74ae837 100644
> --- a/tools/testing/selftests/kvm/lib/test_util.c
> +++ b/tools/testing/selftests/kvm/lib/test_util.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (C) 2020, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdarg.h>
>  #include <assert.h>
> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> index f4eef6eb2dc2..bd07568a5240 100644
> --- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2019-2022 Google LLC
>   */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> index e248d3364b9c..e83809febae1 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <stdint.h>
>  #include <stdbool.h>
>  
> diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
> index 1a6da7389bf1..0b9678858b6d 100644
> --- a/tools/testing/selftests/kvm/max_guest_memory_test.c
> +++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> index 156361966612..05fcf902e067 100644
> --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> @@ -6,9 +6,6 @@
>   * Copyright (C) 2018, Red Hat, Inc.
>   * Copyright (C) 2020, Google, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..4b5004ef9c6b 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -7,9 +7,6 @@
>   *
>   * Copyright (c) 2024, Intel Corporation.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include "arch_timer.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
> index 28f97fb52044..b3536400f9ac 100644
> --- a/tools/testing/selftests/kvm/rseq_test.c
> +++ b/tools/testing/selftests/kvm/rseq_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
> index 626a2b8a2037..84ba79c42ab1 100644
> --- a/tools/testing/selftests/kvm/s390x/cmma_test.c
> +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
> @@ -7,8 +7,6 @@
>   * Authors:
>   *  Nico Boehr <nrb@linux.ibm.com>
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> index 43fb25ddc3ec..53def355ccba 100644
> --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> @@ -10,8 +10,6 @@
>   *
>   * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index bd57d991e27d..214ff84f6fdb 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <pthread.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
> index bae0c5026f82..e9231387c589 100644
> --- a/tools/testing/selftests/kvm/steal_time.c
> +++ b/tools/testing/selftests/kvm/steal_time.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <time.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
> index eae521f050e0..8e5713e36d4b 100644
> --- a/tools/testing/selftests/kvm/x86_64/amx_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
> @@ -6,8 +6,6 @@
>   *
>   * Tests for amx #NM exception and save/restore.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> index 6c2e5e0ceb1f..9c21b6bccc38 100644
> --- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "flds_emulation.h"
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> index df351ae17029..10b1b0ba374e 100644
> --- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2023, Google LLC.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> index 5c27efbf405e..4f5881d4ef66 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> @@ -7,8 +7,6 @@
>   * This work is licensed under the terms of the GNU GPL, version 2.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> index 4c7257ecd2a6..4f3f3a9b038b 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for Enlightened VMCS, including nested guest state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> index f1617762c22f..8206f5ef42dd 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2022, Red Hat, Inc.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <pthread.h>
>  #include <inttypes.h>
>  
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> index c9b18707edc0..b987a3d79715 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for Hyper-V extensions to SVM.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> index 05b56095cf76..077cd0ec3040 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2022, Red Hat, Inc.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <asm/barrier.h>
>  #include <pthread.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> index 3670331adf21..3eb0313ffa39 100644
> --- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "test_util.h"
>  #include "kvm_util.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> index 17bbb96fc4df..e7efb2b35f8b 100644
> --- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> @@ -5,9 +5,6 @@
>   *
>   * Copyright (C) 2022, Google LLC.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <fcntl.h>
>  #include <stdint.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> index 87011965dc41..2165b1ad8b38 100644
> --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> @@ -9,8 +9,6 @@
>   * Verifies expected behavior of controlling guest access to
>   * MSR_PLATFORM_INFO.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 26c85815f7e9..77f14138594e 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright (C) 2023, Tencent, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <x86intrin.h>
>  
>  #include "pmu.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index 3c85d1ae9893..5ce53b8c46e0 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -9,9 +9,6 @@
>   * Verifies the expected behavior of allow lists and deny lists for
>   * virtual PMU events.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "kvm_util.h"
>  #include "pmu.h"
>  #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> index e0f642d2a3c4..82a8d88b5338 100644
> --- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> @@ -2,7 +2,6 @@
>  /*
>   * Copyright (C) 2022, Google LLC.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <limits.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> index 366cf18600bc..d691d86e5bc3 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> @@ -4,7 +4,6 @@
>   *
>   * Copyright (C) 2020, Red Hat, Inc.
>   */
> -#define _GNU_SOURCE /* for program_invocation_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> index 3610981d9162..c021c0795a96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> @@ -10,7 +10,6 @@
>   * That bug allowed a user-mode program that called the KVM_SET_SREGS
>   * ioctl to put a VCPU's local APIC into an invalid state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> index 416207c38a17..362be40fc00d 100644
> --- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> @@ -5,9 +5,6 @@
>   * Test that KVM emulates instructions in response to EPT violations when
>   * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>  #include "flds_emulation.h"
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
> index e18b86666e1f..55c88d664a94 100644
> --- a/tools/testing/selftests/kvm/x86_64/smm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
> @@ -4,7 +4,6 @@
>   *
>   * Tests for SMM.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
> index 88b58aab7207..1c756db329e5 100644
> --- a/tools/testing/selftests/kvm/x86_64/state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/state_test.c
> @@ -6,7 +6,6 @@
>   *
>   * Tests for vCPU state save/restore, including nested guest state.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> index adb5593daf48..8fa3948b0170 100644
> --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> @@ -8,8 +8,6 @@
>   * including requesting an invalid register set, updates to/from values
>   * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> index dcbb3c29fb8e..abe71946941f 100644
> --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> @@ -17,8 +17,6 @@
>   * delivered into the guest or not.
>   *
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <pthread.h>
>  #include <inttypes.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> index f4f61a2d2464..53afbea4df88 100644
> --- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Tests for exiting into userspace on registered MSRs
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "kvm_test_harness.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> index 977948fd52e6..fa512d033205 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> @@ -4,9 +4,6 @@
>   *
>   * Copyright (C) 2018, Red Hat, Inc.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> index ea0cb3cae0f7..3b93f262b797 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> @@ -10,7 +10,6 @@
>   * and check it can be retrieved with KVM_GET_MSR, also test
>   * the invalid LBR formats are rejected.
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> index affc32800158..00dd2ac07a61 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> @@ -9,7 +9,6 @@
>   * value instead of partially decayed timer value
>   *
>   */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> index 725c206ba0b9..c78e5f755116 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> @@ -19,8 +19,6 @@
>   * Migration is a command line option. When used on non-numa machines will 
>   * exit with error. Test is still usefull on non-numa for testing IPIs.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <getopt.h>
>  #include <pthread.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> index ab75b873a4ad..69849acd95b0 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <fcntl.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> index 167c97abff1b..f331a4e9bae3 100644
> --- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Tests for the IA32_XSS MSR.
>   */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>  #include <sys/ioctl.h>
>  
>  #include "test_util.h"
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index a6f89aaea77d..bdb3955a9452 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>   * Copyright ? 2017-2020 Micka?l Sala?n <mic@digikod.net>
>   * Copyright ? 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 9a6036fbf289..acec1c82c8b4 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>   * Copyright ? 2020 ANSSI
>   * Copyright ? 2020-2022 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <fcntl.h>
>  #include <linux/landlock.h>
>  #include <linux/magic.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>   * Copyright ? 2022-2023 Huawei Tech. Co., Ltd.
>   * Copyright ? 2023 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>   * Copyright ? 2017-2020 Micka?l Sala?n <mic@digikod.net>
>   * Copyright ? 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
> index 9ad258912646..1b18aac570f1 100644
> --- a/tools/testing/selftests/lsm/common.c
> +++ b/tools/testing/selftests/lsm/common.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright ? 2023 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> index df215e4aa63f..7465bde3f922 100644
> --- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> index 06d24d4679a6..a6b44e25c21f 100644
> --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
> +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <string.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> index 66dec47e3ca3..110c6a07e74c 100644
> --- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> @@ -5,8 +5,6 @@
>   *
>   * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <linux/lsm.h>
>  #include <string.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> index af89855adb7b..a8a60b6271a5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
> +++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> @@ -1,5 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index a9cc17facfb3..b4651e2ade00 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index 4cdc8b1d124c..17ae5199b916 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <linux/membarrier.h>
>  #include <syscall.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
> index 8eb3d75f6e60..879d4f4c66fa 100644
> --- a/tools/testing/selftests/memfd/common.c
> +++ b/tools/testing/selftests/memfd/common.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
> index 93798c8c5d54..15bc189bf831 100644
> --- a/tools/testing/selftests/memfd/fuse_test.c
> +++ b/tools/testing/selftests/memfd/fuse_test.c
> @@ -12,8 +12,6 @@
>   * the read() syscall with our memory-mapped memfd object as receive buffer to
>   * force the kernel to write into our memfd object.
>   */
> -
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index 18f585684e20..5172c27a8748 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #define __EXPORTED_HEADERS__
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 363bf5f801be..6f1a36d51f19 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
> index ad168d35b23b..3bfd5a630081 100644
> --- a/tools/testing/selftests/mm/gup_longterm.c
> +++ b/tools/testing/selftests/mm/gup_longterm.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
> index 267eea2e0e0b..edb46888222f 100644
> --- a/tools/testing/selftests/mm/hugepage-mmap.c
> +++ b/tools/testing/selftests/mm/hugepage-mmap.c
> @@ -16,7 +16,6 @@
>   * range.
>   * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
> index c463d1c09c9b..8e22822bb754 100644
> --- a/tools/testing/selftests/mm/hugepage-mremap.c
> +++ b/tools/testing/selftests/mm/hugepage-mremap.c
> @@ -11,8 +11,6 @@
>   * To make sure the test triggers pmd sharing and goes through the 'unshare'
>   * path in the mremap code use 1GB (1024) or more.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index e74107185324..70c40c67bc5d 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -11,8 +11,6 @@
>   * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
>   * directory.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> index ba6cc6f9cabc..6b8b41b4f754 100644
> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
> index 829320a519e7..d18bf400dae6 100644
> --- a/tools/testing/selftests/mm/khugepaged.c
> +++ b/tools/testing/selftests/mm/khugepaged.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>  #include <ctype.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
> index d615767e396b..1deae905c42e 100644
> --- a/tools/testing/selftests/mm/ksm_functional_tests.c
> +++ b/tools/testing/selftests/mm/ksm_functional_tests.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
> index 17bcb07f19f3..d19ad13ffd7e 100644
> --- a/tools/testing/selftests/mm/madv_populate.c
> +++ b/tools/testing/selftests/mm/madv_populate.c
> @@ -6,7 +6,6 @@
>   *
>   * Author(s): David Hildenbrand <david@redhat.com>
>   */
> -#define _GNU_SOURCE
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
> index 5c8a53869b1b..ff4d4079bd0e 100644
> --- a/tools/testing/selftests/mm/map_populate.c
> +++ b/tools/testing/selftests/mm/map_populate.c
> @@ -4,8 +4,6 @@
>   *
>   * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sys/mman.h>
> diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
> index 1e01d3ddc11c..200bedcdc32e 100644
> --- a/tools/testing/selftests/mm/mdwe_test.c
> +++ b/tools/testing/selftests/mm/mdwe_test.c
> @@ -7,7 +7,6 @@
>  #include <linux/mman.h>
>  #include <linux/prctl.h>
>  
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <sys/auxv.h>
> diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
> index 9b298f6a04b3..750adede2816 100644
> --- a/tools/testing/selftests/mm/memfd_secret.c
> +++ b/tools/testing/selftests/mm/memfd_secret.c
> @@ -4,8 +4,6 @@
>   *
>   * Author: Mike Rapoport <rppt@linux.ibm.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <sys/uio.h>
>  #include <sys/mman.h>
>  #include <sys/wait.h>
> diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
> index 26f744188ad0..42574290d728 100644
> --- a/tools/testing/selftests/mm/mlock2-tests.c
> +++ b/tools/testing/selftests/mm/mlock2-tests.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sys/mman.h>
>  #include <stdint.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
> index 100370a7111d..d78bf686e99f 100644
> --- a/tools/testing/selftests/mm/mrelease_test.c
> +++ b/tools/testing/selftests/mm/mrelease_test.c
> @@ -2,7 +2,6 @@
>  /*
>   * Copyright 2022 Google LLC
>   */
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <stdbool.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
> index 1d75084b9ca5..934fa6b441b2 100644
> --- a/tools/testing/selftests/mm/mremap_dontunmap.c
> +++ b/tools/testing/selftests/mm/mremap_dontunmap.c
> @@ -5,7 +5,6 @@
>   *
>   * Copyright 2020, Brian Geffon <bgeffon@google.com>
>   */
> -#define _GNU_SOURCE
>  #include <sys/mman.h>
>  #include <linux/mman.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
> index 2f8b991f78cb..e057154630e0 100644
> --- a/tools/testing/selftests/mm/mremap_test.c
> +++ b/tools/testing/selftests/mm/mremap_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Copyright 2020 Google LLC
>   */
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
> index d59517ed3d48..2a18b5d276f0 100644
> --- a/tools/testing/selftests/mm/pagemap_ioctl.c
> +++ b/tools/testing/selftests/mm/pagemap_ioctl.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <fcntl.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 1af3156a9db8..37d6b01ce90a 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -1,7 +1,6 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
>  #ifndef _PKEYS_HELPER_H
>  #define _PKEYS_HELPER_H
> -#define _GNU_SOURCE
>  #include <string.h>
>  #include <stdarg.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
> index 48dc151f8fca..9f7de92caeda 100644
> --- a/tools/testing/selftests/mm/protection_keys.c
> +++ b/tools/testing/selftests/mm/protection_keys.c
> @@ -21,7 +21,6 @@
>   *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>   *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>   */
> -#define _GNU_SOURCE
>  #define __SANE_USERSPACE_TYPES__
>  #include <errno.h>
>  #include <linux/elf.h>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index d3c7f5fb3e7b..ae6ac950d7a1 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -3,8 +3,6 @@
>   * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
>   * address range in a process via <debugfs>/split_huge_pages interface.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdarg.h>
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index ea7fd8fe2876..28a5c31bd791 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -12,8 +12,6 @@
>     ipcrm -m by hand, like this
>     sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
>     (warning this will remove all if someone else uses them) */
> -
> -#define _GNU_SOURCE 1
>  #include <sys/mman.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
> index cc5629c3d2aa..abb44319264a 100644
> --- a/tools/testing/selftests/mm/uffd-common.h
> +++ b/tools/testing/selftests/mm/uffd-common.h
> @@ -7,7 +7,6 @@
>  #ifndef __UFFD_COMMON_H__
>  #define __UFFD_COMMON_H__
>  
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <errno.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index c6a8c732b802..d894417134b6 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <stdio.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> index bcf51d785a37..bd975670f61d 100644
> --- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> +++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <stdio.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
> index 79a3dd75590e..279d0c5f70d3 100644
> --- a/tools/testing/selftests/net/af_unix/diag_uid.c
> +++ b/tools/testing/selftests/net/af_unix/diag_uid.c
> @@ -1,7 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright Amazon.com Inc. or its affiliates. */
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> index 7e534594167e..2986b8cd0418 100644
> --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
> +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0 OR MIT
> -#define _GNU_SOURCE
>  #include <error.h>
>  #include <limits.h>
>  #include <stddef.h>
> diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
> index d799fd8f5c7c..34e816862cc7 100644
> --- a/tools/testing/selftests/net/af_unix/unix_connect.c
> +++ b/tools/testing/selftests/net/af_unix/unix_connect.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <stddef.h>
> diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
> index 90eb06fefa59..8262aa862331 100644
> --- a/tools/testing/selftests/net/csum.c
> +++ b/tools/testing/selftests/net/csum.c
> @@ -58,9 +58,6 @@
>   * different seed for each run (and logs this for reproducibility). It
>   * is advised to enable this for extra coverage in continuous testing.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/byteorder.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
> index 353e1e867fbb..f5d7032e6466 100644
> --- a/tools/testing/selftests/net/gro.c
> +++ b/tools/testing/selftests/net/gro.c
> @@ -34,9 +34,6 @@
>   * flakiness is to be expected.
>   *
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
> index f9ed749fd8c7..80c9e567a3d8 100644
> --- a/tools/testing/selftests/net/ip_defrag.c
> +++ b/tools/testing/selftests/net/ip_defrag.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
> index be4a30a0d02a..04aa06d26b09 100644
> --- a/tools/testing/selftests/net/ipsec.c
> +++ b/tools/testing/selftests/net/ipsec.c
> @@ -3,9 +3,6 @@
>   * ipsec.c - Check xfrm on veth inside a net-ns.
>   * Copyright (c) 2018 Dmitry Safonov
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/types.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
> index 708a9822259d..b7e0c3c02e20 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel.c
> @@ -1,8 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Test IPV6_FLOWINFO cmsg on send and recv */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/byteorder.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> index af95b48acea9..ebd219ba386e 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> @@ -1,8 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Test IPV6_FLOWINFO_MGR */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index d2043ec3bf6d..ea93030ed3ec 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <limits.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> index 218aac467321..c5bf873d76c2 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> index 926b0be87c99..7203ca9900e9 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
> index bdc03a2097e8..9278bf585c80 100644
> --- a/tools/testing/selftests/net/msg_zerocopy.c
> +++ b/tools/testing/selftests/net/msg_zerocopy.c
> @@ -24,9 +24,6 @@
>   * the kernel queues completions on the error queue for all zerocopy
>   * transfers.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
> index cd8a58097448..88e1d3b2ddf1 100644
> --- a/tools/testing/selftests/net/nettest.c
> +++ b/tools/testing/selftests/net/nettest.c
> @@ -3,8 +3,6 @@
>   *
>   * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
>   */
> -
> -#define _GNU_SOURCE
>  #include <features.h>
>  #include <sys/types.h>
>  #include <sys/ioctl.h>
> diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
> index 1a736f700be4..5b2d34440ae9 100644
> --- a/tools/testing/selftests/net/psock_fanout.c
> +++ b/tools/testing/selftests/net/psock_fanout.c
> @@ -26,9 +26,6 @@
>   * Todo:
>   * - functionality: PACKET_FANOUT_FLAG_DEFRAG
>   */
> -
> -#define _GNU_SOURCE		/* for sched_setaffinity */
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
> index edf1e6f80d41..2f29b513e18f 100644
> --- a/tools/testing/selftests/net/psock_snd.c
> +++ b/tools/testing/selftests/net/psock_snd.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
> index b8475cb29be7..9ee6ece52865 100644
> --- a/tools/testing/selftests/net/reuseport_addr_any.c
> +++ b/tools/testing/selftests/net/reuseport_addr_any.c
> @@ -3,9 +3,6 @@
>  /* Test that sockets listening on a specific address are preferred
>   * over sockets listening on addr_any.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> index 2d646174729f..e93e38cfb2a8 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> @@ -11,9 +11,6 @@
>   * This entire process is done for several different core id permutations
>   * and for each IPv4/IPv6 and TCP/UDP combination.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
> index c9ba36aa688e..502fdb9ce770 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_numa.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
> @@ -3,9 +3,6 @@
>   * Test functionality of BPF filters with SO_REUSEPORT. Same test as
>   * in reuseport_bpf_cpu, only as one socket per NUMA node.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
> index fb7a59ed759e..d3c3d3f39f8f 100644
> --- a/tools/testing/selftests/net/reuseport_dualstack.c
> +++ b/tools/testing/selftests/net/reuseport_dualstack.c
> @@ -10,9 +10,6 @@
>   * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
>   * AF_INET preference for v4 packets.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
> index e9fa14e10732..95bd0cdc3253 100644
> --- a/tools/testing/selftests/net/so_incoming_cpu.c
> +++ b/tools/testing/selftests/net/so_incoming_cpu.c
> @@ -1,6 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright Amazon.com Inc. or its affiliates. */
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
> index b39e87e967cd..18532d564f79 100644
> --- a/tools/testing/selftests/net/so_netns_cookie.c
> +++ b/tools/testing/selftests/net/so_netns_cookie.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <sched.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
> index 8457b7ccbc09..011a24af9786 100644
> --- a/tools/testing/selftests/net/so_txtime.c
> +++ b/tools/testing/selftests/net/so_txtime.c
> @@ -9,9 +9,6 @@
>   * the expected stream. Sender will read transmit timestamps from the error
>   * queue. The streams can differ due to out-of-order delivery and drops.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
> index 247c3b3ac1c9..fa78b92d9740 100644
> --- a/tools/testing/selftests/net/tap.c
> +++ b/tools/testing/selftests/net/tap.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> index c1cb0c75156a..d30f89bb944c 100644
> --- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> +++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> @@ -12,7 +12,6 @@
>   * there are no cases in which a cookie is not accepted by verifying
>   * that TcpExtTCPFastOpenPassiveFail remains 0.
>   */
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
> index bd6a9c7a3e8a..71ee145f151e 100644
> --- a/tools/testing/selftests/net/tcp_inq.c
> +++ b/tools/testing/selftests/net/tcp_inq.c
> @@ -5,8 +5,6 @@
>   *
>   * Simple example on how to use TCP_INQ and TCP_CM_INQ.
>   */
> -#define _GNU_SOURCE
> -
>  #include <error.h>
>  #include <netinet/in.h>
>  #include <netinet/tcp.h>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index 4fcce5150850..72d5f1207ee0 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -46,7 +46,6 @@
>   * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
>   *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
>   */
> -#define _GNU_SOURCE
>  #include <pthread.h>
>  #include <sys/types.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
> index f27a12d2a2c9..6dbad97d1d0a 100644
> --- a/tools/testing/selftests/net/tls.c
> +++ b/tools/testing/selftests/net/tls.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
> index 9ba03164d73a..e2d739892ce4 100644
> --- a/tools/testing/selftests/net/toeplitz.c
> +++ b/tools/testing/selftests/net/toeplitz.c
> @@ -20,9 +20,6 @@
>   * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
>   * 6. Compare the cpus from 4 and 5
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
> index fa83918b62d1..a64dcfb242c1 100644
> --- a/tools/testing/selftests/net/tun.c
> +++ b/tools/testing/selftests/net/tun.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
> index 7d9ea039450a..96972e0110a0 100644
> --- a/tools/testing/selftests/net/txring_overwrite.c
> +++ b/tools/testing/selftests/net/txring_overwrite.c
> @@ -4,9 +4,6 @@
>   * Verify that consecutive sends over packet tx_ring are mirrored
>   * with their original content intact.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <assert.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
> index ec60a16c9307..33dba9e90dea 100644
> --- a/tools/testing/selftests/net/txtimestamp.c
> +++ b/tools/testing/selftests/net/txtimestamp.c
> @@ -16,9 +16,6 @@
>   * This test requires a dummy TCP server.
>   * A simple `nc6 [-u] -l -p $DESTPORT` will do
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <asm/types.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
> index 85b3baa3f7f3..9dc1026a033a 100644
> --- a/tools/testing/selftests/net/udpgso.c
> +++ b/tools/testing/selftests/net/udpgso.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <stddef.h>
>  #include <arpa/inet.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 1cbadd267c96..999df1236320 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <error.h>
>  #include <errno.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
> index 477392715a9a..d7632993b354 100644
> --- a/tools/testing/selftests/net/udpgso_bench_tx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_tx.c
> @@ -1,7 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <error.h>
> diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
> index 5814611a1dc7..ef4d923f4759 100644
> --- a/tools/testing/selftests/perf_events/remove_on_exec.c
> +++ b/tools/testing/selftests/perf_events/remove_on_exec.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2021, Google LLC.
>   */
>  
> -#define _GNU_SOURCE
> -
>  /* We need the latest siginfo from the kernel repo. */
>  #include <sys/types.h>
>  #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
> index d1d8483ac628..14d1a3c8cb5c 100644
> --- a/tools/testing/selftests/perf_events/sigtrap_threads.c
> +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
> @@ -5,8 +5,6 @@
>   * Copyright (C) 2021, Google LLC.
>   */
>  
> -#define _GNU_SOURCE
> -
>  /* We need the latest siginfo from the kernel repo. */
>  #include <sys/types.h>
>  #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
> index 7d84097ad45c..54dc8f16d92a 100644
> --- a/tools/testing/selftests/pid_namespace/regression_enomem.c
> +++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
> index 88d6830ee004..e33177b1aa41 100644
> --- a/tools/testing/selftests/pidfd/pidfd.h
> +++ b/tools/testing/selftests/pidfd/pidfd.h
> @@ -3,7 +3,6 @@
>  #ifndef __PIDFD_H
>  #define __PIDFD_H
>  
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 01cc37bf611c..67c9dc436c71 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> index cd51d547b751..b6a0e9b3d2f5 100644
> --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..781a3931fb5a 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <inttypes.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..a40fb27a78bb 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/types.h>
>  #include <poll.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> index 6e2f2cd400ca..49d7a78cc4fe 100644
> --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index c081ae91313a..c3d52406b8fd 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
> index 0dcb8365ddc3..54beba0983f1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_wait.c
> +++ b/tools/testing/selftests/pidfd/pidfd_wait.c
> @@ -1,6 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <linux/sched.h>
>  #include <linux/types.h>
> diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
> index 5297b10d25c3..054a78ebe8b5 100644
> --- a/tools/testing/selftests/ptrace/get_set_sud.c
> +++ b/tools/testing/selftests/ptrace/get_set_sud.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include "../kselftest_harness.h"
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
> index a6884f66dc01..1b7b77190f72 100644
> --- a/tools/testing/selftests/ptrace/peeksiginfo.c
> +++ b/tools/testing/selftests/ptrace/peeksiginfo.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <signal.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> index 2348d2c20d0a..5961c24ee1ae 100644
> --- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> +++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <pthread.h>
>  #include <sched.h>
> diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
> index 295eea16466f..1fed749b4bd7 100644
> --- a/tools/testing/selftests/rseq/basic_test.c
> +++ b/tools/testing/selftests/rseq/basic_test.c
> @@ -2,8 +2,6 @@
>  /*
>   * Basic test coverage for critical regions and rseq_current_cpu().
>   */
> -
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <sched.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
> index 2f37961240ca..48a55d94eb72 100644
> --- a/tools/testing/selftests/rseq/param_test.c
> +++ b/tools/testing/selftests/rseq/param_test.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <linux/membarrier.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
> index 96e812bdf8a4..88602889414c 100644
> --- a/tools/testing/selftests/rseq/rseq.c
> +++ b/tools/testing/selftests/rseq/rseq.c
> @@ -14,8 +14,6 @@
>   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>   * Lesser General Public License for more details.
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <sched.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> index b83099160fbc..3632a4890da9 100644
> --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
> +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> @@ -2,7 +2,6 @@
>   * Strictly speaking, this is not a test. But it can report during test
>   * runs so relative performace can be measured.
>   */
> -#define _GNU_SOURCE
>  #include <assert.h>
>  #include <err.h>
>  #include <limits.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 783ebce8c4de..972ccc12553e 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -4,8 +4,6 @@
>   *
>   * Test code for seccomp bpf.
>   */
> -
> -#define _GNU_SOURCE
>  #include <sys/types.h>
>  
>  /*
> diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
> index 7288a05136ba..a1f156dbbd56 100644
> --- a/tools/testing/selftests/user_events/abi_test.c
> +++ b/tools/testing/selftests/user_events/abi_test.c
> @@ -4,8 +4,6 @@
>   *
>   * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
>   */
> -
> -#define _GNU_SOURCE
>  #include <sched.h>
>  
>  #include <errno.h>
> diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
> index d884fd69dd51..9441635fc452 100644
> --- a/tools/testing/selftests/x86/amx.c
> +++ b/tools/testing/selftests/x86/amx.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <errno.h>
>  #include <pthread.h>
> diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
> index 3bc95f3ed585..0129cdae8abe 100644
> --- a/tools/testing/selftests/x86/check_initial_reg_state.c
> +++ b/tools/testing/selftests/x86/check_initial_reg_state.c
> @@ -3,9 +3,6 @@
>   * check_initial_reg_state.c - check that execve sets the correct state
>   * Copyright (c) 2014-2016 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  
>  unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
> diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
> index cf9ce8fbb656..d2c746149678 100644
> --- a/tools/testing/selftests/x86/corrupt_xstate_header.c
> +++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
> @@ -4,9 +4,6 @@
>   *
>   * Based on analysis and a test case from Thomas Gleixner.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
> index d1e919b0c1dc..9fa9d4a847ac 100644
> --- a/tools/testing/selftests/x86/entry_from_vm86.c
> +++ b/tools/testing/selftests/x86/entry_from_vm86.c
> @@ -5,9 +5,6 @@
>   *
>   * This exercises a few paths that need to special-case vm86 mode.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <assert.h>
>  #include <stdlib.h>
>  #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
> index 8c780cce941d..348134d2cefc 100644
> --- a/tools/testing/selftests/x86/fsgsbase.c
> +++ b/tools/testing/selftests/x86/fsgsbase.c
> @@ -3,8 +3,6 @@
>   * fsgsbase.c, an fsgsbase test
>   * Copyright (c) 2014-2016 Andy Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
> index 6fffadc51579..88dce47ab8e6 100644
> --- a/tools/testing/selftests/x86/fsgsbase_restore.c
> +++ b/tools/testing/selftests/x86/fsgsbase_restore.c
> @@ -12,8 +12,6 @@
>   *
>   * This is not part of fsgsbase.c, because that test is 64-bit only.
>   */
> -
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
> index 57ec5e99edb9..07b7c10f8d39 100644
> --- a/tools/testing/selftests/x86/ioperm.c
> +++ b/tools/testing/selftests/x86/ioperm.c
> @@ -3,8 +3,6 @@
>   * ioperm.c - Test case for ioperm(2)
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
> index 7e3e09c1abac..baa691154905 100644
> --- a/tools/testing/selftests/x86/iopl.c
> +++ b/tools/testing/selftests/x86/iopl.c
> @@ -3,8 +3,6 @@
>   * iopl.c - Test case for a Linux on Xen 64-bit bug
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
> index 215b8150b7cc..39edfd7f6037 100644
> --- a/tools/testing/selftests/x86/lam.c
> +++ b/tools/testing/selftests/x86/lam.c
> @@ -1,5 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
> index 3a29346e1452..3b4237a85a12 100644
> --- a/tools/testing/selftests/x86/ldt_gdt.c
> +++ b/tools/testing/selftests/x86/ldt_gdt.c
> @@ -3,8 +3,6 @@
>   * ldt_gdt.c - Test cases for LDT and GDT access
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
>  #include <err.h>
>  #include <stdio.h>
>  #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
> index cc3de6ff9fba..47ecc63220b7 100644
> --- a/tools/testing/selftests/x86/mov_ss_trap.c
> +++ b/tools/testing/selftests/x86/mov_ss_trap.c
> @@ -19,8 +19,6 @@
>   *
>   * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
>   */
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <sys/ptrace.h>
>  #include <sys/types.h>
> diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
> index ea4a4e246879..97c5b34096cc 100644
> --- a/tools/testing/selftests/x86/nx_stack.c
> +++ b/tools/testing/selftests/x86/nx_stack.c
> @@ -23,8 +23,6 @@
>   * Regular stack is completely overwritten before testing.
>   * Test doesn't exit SIGSEGV handler after first fault at INT3.
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE
>  #undef NDEBUG
>  #include <assert.h>
>  #include <signal.h>
> diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
> index 12aaa063196e..bdc81c8bd1a7 100644
> --- a/tools/testing/selftests/x86/ptrace_syscall.c
> +++ b/tools/testing/selftests/x86/ptrace_syscall.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>  #include <sys/ptrace.h>
>  #include <sys/types.h>
>  #include <sys/wait.h>
> diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
> index f689af75e979..7f41c3a4268b 100644
> --- a/tools/testing/selftests/x86/sigaltstack.c
> +++ b/tools/testing/selftests/x86/sigaltstack.c
> @@ -1,6 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> -
> -#define _GNU_SOURCE
>  #include <signal.h>
>  #include <stdio.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
> index 5d7961a5f7f6..2054f729b2c2 100644
> --- a/tools/testing/selftests/x86/sigreturn.c
> +++ b/tools/testing/selftests/x86/sigreturn.c
> @@ -24,9 +24,6 @@
>   *
>   * Do not run on outdated, unpatched kernels at risk of nasty crashes.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/time.h>
>  #include <time.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
> index 9a30f443e928..375f3b50a0b5 100644
> --- a/tools/testing/selftests/x86/single_step_syscall.c
> +++ b/tools/testing/selftests/x86/single_step_syscall.c
> @@ -9,9 +9,6 @@
>   * immediately issues #DB from CPL 0.  This requires special handling in
>   * the kernel.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/time.h>
>  #include <time.h>
>  #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
> index 461fa41a4d02..10eee1bcd015 100644
> --- a/tools/testing/selftests/x86/syscall_arg_fault.c
> +++ b/tools/testing/selftests/x86/syscall_arg_fault.c
> @@ -3,9 +3,6 @@
>   * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
>   * Copyright (c) 2015 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
> index 991591718bb0..c72fc8aaa4d3 100644
> --- a/tools/testing/selftests/x86/syscall_numbering.c
> +++ b/tools/testing/selftests/x86/syscall_numbering.c
> @@ -5,9 +5,6 @@
>   *
>   * Copyright (c) 2018 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
> index 84d74be1d902..24bc219358a5 100644
> --- a/tools/testing/selftests/x86/sysret_rip.c
> +++ b/tools/testing/selftests/x86/sysret_rip.c
> @@ -3,9 +3,6 @@
>   * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
>   * Copyright (c) 2014-2016 Andrew Lutomirski
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
> index 5f3d4fca440f..f8b9e0b2a0c5 100644
> --- a/tools/testing/selftests/x86/sysret_ss_attrs.c
> +++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
> @@ -7,9 +7,6 @@
>   * the hidden attributes set to an unusable state.  Make sure the kernel
>   * doesn't let this happen.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdlib.h>
>  #include <unistd.h>
>  #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
> index 6b5036fbb735..0c9431ba7d31 100644
> --- a/tools/testing/selftests/x86/test_FCMOV.c
> +++ b/tools/testing/selftests/x86/test_FCMOV.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
> index aec6692c6dcf..ba186665918d 100644
> --- a/tools/testing/selftests/x86/test_FCOMI.c
> +++ b/tools/testing/selftests/x86/test_FCOMI.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
> index 09789c0ce3e9..95580cdaaa32 100644
> --- a/tools/testing/selftests/x86/test_FISTTP.c
> +++ b/tools/testing/selftests/x86/test_FISTTP.c
> @@ -1,8 +1,4 @@
>  // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
> index f0d876d48277..a8bdba356682 100644
> --- a/tools/testing/selftests/x86/test_mremap_vdso.c
> +++ b/tools/testing/selftests/x86/test_mremap_vdso.c
> @@ -9,7 +9,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_mremap_vdso.c
>   */
> -#define _GNU_SOURCE
>  #include <stdio.h>
>  #include <errno.h>
>  #include <unistd.h>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 757e6527f67e..0ceca9064cec 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -7,9 +7,6 @@
>   * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
>   * stick to the basics and hope the compiler doesn't do anything strange.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <sys/syscall.h>
>  #include <asm/mman.h>
>  #include <sys/mman.h>
> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
> index 47cab972807c..cbf4e5012005 100644
> --- a/tools/testing/selftests/x86/test_vsyscall.c
> +++ b/tools/testing/selftests/x86/test_vsyscall.c
> @@ -1,7 +1,4 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
> -
>  #include <stdio.h>
>  #include <sys/time.h>
>  #include <time.h>
> diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
> index 4c311e1af4c7..754f5d4d425a 100644
> --- a/tools/testing/selftests/x86/unwind_vdso.c
> +++ b/tools/testing/selftests/x86/unwind_vdso.c
> @@ -5,9 +5,6 @@
>   *
>   * This tests __kernel_vsyscall's unwind info.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <features.h>
>  #include <stdio.h>
>  
> diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
> index fe99f2434155..8193de22a390 100644
> --- a/tools/testing/selftests/x86/vdso_restorer.c
> +++ b/tools/testing/selftests/x86/vdso_restorer.c
> @@ -10,9 +10,6 @@
>   * 64-bit userspace has never supported sa_restorer == NULL, so this is
>   * 32-bit only.
>   */
> -
> -#define _GNU_SOURCE
> -
>  #include <err.h>
>  #include <stdio.h>
>  #include <dlfcn.h>

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Sean Christopherson]

On Tue, May 07, 2024, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.

...

> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1

AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU
stuff is just the result of misguided copy+paste.  But it would be nice to get
confirmation that this test isn't doing something clever.  Or at the very least,
explain the removal of __USE_GNU in the changelog.

>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Sean Christopherson]

On Tue, May 07, 2024, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.

...

> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1

AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU
stuff is just the result of misguided copy+paste.  But it would be nice to get
confirmation that this test isn't doing something clever.  Or at the very least,
explain the removal of __USE_GNU in the changelog.

>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>

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[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Sean Christopherson]

On Tue, May 07, 2024, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.

...

> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>   * Can be built statically:
>   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>   */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1

AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU
stuff is just the result of misguided copy+paste.  But it would be nice to get
confirmation that this test isn't doing something clever.  Or at the very least,
explain the removal of __USE_GNU in the changelog.

>  #include <unistd.h>
>  #include <stdlib.h>
>  #include <string.h>

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Edward Liaw]

On Wed, May 8, 2024 at 6:54 AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Tue, May 07, 2024, Edward Liaw wrote:
> > _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> > prevent _GNU_SOURCE redefined warnings.
>
> ...
>
> > diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> > index 8965c311bd65..5cd13279bba5 100644
> > --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> > +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> > @@ -8,10 +8,6 @@
> >   * Can be built statically:
> >   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
> >   */
> > -#undef _GNU_SOURCE
> > -#define _GNU_SOURCE 1
> > -#undef __USE_GNU
> > -#define __USE_GNU 1
>
> AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU
> stuff is just the result of misguided copy+paste.  But it would be nice to get
> confirmation that this test isn't doing something clever.  Or at the very least,
> explain the removal of __USE_GNU in the changelog.

It looks like test_syscall_vdso, test_FCMOV, test_FCOMI, and
test_FISTTP don't actually use any GNU extensions.  I'll add that to
the commit message.


>
> >  #include <unistd.h>
> >  #include <stdlib.h>
> >  #include <string.h>

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Edward Liaw]

On Wed, May 8, 2024 at 6:54 AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Tue, May 07, 2024, Edward Liaw wrote:
> > _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> > prevent _GNU_SOURCE redefined warnings.
>
> ...
>
> > diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> > index 8965c311bd65..5cd13279bba5 100644
> > --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> > +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> > @@ -8,10 +8,6 @@
> >   * Can be built statically:
> >   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
> >   */
> > -#undef _GNU_SOURCE
> > -#define _GNU_SOURCE 1
> > -#undef __USE_GNU
> > -#define __USE_GNU 1
>
> AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU
> stuff is just the result of misguided copy+paste.  But it would be nice to get
> confirmation that this test isn't doing something clever.  Or at the very least,
> explain the removal of __USE_GNU in the changelog.

It looks like test_syscall_vdso, test_FCMOV, test_FCOMI, and
test_FISTTP don't actually use any GNU extensions.  I'll add that to
the commit message.


>
> >  #include <unistd.h>
> >  #include <stdlib.h>
> >  #include <string.h>

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[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[Edward Liaw]

On Wed, May 8, 2024 at 6:54?AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Tue, May 07, 2024, Edward Liaw wrote:
> > _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> > prevent _GNU_SOURCE redefined warnings.
>
> ...
>
> > diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> > index 8965c311bd65..5cd13279bba5 100644
> > --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> > +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> > @@ -8,10 +8,6 @@
> >   * Can be built statically:
> >   * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
> >   */
> > -#undef _GNU_SOURCE
> > -#define _GNU_SOURCE 1
> > -#undef __USE_GNU
> > -#define __USE_GNU 1
>
> AFAICT, manually defining __USE_GNU is frowned upon, so I'm guessing the __USE_GNU
> stuff is just the result of misguided copy+paste.  But it would be nice to get
> confirmation that this test isn't doing something clever.  Or at the very least,
> explain the removal of __USE_GNU in the changelog.

It looks like test_syscall_vdso, test_FCMOV, test_FCOMI, and
test_FISTTP don't actually use any GNU extensions.  I'll add that to
the commit message.


>
> >  #include <unistd.h>
> >  #include <stdlib.h>
> >  #include <string.h>

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---

Very nice.

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

thanks,
-- 
John Hubbard
NVIDIA

>   tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>   tools/testing/selftests/capabilities/test_execve.c            | 2 --
>   tools/testing/selftests/clone3/clone3.c                       | 2 --
>   .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>   tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>   tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>   tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>   tools/testing/selftests/core/close_range_test.c               | 2 --
>   tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>   tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>   tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>   tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>   tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>   tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>   tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>   tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>   tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>   .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>   tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>   tools/testing/selftests/ipc/msgque.c                          | 1 -
>   tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>   tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>   tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>   tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>   tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>   tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>   tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>   tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>   tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>   tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>   tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>   tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>   tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>   tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>   tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>   tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>   tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>   tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>   tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>   tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>   tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>   .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>   tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>   tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>   tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>   tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>   tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>   tools/testing/selftests/kvm/steal_time.c                      | 1 -
>   tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>   .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>   tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>   tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>   tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>   .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>   tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>   .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>   tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>   tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>   tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>   tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>   tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>   .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>   tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>   tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>   tools/testing/selftests/landlock/base_test.c                  | 2 --
>   tools/testing/selftests/landlock/fs_test.c                    | 2 --
>   tools/testing/selftests/landlock/net_test.c                   | 2 --
>   tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>   tools/testing/selftests/lsm/common.c                          | 2 --
>   tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>   tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>   tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>   tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>   .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>   .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>   tools/testing/selftests/memfd/common.c                        | 1 -
>   tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>   tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>   tools/testing/selftests/mm/cow.c                              | 1 -
>   tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>   tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>   tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>   tools/testing/selftests/mm/khugepaged.c                       | 1 -
>   tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>   tools/testing/selftests/mm/madv_populate.c                    | 1 -
>   tools/testing/selftests/mm/map_populate.c                     | 2 --
>   tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>   tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>   tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>   tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>   tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>   tools/testing/selftests/mm/mremap_test.c                      | 2 --
>   tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>   tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>   tools/testing/selftests/mm/protection_keys.c                  | 1 -
>   tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>   tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>   tools/testing/selftests/mm/uffd-common.h                      | 1 -
>   tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>   .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>   tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>   tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>   tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>   tools/testing/selftests/net/csum.c                            | 3 ---
>   tools/testing/selftests/net/gro.c                             | 3 ---
>   tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>   tools/testing/selftests/net/ipsec.c                           | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>   tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>   tools/testing/selftests/net/nettest.c                         | 2 --
>   tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>   tools/testing/selftests/net/psock_snd.c                       | 3 ---
>   tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>   tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>   tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>   tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>   tools/testing/selftests/net/so_txtime.c                       | 3 ---
>   tools/testing/selftests/net/tap.c                             | 3 ---
>   tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>   tools/testing/selftests/net/tcp_inq.c                         | 2 --
>   tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>   tools/testing/selftests/net/tls.c                             | 3 ---
>   tools/testing/selftests/net/toeplitz.c                        | 3 ---
>   tools/testing/selftests/net/tun.c                             | 3 ---
>   tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>   tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>   tools/testing/selftests/net/udpgso.c                          | 3 ---
>   tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>   tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>   tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>   tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>   tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>   tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>   tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>   tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>   tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>   tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>   tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>   tools/testing/selftests/rseq/basic_test.c                     | 2 --
>   tools/testing/selftests/rseq/param_test.c                     | 1 -
>   tools/testing/selftests/rseq/rseq.c                           | 2 --
>   tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>   tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>   tools/testing/selftests/user_events/abi_test.c                | 2 --
>   tools/testing/selftests/x86/amx.c                             | 2 --
>   tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>   tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>   tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>   tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>   tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>   tools/testing/selftests/x86/ioperm.c                          | 2 --
>   tools/testing/selftests/x86/iopl.c                            | 2 --
>   tools/testing/selftests/x86/lam.c                             | 1 -
>   tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>   tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>   tools/testing/selftests/x86/nx_stack.c                        | 2 --
>   tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>   tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>   tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>   tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>   tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>   tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>   tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>   tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>   tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>   tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>   tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>   tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>   tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>   tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>   tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>   tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>   tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>   198 files changed, 405 deletions(-)
> 
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index b171fd53b004..c1a6ce7b0912 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdbool.h>
>   #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
> index 7cde07a5df78..e3954b88c3ee 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <cap-ng.h>
>   #include <linux/capability.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 3c9bf0cd82a8..3c5e45dae617 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -1,8 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   
>   /* Based on Christian Brauner's clone3() example */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <inttypes.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> index 31b56d625655..bb99ea20f7d5 100644
> --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> @@ -7,8 +7,6 @@
>    */
>   
>   /* capabilities related code based on selftests/bpf/test_verifier.c */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <linux/sched.h>
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 54a8b2445be9..50336d56db6b 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <sched.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
> index 3d2663fe50ba..172e19d5515f 100644
> --- a/tools/testing/selftests/clone3/clone3_selftests.h
> +++ b/tools/testing/selftests/clone3/clone3_selftests.h
> @@ -3,7 +3,6 @@
>   #ifndef _CLONE3_SELFTESTS_H
>   #define _CLONE3_SELFTESTS_H
>   
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <linux/sched.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index ed785afb6077..8b5ed4484ee6 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -5,8 +5,6 @@
>    * These tests are assuming to be running in the host's
>    * PID namespace.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <linux/sched.h>
> diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
> index c59e4adb905d..1c2902bcc913 100644
> --- a/tools/testing/selftests/core/close_range_test.c
> +++ b/tools/testing/selftests/core/close_range_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> index c812080e304e..7c8dbab8ac44 100644
> --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> +++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> index e0319417124d..6b411859c2cd 100644
> --- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <sys/stat.h>
>   #include <sys/types.h>
> diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> index 5f362c0fd890..fca693db1b09 100644
> --- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
> index b1fc9b916ace..73766447eeb0 100644
> --- a/tools/testing/selftests/filesystems/devpts_pts.c
> +++ b/tools/testing/selftests/filesystems/devpts_pts.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
> index c0a9b2d3302d..05367a70b963 100644
> --- a/tools/testing/selftests/filesystems/dnotify_test.c
> +++ b/tools/testing/selftests/filesystems/dnotify_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE	/* needed to get the defines */
>   #include <fcntl.h>	/* in glibc 2.2 this has the needed
>   				   values defined */
>   #include <signal.h>
> diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> index 65ede506305c..9bc2ddad7e92 100644
> --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <asm/unistd.h>
>   #include <linux/time_types.h>
>   #include <poll.h>
> diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> index f142a137526c..17935f42fbc9 100644
> --- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> +++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <asm/unistd.h>
> diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> index e488ad354fce..56cf3ad8640d 100644
> --- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
> +++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> @@ -6,8 +6,6 @@
>    * Copyright 2022 Red Hat Inc.
>    * Author: Javier Martinez Canillas <javierm@redhat.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> index 759f86e7d263..b58a80bde95a 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> +++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <inttypes.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> index 3eafd7da58e2..d1cefd1b7d16 100644
> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <stdint.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> index 7f3ca5c78df1..8e41f9fe784c 100644
> --- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> +++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> @@ -16,9 +16,6 @@
>    *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
>    *
>    *****************************************************************************/
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <limits.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..291c81d59a9d 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 25110c7c0b3e..885c9e943cee 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> index 4eaba83cdcf3..5369959e9fc2 100644
> --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
> +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright (c) 2021, Google LLC.
>    */
> -#define _GNU_SOURCE
> -
>   #include "arch_timer.h"
>   #include "delay.h"
>   #include "gic.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> index 5972905275cf..79e99f47a9fe 100644
> --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> @@ -7,7 +7,6 @@
>    * hugetlbfs with a hole). It checks that the expected handling method is
>    * called (e.g., uffd faults with the right address and write/read flag).
>    */
> -#define _GNU_SOURCE
>   #include <linux/bitmap.h>
>   #include <fcntl.h>
>   #include <test_util.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> index 9b004905d1d3..1c8c6f0c1ca3 100644
> --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> @@ -10,9 +10,6 @@
>    *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
>    *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <linux/psci.h>
>   
>   #include "kvm_util.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index ca917c71ff60..b3b5fb0ff0a9 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE
>   #include <linux/kernel.h>
>   #include <sys/syscall.h>
>   #include <asm/kvm.h>
> diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
> index ae1f1a6d8312..fcebd8d81ce4 100644
> --- a/tools/testing/selftests/kvm/arch_timer.c
> +++ b/tools/testing/selftests/kvm/arch_timer.c
> @@ -19,9 +19,6 @@
>    *
>    * Copyright (c) 2021, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <pthread.h>
>   #include <linux/sizes.h>
> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
> index bf3609f71854..0c4d3b6afbf8 100644
> --- a/tools/testing/selftests/kvm/demand_paging_test.c
> +++ b/tools/testing/selftests/kvm/demand_paging_test.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019, Google, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
> index eaad5b20854c..bf1ebc29f22a 100644
> --- a/tools/testing/selftests/kvm/dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/dirty_log_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Red Hat, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index 92eae206baa6..309fe84b84ad 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Author: Chao Peng <chao.p.peng@linux.intel.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
> index decc521fc760..bce73bcb973c 100644
> --- a/tools/testing/selftests/kvm/hardware_disable_test.c
> +++ b/tools/testing/selftests/kvm/hardware_disable_test.c
> @@ -4,9 +4,6 @@
>    * kvm_arch_hardware_disable is called and it attempts to unregister the user
>    * return notifiers.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <fcntl.h>
>   #include <pthread.h>
>   #include <semaphore.h>
> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> index 877449c34592..a9d97c213584 100644
> --- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -5,9 +5,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019-2022 Google LLC
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <time.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> index 698c1cfa3111..f02355c3c4c2 100644
> --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> @@ -6,8 +6,6 @@
>    *
>    * Test the fd-based interface for KVM statistics.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> index b9e23265e4b3..c78f34699f73 100644
> --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> @@ -6,8 +6,6 @@
>    *
>    * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
> index e0ba97ac1c56..7759c685086b 100644
> --- a/tools/testing/selftests/kvm/kvm_page_table_test.c
> +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
> @@ -8,9 +8,6 @@
>    * page size have been pre-allocated on your system, if you are planning to
>    * use hugepages to back the guest memory for testing.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
> index 2bd25b191d15..b49690658c60 100644
> --- a/tools/testing/selftests/kvm/lib/assert.c
> +++ b/tools/testing/selftests/kvm/lib/assert.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
> -
>   #include "test_util.h"
>   
>   #include <execinfo.h>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index b2262b5fad9e..1eaf001d0ad4 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (C) 2018, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
>   #include "test_util.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
> index cf2c73971308..555e3932e529 100644
> --- a/tools/testing/selftests/kvm/lib/memstress.c
> +++ b/tools/testing/selftests/kvm/lib/memstress.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2020, Google LLC.
>    */
> -#define _GNU_SOURCE
> -
>   #include <inttypes.h>
>   #include <linux/bitmap.h>
>   
> diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
> index 5a8f8becb129..8ed0b74ae837 100644
> --- a/tools/testing/selftests/kvm/lib/test_util.c
> +++ b/tools/testing/selftests/kvm/lib/test_util.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (C) 2020, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdarg.h>
>   #include <assert.h>
> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> index f4eef6eb2dc2..bd07568a5240 100644
> --- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019-2022 Google LLC
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> index e248d3364b9c..e83809febae1 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <stdint.h>
>   #include <stdbool.h>
>   
> diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
> index 1a6da7389bf1..0b9678858b6d 100644
> --- a/tools/testing/selftests/kvm/max_guest_memory_test.c
> +++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> index 156361966612..05fcf902e067 100644
> --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2020, Google, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..4b5004ef9c6b 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -7,9 +7,6 @@
>    *
>    * Copyright (c) 2024, Intel Corporation.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include "arch_timer.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
> index 28f97fb52044..b3536400f9ac 100644
> --- a/tools/testing/selftests/kvm/rseq_test.c
> +++ b/tools/testing/selftests/kvm/rseq_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
> index 626a2b8a2037..84ba79c42ab1 100644
> --- a/tools/testing/selftests/kvm/s390x/cmma_test.c
> +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
> @@ -7,8 +7,6 @@
>    * Authors:
>    *  Nico Boehr <nrb@linux.ibm.com>
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> index 43fb25ddc3ec..53def355ccba 100644
> --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> @@ -10,8 +10,6 @@
>    *
>    * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index bd57d991e27d..214ff84f6fdb 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <pthread.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
> index bae0c5026f82..e9231387c589 100644
> --- a/tools/testing/selftests/kvm/steal_time.c
> +++ b/tools/testing/selftests/kvm/steal_time.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <time.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
> index eae521f050e0..8e5713e36d4b 100644
> --- a/tools/testing/selftests/kvm/x86_64/amx_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
> @@ -6,8 +6,6 @@
>    *
>    * Tests for amx #NM exception and save/restore.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> index 6c2e5e0ceb1f..9c21b6bccc38 100644
> --- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "flds_emulation.h"
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> index df351ae17029..10b1b0ba374e 100644
> --- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2023, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> index 5c27efbf405e..4f5881d4ef66 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> @@ -7,8 +7,6 @@
>    * This work is licensed under the terms of the GNU GPL, version 2.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> index 4c7257ecd2a6..4f3f3a9b038b 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for Enlightened VMCS, including nested guest state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> index f1617762c22f..8206f5ef42dd 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2022, Red Hat, Inc.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <pthread.h>
>   #include <inttypes.h>
>   
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> index c9b18707edc0..b987a3d79715 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for Hyper-V extensions to SVM.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> index 05b56095cf76..077cd0ec3040 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2022, Red Hat, Inc.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <asm/barrier.h>
>   #include <pthread.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> index 3670331adf21..3eb0313ffa39 100644
> --- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "test_util.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> index 17bbb96fc4df..e7efb2b35f8b 100644
> --- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> @@ -5,9 +5,6 @@
>    *
>    * Copyright (C) 2022, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <fcntl.h>
>   #include <stdint.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> index 87011965dc41..2165b1ad8b38 100644
> --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> @@ -9,8 +9,6 @@
>    * Verifies expected behavior of controlling guest access to
>    * MSR_PLATFORM_INFO.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 26c85815f7e9..77f14138594e 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2023, Tencent, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <x86intrin.h>
>   
>   #include "pmu.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index 3c85d1ae9893..5ce53b8c46e0 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -9,9 +9,6 @@
>    * Verifies the expected behavior of allow lists and deny lists for
>    * virtual PMU events.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "kvm_util.h"
>   #include "pmu.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> index e0f642d2a3c4..82a8d88b5338 100644
> --- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> @@ -2,7 +2,6 @@
>   /*
>    * Copyright (C) 2022, Google LLC.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <limits.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> index 366cf18600bc..d691d86e5bc3 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE /* for program_invocation_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> index 3610981d9162..c021c0795a96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> @@ -10,7 +10,6 @@
>    * That bug allowed a user-mode program that called the KVM_SET_SREGS
>    * ioctl to put a VCPU's local APIC into an invalid state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> index 416207c38a17..362be40fc00d 100644
> --- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> @@ -5,9 +5,6 @@
>    * Test that KVM emulates instructions in response to EPT violations when
>    * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "flds_emulation.h"
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
> index e18b86666e1f..55c88d664a94 100644
> --- a/tools/testing/selftests/kvm/x86_64/smm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for SMM.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
> index 88b58aab7207..1c756db329e5 100644
> --- a/tools/testing/selftests/kvm/x86_64/state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/state_test.c
> @@ -6,7 +6,6 @@
>    *
>    * Tests for vCPU state save/restore, including nested guest state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> index adb5593daf48..8fa3948b0170 100644
> --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> @@ -8,8 +8,6 @@
>    * including requesting an invalid register set, updates to/from values
>    * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> index dcbb3c29fb8e..abe71946941f 100644
> --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> @@ -17,8 +17,6 @@
>    * delivered into the guest or not.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <pthread.h>
>   #include <inttypes.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> index f4f61a2d2464..53afbea4df88 100644
> --- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Tests for exiting into userspace on registered MSRs
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "kvm_test_harness.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> index 977948fd52e6..fa512d033205 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Red Hat, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> index ea0cb3cae0f7..3b93f262b797 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> @@ -10,7 +10,6 @@
>    * and check it can be retrieved with KVM_GET_MSR, also test
>    * the invalid LBR formats are rejected.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> index affc32800158..00dd2ac07a61 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> @@ -9,7 +9,6 @@
>    * value instead of partially decayed timer value
>    *
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> index 725c206ba0b9..c78e5f755116 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> @@ -19,8 +19,6 @@
>    * Migration is a command line option. When used on non-numa machines will
>    * exit with error. Test is still usefull on non-numa for testing IPIs.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <getopt.h>
>   #include <pthread.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> index ab75b873a4ad..69849acd95b0 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> index 167c97abff1b..f331a4e9bae3 100644
> --- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Tests for the IA32_XSS MSR.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index a6f89aaea77d..bdb3955a9452 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>    * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>    * Copyright © 2019-2020 ANSSI
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 9a6036fbf289..acec1c82c8b4 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>    * Copyright © 2020 ANSSI
>    * Copyright © 2020-2022 Microsoft Corporation
>    */
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <linux/landlock.h>
>   #include <linux/magic.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>    * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
>    * Copyright © 2023 Microsoft Corporation
>    */
> -
> -#define _GNU_SOURCE
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>    * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>    * Copyright © 2019-2020 ANSSI
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
> index 9ad258912646..1b18aac570f1 100644
> --- a/tools/testing/selftests/lsm/common.c
> +++ b/tools/testing/selftests/lsm/common.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright © 2023 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> index df215e4aa63f..7465bde3f922 100644
> --- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> index 06d24d4679a6..a6b44e25c21f 100644
> --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
> +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <string.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> index 66dec47e3ca3..110c6a07e74c 100644
> --- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <string.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> index af89855adb7b..a8a60b6271a5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
> +++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> @@ -1,5 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index a9cc17facfb3..b4651e2ade00 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index 4cdc8b1d124c..17ae5199b916 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
> index 8eb3d75f6e60..879d4f4c66fa 100644
> --- a/tools/testing/selftests/memfd/common.c
> +++ b/tools/testing/selftests/memfd/common.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
> index 93798c8c5d54..15bc189bf831 100644
> --- a/tools/testing/selftests/memfd/fuse_test.c
> +++ b/tools/testing/selftests/memfd/fuse_test.c
> @@ -12,8 +12,6 @@
>    * the read() syscall with our memory-mapped memfd object as receive buffer to
>    * force the kernel to write into our memfd object.
>    */
> -
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index 18f585684e20..5172c27a8748 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 363bf5f801be..6f1a36d51f19 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
> index ad168d35b23b..3bfd5a630081 100644
> --- a/tools/testing/selftests/mm/gup_longterm.c
> +++ b/tools/testing/selftests/mm/gup_longterm.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
> index 267eea2e0e0b..edb46888222f 100644
> --- a/tools/testing/selftests/mm/hugepage-mmap.c
> +++ b/tools/testing/selftests/mm/hugepage-mmap.c
> @@ -16,7 +16,6 @@
>    * range.
>    * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
> index c463d1c09c9b..8e22822bb754 100644
> --- a/tools/testing/selftests/mm/hugepage-mremap.c
> +++ b/tools/testing/selftests/mm/hugepage-mremap.c
> @@ -11,8 +11,6 @@
>    * To make sure the test triggers pmd sharing and goes through the 'unshare'
>    * path in the mremap code use 1GB (1024) or more.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index e74107185324..70c40c67bc5d 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -11,8 +11,6 @@
>    * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
>    * directory.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> index ba6cc6f9cabc..6b8b41b4f754 100644
> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
> index 829320a519e7..d18bf400dae6 100644
> --- a/tools/testing/selftests/mm/khugepaged.c
> +++ b/tools/testing/selftests/mm/khugepaged.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>   #include <ctype.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
> index d615767e396b..1deae905c42e 100644
> --- a/tools/testing/selftests/mm/ksm_functional_tests.c
> +++ b/tools/testing/selftests/mm/ksm_functional_tests.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
> index 17bcb07f19f3..d19ad13ffd7e 100644
> --- a/tools/testing/selftests/mm/madv_populate.c
> +++ b/tools/testing/selftests/mm/madv_populate.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
> index 5c8a53869b1b..ff4d4079bd0e 100644
> --- a/tools/testing/selftests/mm/map_populate.c
> +++ b/tools/testing/selftests/mm/map_populate.c
> @@ -4,8 +4,6 @@
>    *
>    * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sys/mman.h>
> diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
> index 1e01d3ddc11c..200bedcdc32e 100644
> --- a/tools/testing/selftests/mm/mdwe_test.c
> +++ b/tools/testing/selftests/mm/mdwe_test.c
> @@ -7,7 +7,6 @@
>   #include <linux/mman.h>
>   #include <linux/prctl.h>
>   
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <sys/auxv.h>
> diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
> index 9b298f6a04b3..750adede2816 100644
> --- a/tools/testing/selftests/mm/memfd_secret.c
> +++ b/tools/testing/selftests/mm/memfd_secret.c
> @@ -4,8 +4,6 @@
>    *
>    * Author: Mike Rapoport <rppt@linux.ibm.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <sys/uio.h>
>   #include <sys/mman.h>
>   #include <sys/wait.h>
> diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
> index 26f744188ad0..42574290d728 100644
> --- a/tools/testing/selftests/mm/mlock2-tests.c
> +++ b/tools/testing/selftests/mm/mlock2-tests.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sys/mman.h>
>   #include <stdint.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
> index 100370a7111d..d78bf686e99f 100644
> --- a/tools/testing/selftests/mm/mrelease_test.c
> +++ b/tools/testing/selftests/mm/mrelease_test.c
> @@ -2,7 +2,6 @@
>   /*
>    * Copyright 2022 Google LLC
>    */
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <stdbool.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
> index 1d75084b9ca5..934fa6b441b2 100644
> --- a/tools/testing/selftests/mm/mremap_dontunmap.c
> +++ b/tools/testing/selftests/mm/mremap_dontunmap.c
> @@ -5,7 +5,6 @@
>    *
>    * Copyright 2020, Brian Geffon <bgeffon@google.com>
>    */
> -#define _GNU_SOURCE
>   #include <sys/mman.h>
>   #include <linux/mman.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
> index 2f8b991f78cb..e057154630e0 100644
> --- a/tools/testing/selftests/mm/mremap_test.c
> +++ b/tools/testing/selftests/mm/mremap_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright 2020 Google LLC
>    */
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <stdlib.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
> index d59517ed3d48..2a18b5d276f0 100644
> --- a/tools/testing/selftests/mm/pagemap_ioctl.c
> +++ b/tools/testing/selftests/mm/pagemap_ioctl.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 1af3156a9db8..37d6b01ce90a 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -1,7 +1,6 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
>   #ifndef _PKEYS_HELPER_H
>   #define _PKEYS_HELPER_H
> -#define _GNU_SOURCE
>   #include <string.h>
>   #include <stdarg.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
> index 48dc151f8fca..9f7de92caeda 100644
> --- a/tools/testing/selftests/mm/protection_keys.c
> +++ b/tools/testing/selftests/mm/protection_keys.c
> @@ -21,7 +21,6 @@
>    *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>    *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>    */
> -#define _GNU_SOURCE
>   #define __SANE_USERSPACE_TYPES__
>   #include <errno.h>
>   #include <linux/elf.h>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index d3c7f5fb3e7b..ae6ac950d7a1 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -3,8 +3,6 @@
>    * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
>    * address range in a process via <debugfs>/split_huge_pages interface.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdarg.h>
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index ea7fd8fe2876..28a5c31bd791 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -12,8 +12,6 @@
>      ipcrm -m by hand, like this
>      sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
>      (warning this will remove all if someone else uses them) */
> -
> -#define _GNU_SOURCE 1
>   #include <sys/mman.h>
>   #include <stdlib.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
> index cc5629c3d2aa..abb44319264a 100644
> --- a/tools/testing/selftests/mm/uffd-common.h
> +++ b/tools/testing/selftests/mm/uffd-common.h
> @@ -7,7 +7,6 @@
>   #ifndef __UFFD_COMMON_H__
>   #define __UFFD_COMMON_H__
>   
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <errno.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index c6a8c732b802..d894417134b6 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <stdio.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> index bcf51d785a37..bd975670f61d 100644
> --- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> +++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <stdio.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
> index 79a3dd75590e..279d0c5f70d3 100644
> --- a/tools/testing/selftests/net/af_unix/diag_uid.c
> +++ b/tools/testing/selftests/net/af_unix/diag_uid.c
> @@ -1,7 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright Amazon.com Inc. or its affiliates. */
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> index 7e534594167e..2986b8cd0418 100644
> --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
> +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0 OR MIT
> -#define _GNU_SOURCE
>   #include <error.h>
>   #include <limits.h>
>   #include <stddef.h>
> diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
> index d799fd8f5c7c..34e816862cc7 100644
> --- a/tools/testing/selftests/net/af_unix/unix_connect.c
> +++ b/tools/testing/selftests/net/af_unix/unix_connect.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <stddef.h>
> diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
> index 90eb06fefa59..8262aa862331 100644
> --- a/tools/testing/selftests/net/csum.c
> +++ b/tools/testing/selftests/net/csum.c
> @@ -58,9 +58,6 @@
>    * different seed for each run (and logs this for reproducibility). It
>    * is advised to enable this for extra coverage in continuous testing.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/byteorder.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
> index 353e1e867fbb..f5d7032e6466 100644
> --- a/tools/testing/selftests/net/gro.c
> +++ b/tools/testing/selftests/net/gro.c
> @@ -34,9 +34,6 @@
>    * flakiness is to be expected.
>    *
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
> index f9ed749fd8c7..80c9e567a3d8 100644
> --- a/tools/testing/selftests/net/ip_defrag.c
> +++ b/tools/testing/selftests/net/ip_defrag.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
> index be4a30a0d02a..04aa06d26b09 100644
> --- a/tools/testing/selftests/net/ipsec.c
> +++ b/tools/testing/selftests/net/ipsec.c
> @@ -3,9 +3,6 @@
>    * ipsec.c - Check xfrm on veth inside a net-ns.
>    * Copyright (c) 2018 Dmitry Safonov
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/types.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
> index 708a9822259d..b7e0c3c02e20 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel.c
> @@ -1,8 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Test IPV6_FLOWINFO cmsg on send and recv */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/byteorder.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> index af95b48acea9..ebd219ba386e 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> @@ -1,8 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Test IPV6_FLOWINFO_MGR */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index d2043ec3bf6d..ea93030ed3ec 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <limits.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> index 218aac467321..c5bf873d76c2 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> index 926b0be87c99..7203ca9900e9 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
> index bdc03a2097e8..9278bf585c80 100644
> --- a/tools/testing/selftests/net/msg_zerocopy.c
> +++ b/tools/testing/selftests/net/msg_zerocopy.c
> @@ -24,9 +24,6 @@
>    * the kernel queues completions on the error queue for all zerocopy
>    * transfers.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
> index cd8a58097448..88e1d3b2ddf1 100644
> --- a/tools/testing/selftests/net/nettest.c
> +++ b/tools/testing/selftests/net/nettest.c
> @@ -3,8 +3,6 @@
>    *
>    * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
>    */
> -
> -#define _GNU_SOURCE
>   #include <features.h>
>   #include <sys/types.h>
>   #include <sys/ioctl.h>
> diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
> index 1a736f700be4..5b2d34440ae9 100644
> --- a/tools/testing/selftests/net/psock_fanout.c
> +++ b/tools/testing/selftests/net/psock_fanout.c
> @@ -26,9 +26,6 @@
>    * Todo:
>    * - functionality: PACKET_FANOUT_FLAG_DEFRAG
>    */
> -
> -#define _GNU_SOURCE		/* for sched_setaffinity */
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
> index edf1e6f80d41..2f29b513e18f 100644
> --- a/tools/testing/selftests/net/psock_snd.c
> +++ b/tools/testing/selftests/net/psock_snd.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
> index b8475cb29be7..9ee6ece52865 100644
> --- a/tools/testing/selftests/net/reuseport_addr_any.c
> +++ b/tools/testing/selftests/net/reuseport_addr_any.c
> @@ -3,9 +3,6 @@
>   /* Test that sockets listening on a specific address are preferred
>    * over sockets listening on addr_any.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> index 2d646174729f..e93e38cfb2a8 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> @@ -11,9 +11,6 @@
>    * This entire process is done for several different core id permutations
>    * and for each IPv4/IPv6 and TCP/UDP combination.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
> index c9ba36aa688e..502fdb9ce770 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_numa.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
> @@ -3,9 +3,6 @@
>    * Test functionality of BPF filters with SO_REUSEPORT. Same test as
>    * in reuseport_bpf_cpu, only as one socket per NUMA node.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
> index fb7a59ed759e..d3c3d3f39f8f 100644
> --- a/tools/testing/selftests/net/reuseport_dualstack.c
> +++ b/tools/testing/selftests/net/reuseport_dualstack.c
> @@ -10,9 +10,6 @@
>    * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
>    * AF_INET preference for v4 packets.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
> index e9fa14e10732..95bd0cdc3253 100644
> --- a/tools/testing/selftests/net/so_incoming_cpu.c
> +++ b/tools/testing/selftests/net/so_incoming_cpu.c
> @@ -1,6 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright Amazon.com Inc. or its affiliates. */
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
> index b39e87e967cd..18532d564f79 100644
> --- a/tools/testing/selftests/net/so_netns_cookie.c
> +++ b/tools/testing/selftests/net/so_netns_cookie.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
> index 8457b7ccbc09..011a24af9786 100644
> --- a/tools/testing/selftests/net/so_txtime.c
> +++ b/tools/testing/selftests/net/so_txtime.c
> @@ -9,9 +9,6 @@
>    * the expected stream. Sender will read transmit timestamps from the error
>    * queue. The streams can differ due to out-of-order delivery and drops.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
> index 247c3b3ac1c9..fa78b92d9740 100644
> --- a/tools/testing/selftests/net/tap.c
> +++ b/tools/testing/selftests/net/tap.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> index c1cb0c75156a..d30f89bb944c 100644
> --- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> +++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> @@ -12,7 +12,6 @@
>    * there are no cases in which a cookie is not accepted by verifying
>    * that TcpExtTCPFastOpenPassiveFail remains 0.
>    */
> -#define _GNU_SOURCE
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
> index bd6a9c7a3e8a..71ee145f151e 100644
> --- a/tools/testing/selftests/net/tcp_inq.c
> +++ b/tools/testing/selftests/net/tcp_inq.c
> @@ -5,8 +5,6 @@
>    *
>    * Simple example on how to use TCP_INQ and TCP_CM_INQ.
>    */
> -#define _GNU_SOURCE
> -
>   #include <error.h>
>   #include <netinet/in.h>
>   #include <netinet/tcp.h>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index 4fcce5150850..72d5f1207ee0 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -46,7 +46,6 @@
>    * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
>    *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
>    */
> -#define _GNU_SOURCE
>   #include <pthread.h>
>   #include <sys/types.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
> index f27a12d2a2c9..6dbad97d1d0a 100644
> --- a/tools/testing/selftests/net/tls.c
> +++ b/tools/testing/selftests/net/tls.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
> index 9ba03164d73a..e2d739892ce4 100644
> --- a/tools/testing/selftests/net/toeplitz.c
> +++ b/tools/testing/selftests/net/toeplitz.c
> @@ -20,9 +20,6 @@
>    * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
>    * 6. Compare the cpus from 4 and 5
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
> index fa83918b62d1..a64dcfb242c1 100644
> --- a/tools/testing/selftests/net/tun.c
> +++ b/tools/testing/selftests/net/tun.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
> index 7d9ea039450a..96972e0110a0 100644
> --- a/tools/testing/selftests/net/txring_overwrite.c
> +++ b/tools/testing/selftests/net/txring_overwrite.c
> @@ -4,9 +4,6 @@
>    * Verify that consecutive sends over packet tx_ring are mirrored
>    * with their original content intact.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <assert.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
> index ec60a16c9307..33dba9e90dea 100644
> --- a/tools/testing/selftests/net/txtimestamp.c
> +++ b/tools/testing/selftests/net/txtimestamp.c
> @@ -16,9 +16,6 @@
>    * This test requires a dummy TCP server.
>    * A simple `nc6 [-u] -l -p $DESTPORT` will do
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/types.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
> index 85b3baa3f7f3..9dc1026a033a 100644
> --- a/tools/testing/selftests/net/udpgso.c
> +++ b/tools/testing/selftests/net/udpgso.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <stddef.h>
>   #include <arpa/inet.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 1cbadd267c96..999df1236320 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
> index 477392715a9a..d7632993b354 100644
> --- a/tools/testing/selftests/net/udpgso_bench_tx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_tx.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
> index 5814611a1dc7..ef4d923f4759 100644
> --- a/tools/testing/selftests/perf_events/remove_on_exec.c
> +++ b/tools/testing/selftests/perf_events/remove_on_exec.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2021, Google LLC.
>    */
>   
> -#define _GNU_SOURCE
> -
>   /* We need the latest siginfo from the kernel repo. */
>   #include <sys/types.h>
>   #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
> index d1d8483ac628..14d1a3c8cb5c 100644
> --- a/tools/testing/selftests/perf_events/sigtrap_threads.c
> +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2021, Google LLC.
>    */
>   
> -#define _GNU_SOURCE
> -
>   /* We need the latest siginfo from the kernel repo. */
>   #include <sys/types.h>
>   #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
> index 7d84097ad45c..54dc8f16d92a 100644
> --- a/tools/testing/selftests/pid_namespace/regression_enomem.c
> +++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
> index 88d6830ee004..e33177b1aa41 100644
> --- a/tools/testing/selftests/pidfd/pidfd.h
> +++ b/tools/testing/selftests/pidfd/pidfd.h
> @@ -3,7 +3,6 @@
>   #ifndef __PIDFD_H
>   #define __PIDFD_H
>   
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 01cc37bf611c..67c9dc436c71 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> index cd51d547b751..b6a0e9b3d2f5 100644
> --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..781a3931fb5a 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..a40fb27a78bb 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <poll.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> index 6e2f2cd400ca..49d7a78cc4fe 100644
> --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index c081ae91313a..c3d52406b8fd 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
> index 0dcb8365ddc3..54beba0983f1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_wait.c
> +++ b/tools/testing/selftests/pidfd/pidfd_wait.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/sched.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
> index 5297b10d25c3..054a78ebe8b5 100644
> --- a/tools/testing/selftests/ptrace/get_set_sud.c
> +++ b/tools/testing/selftests/ptrace/get_set_sud.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include "../kselftest_harness.h"
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
> index a6884f66dc01..1b7b77190f72 100644
> --- a/tools/testing/selftests/ptrace/peeksiginfo.c
> +++ b/tools/testing/selftests/ptrace/peeksiginfo.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <signal.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> index 2348d2c20d0a..5961c24ee1ae 100644
> --- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> +++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <pthread.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
> index 295eea16466f..1fed749b4bd7 100644
> --- a/tools/testing/selftests/rseq/basic_test.c
> +++ b/tools/testing/selftests/rseq/basic_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Basic test coverage for critical regions and rseq_current_cpu().
>    */
> -
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <sched.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
> index 2f37961240ca..48a55d94eb72 100644
> --- a/tools/testing/selftests/rseq/param_test.c
> +++ b/tools/testing/selftests/rseq/param_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <linux/membarrier.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
> index 96e812bdf8a4..88602889414c 100644
> --- a/tools/testing/selftests/rseq/rseq.c
> +++ b/tools/testing/selftests/rseq/rseq.c
> @@ -14,8 +14,6 @@
>    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>    * Lesser General Public License for more details.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <sched.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> index b83099160fbc..3632a4890da9 100644
> --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
> +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> @@ -2,7 +2,6 @@
>    * Strictly speaking, this is not a test. But it can report during test
>    * runs so relative performace can be measured.
>    */
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <err.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 783ebce8c4de..972ccc12553e 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -4,8 +4,6 @@
>    *
>    * Test code for seccomp bpf.
>    */
> -
> -#define _GNU_SOURCE
>   #include <sys/types.h>
>   
>   /*
> diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
> index 7288a05136ba..a1f156dbbd56 100644
> --- a/tools/testing/selftests/user_events/abi_test.c
> +++ b/tools/testing/selftests/user_events/abi_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
> index d884fd69dd51..9441635fc452 100644
> --- a/tools/testing/selftests/x86/amx.c
> +++ b/tools/testing/selftests/x86/amx.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <errno.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
> index 3bc95f3ed585..0129cdae8abe 100644
> --- a/tools/testing/selftests/x86/check_initial_reg_state.c
> +++ b/tools/testing/selftests/x86/check_initial_reg_state.c
> @@ -3,9 +3,6 @@
>    * check_initial_reg_state.c - check that execve sets the correct state
>    * Copyright (c) 2014-2016 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   
>   unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
> diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
> index cf9ce8fbb656..d2c746149678 100644
> --- a/tools/testing/selftests/x86/corrupt_xstate_header.c
> +++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
> @@ -4,9 +4,6 @@
>    *
>    * Based on analysis and a test case from Thomas Gleixner.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
> index d1e919b0c1dc..9fa9d4a847ac 100644
> --- a/tools/testing/selftests/x86/entry_from_vm86.c
> +++ b/tools/testing/selftests/x86/entry_from_vm86.c
> @@ -5,9 +5,6 @@
>    *
>    * This exercises a few paths that need to special-case vm86 mode.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <stdlib.h>
>   #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
> index 8c780cce941d..348134d2cefc 100644
> --- a/tools/testing/selftests/x86/fsgsbase.c
> +++ b/tools/testing/selftests/x86/fsgsbase.c
> @@ -3,8 +3,6 @@
>    * fsgsbase.c, an fsgsbase test
>    * Copyright (c) 2014-2016 Andy Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
> index 6fffadc51579..88dce47ab8e6 100644
> --- a/tools/testing/selftests/x86/fsgsbase_restore.c
> +++ b/tools/testing/selftests/x86/fsgsbase_restore.c
> @@ -12,8 +12,6 @@
>    *
>    * This is not part of fsgsbase.c, because that test is 64-bit only.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
> index 57ec5e99edb9..07b7c10f8d39 100644
> --- a/tools/testing/selftests/x86/ioperm.c
> +++ b/tools/testing/selftests/x86/ioperm.c
> @@ -3,8 +3,6 @@
>    * ioperm.c - Test case for ioperm(2)
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
> index 7e3e09c1abac..baa691154905 100644
> --- a/tools/testing/selftests/x86/iopl.c
> +++ b/tools/testing/selftests/x86/iopl.c
> @@ -3,8 +3,6 @@
>    * iopl.c - Test case for a Linux on Xen 64-bit bug
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
> index 215b8150b7cc..39edfd7f6037 100644
> --- a/tools/testing/selftests/x86/lam.c
> +++ b/tools/testing/selftests/x86/lam.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
> index 3a29346e1452..3b4237a85a12 100644
> --- a/tools/testing/selftests/x86/ldt_gdt.c
> +++ b/tools/testing/selftests/x86/ldt_gdt.c
> @@ -3,8 +3,6 @@
>    * ldt_gdt.c - Test cases for LDT and GDT access
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
> index cc3de6ff9fba..47ecc63220b7 100644
> --- a/tools/testing/selftests/x86/mov_ss_trap.c
> +++ b/tools/testing/selftests/x86/mov_ss_trap.c
> @@ -19,8 +19,6 @@
>    *
>    * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
>    */
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <sys/ptrace.h>
>   #include <sys/types.h>
> diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
> index ea4a4e246879..97c5b34096cc 100644
> --- a/tools/testing/selftests/x86/nx_stack.c
> +++ b/tools/testing/selftests/x86/nx_stack.c
> @@ -23,8 +23,6 @@
>    * Regular stack is completely overwritten before testing.
>    * Test doesn't exit SIGSEGV handler after first fault at INT3.
>    */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE
>   #undef NDEBUG
>   #include <assert.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
> index 12aaa063196e..bdc81c8bd1a7 100644
> --- a/tools/testing/selftests/x86/ptrace_syscall.c
> +++ b/tools/testing/selftests/x86/ptrace_syscall.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <sys/ptrace.h>
>   #include <sys/types.h>
>   #include <sys/wait.h>
> diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
> index f689af75e979..7f41c3a4268b 100644
> --- a/tools/testing/selftests/x86/sigaltstack.c
> +++ b/tools/testing/selftests/x86/sigaltstack.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -
> -#define _GNU_SOURCE
>   #include <signal.h>
>   #include <stdio.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
> index 5d7961a5f7f6..2054f729b2c2 100644
> --- a/tools/testing/selftests/x86/sigreturn.c
> +++ b/tools/testing/selftests/x86/sigreturn.c
> @@ -24,9 +24,6 @@
>    *
>    * Do not run on outdated, unpatched kernels at risk of nasty crashes.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/time.h>
>   #include <time.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
> index 9a30f443e928..375f3b50a0b5 100644
> --- a/tools/testing/selftests/x86/single_step_syscall.c
> +++ b/tools/testing/selftests/x86/single_step_syscall.c
> @@ -9,9 +9,6 @@
>    * immediately issues #DB from CPL 0.  This requires special handling in
>    * the kernel.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/time.h>
>   #include <time.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
> index 461fa41a4d02..10eee1bcd015 100644
> --- a/tools/testing/selftests/x86/syscall_arg_fault.c
> +++ b/tools/testing/selftests/x86/syscall_arg_fault.c
> @@ -3,9 +3,6 @@
>    * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
> index 991591718bb0..c72fc8aaa4d3 100644
> --- a/tools/testing/selftests/x86/syscall_numbering.c
> +++ b/tools/testing/selftests/x86/syscall_numbering.c
> @@ -5,9 +5,6 @@
>    *
>    * Copyright (c) 2018 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
> index 84d74be1d902..24bc219358a5 100644
> --- a/tools/testing/selftests/x86/sysret_rip.c
> +++ b/tools/testing/selftests/x86/sysret_rip.c
> @@ -3,9 +3,6 @@
>    * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
>    * Copyright (c) 2014-2016 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
> index 5f3d4fca440f..f8b9e0b2a0c5 100644
> --- a/tools/testing/selftests/x86/sysret_ss_attrs.c
> +++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
> @@ -7,9 +7,6 @@
>    * the hidden attributes set to an unusable state.  Make sure the kernel
>    * doesn't let this happen.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
> index 6b5036fbb735..0c9431ba7d31 100644
> --- a/tools/testing/selftests/x86/test_FCMOV.c
> +++ b/tools/testing/selftests/x86/test_FCMOV.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
> index aec6692c6dcf..ba186665918d 100644
> --- a/tools/testing/selftests/x86/test_FCOMI.c
> +++ b/tools/testing/selftests/x86/test_FCOMI.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
> index 09789c0ce3e9..95580cdaaa32 100644
> --- a/tools/testing/selftests/x86/test_FISTTP.c
> +++ b/tools/testing/selftests/x86/test_FISTTP.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
> index f0d876d48277..a8bdba356682 100644
> --- a/tools/testing/selftests/x86/test_mremap_vdso.c
> +++ b/tools/testing/selftests/x86/test_mremap_vdso.c
> @@ -9,7 +9,6 @@
>    * Can be built statically:
>    * gcc -Os -Wall -static -m32 test_mremap_vdso.c
>    */
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <errno.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 757e6527f67e..0ceca9064cec 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -7,9 +7,6 @@
>    * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
>    * stick to the basics and hope the compiler doesn't do anything strange.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/syscall.h>
>   #include <asm/mman.h>
>   #include <sys/mman.h>
> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>    * Can be built statically:
>    * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>    */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
> index 47cab972807c..cbf4e5012005 100644
> --- a/tools/testing/selftests/x86/test_vsyscall.c
> +++ b/tools/testing/selftests/x86/test_vsyscall.c
> @@ -1,7 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <sys/time.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
> index 4c311e1af4c7..754f5d4d425a 100644
> --- a/tools/testing/selftests/x86/unwind_vdso.c
> +++ b/tools/testing/selftests/x86/unwind_vdso.c
> @@ -5,9 +5,6 @@
>    *
>    * This tests __kernel_vsyscall's unwind info.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <features.h>
>   #include <stdio.h>
>   
> diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
> index fe99f2434155..8193de22a390 100644
> --- a/tools/testing/selftests/x86/vdso_restorer.c
> +++ b/tools/testing/selftests/x86/vdso_restorer.c
> @@ -10,9 +10,6 @@
>    * 64-bit userspace has never supported sa_restorer == NULL, so this is
>    * 32-bit only.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <err.h>
>   #include <stdio.h>
>   #include <dlfcn.h>

Re: [PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---

Very nice.

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

thanks,
-- 
John Hubbard
NVIDIA

>   tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>   tools/testing/selftests/capabilities/test_execve.c            | 2 --
>   tools/testing/selftests/clone3/clone3.c                       | 2 --
>   .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>   tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>   tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>   tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>   tools/testing/selftests/core/close_range_test.c               | 2 --
>   tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>   tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>   tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>   tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>   tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>   tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>   tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>   tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>   tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>   .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>   tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>   tools/testing/selftests/ipc/msgque.c                          | 1 -
>   tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>   tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>   tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>   tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>   tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>   tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>   tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>   tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>   tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>   tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>   tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>   tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>   tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>   tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>   tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>   tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>   tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>   tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>   tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>   tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>   tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>   .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>   tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>   tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>   tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>   tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>   tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>   tools/testing/selftests/kvm/steal_time.c                      | 1 -
>   tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>   .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>   tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>   tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>   tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>   .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>   tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>   .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>   tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>   tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>   tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>   tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>   tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>   .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>   tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>   tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>   tools/testing/selftests/landlock/base_test.c                  | 2 --
>   tools/testing/selftests/landlock/fs_test.c                    | 2 --
>   tools/testing/selftests/landlock/net_test.c                   | 2 --
>   tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>   tools/testing/selftests/lsm/common.c                          | 2 --
>   tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>   tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>   tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>   tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>   .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>   .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>   tools/testing/selftests/memfd/common.c                        | 1 -
>   tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>   tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>   tools/testing/selftests/mm/cow.c                              | 1 -
>   tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>   tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>   tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>   tools/testing/selftests/mm/khugepaged.c                       | 1 -
>   tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>   tools/testing/selftests/mm/madv_populate.c                    | 1 -
>   tools/testing/selftests/mm/map_populate.c                     | 2 --
>   tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>   tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>   tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>   tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>   tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>   tools/testing/selftests/mm/mremap_test.c                      | 2 --
>   tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>   tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>   tools/testing/selftests/mm/protection_keys.c                  | 1 -
>   tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>   tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>   tools/testing/selftests/mm/uffd-common.h                      | 1 -
>   tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>   .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>   tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>   tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>   tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>   tools/testing/selftests/net/csum.c                            | 3 ---
>   tools/testing/selftests/net/gro.c                             | 3 ---
>   tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>   tools/testing/selftests/net/ipsec.c                           | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>   tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>   tools/testing/selftests/net/nettest.c                         | 2 --
>   tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>   tools/testing/selftests/net/psock_snd.c                       | 3 ---
>   tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>   tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>   tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>   tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>   tools/testing/selftests/net/so_txtime.c                       | 3 ---
>   tools/testing/selftests/net/tap.c                             | 3 ---
>   tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>   tools/testing/selftests/net/tcp_inq.c                         | 2 --
>   tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>   tools/testing/selftests/net/tls.c                             | 3 ---
>   tools/testing/selftests/net/toeplitz.c                        | 3 ---
>   tools/testing/selftests/net/tun.c                             | 3 ---
>   tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>   tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>   tools/testing/selftests/net/udpgso.c                          | 3 ---
>   tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>   tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>   tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>   tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>   tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>   tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>   tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>   tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>   tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>   tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>   tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>   tools/testing/selftests/rseq/basic_test.c                     | 2 --
>   tools/testing/selftests/rseq/param_test.c                     | 1 -
>   tools/testing/selftests/rseq/rseq.c                           | 2 --
>   tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>   tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>   tools/testing/selftests/user_events/abi_test.c                | 2 --
>   tools/testing/selftests/x86/amx.c                             | 2 --
>   tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>   tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>   tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>   tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>   tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>   tools/testing/selftests/x86/ioperm.c                          | 2 --
>   tools/testing/selftests/x86/iopl.c                            | 2 --
>   tools/testing/selftests/x86/lam.c                             | 1 -
>   tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>   tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>   tools/testing/selftests/x86/nx_stack.c                        | 2 --
>   tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>   tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>   tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>   tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>   tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>   tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>   tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>   tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>   tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>   tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>   tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>   tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>   tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>   tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>   tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>   tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>   tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>   198 files changed, 405 deletions(-)
> 
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index b171fd53b004..c1a6ce7b0912 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdbool.h>
>   #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
> index 7cde07a5df78..e3954b88c3ee 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <cap-ng.h>
>   #include <linux/capability.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 3c9bf0cd82a8..3c5e45dae617 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -1,8 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   
>   /* Based on Christian Brauner's clone3() example */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <inttypes.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> index 31b56d625655..bb99ea20f7d5 100644
> --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> @@ -7,8 +7,6 @@
>    */
>   
>   /* capabilities related code based on selftests/bpf/test_verifier.c */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <linux/sched.h>
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 54a8b2445be9..50336d56db6b 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <sched.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
> index 3d2663fe50ba..172e19d5515f 100644
> --- a/tools/testing/selftests/clone3/clone3_selftests.h
> +++ b/tools/testing/selftests/clone3/clone3_selftests.h
> @@ -3,7 +3,6 @@
>   #ifndef _CLONE3_SELFTESTS_H
>   #define _CLONE3_SELFTESTS_H
>   
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <linux/sched.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index ed785afb6077..8b5ed4484ee6 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -5,8 +5,6 @@
>    * These tests are assuming to be running in the host's
>    * PID namespace.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <linux/sched.h>
> diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
> index c59e4adb905d..1c2902bcc913 100644
> --- a/tools/testing/selftests/core/close_range_test.c
> +++ b/tools/testing/selftests/core/close_range_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> index c812080e304e..7c8dbab8ac44 100644
> --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> +++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> index e0319417124d..6b411859c2cd 100644
> --- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <sys/stat.h>
>   #include <sys/types.h>
> diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> index 5f362c0fd890..fca693db1b09 100644
> --- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
> index b1fc9b916ace..73766447eeb0 100644
> --- a/tools/testing/selftests/filesystems/devpts_pts.c
> +++ b/tools/testing/selftests/filesystems/devpts_pts.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
> index c0a9b2d3302d..05367a70b963 100644
> --- a/tools/testing/selftests/filesystems/dnotify_test.c
> +++ b/tools/testing/selftests/filesystems/dnotify_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE	/* needed to get the defines */
>   #include <fcntl.h>	/* in glibc 2.2 this has the needed
>   				   values defined */
>   #include <signal.h>
> diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> index 65ede506305c..9bc2ddad7e92 100644
> --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <asm/unistd.h>
>   #include <linux/time_types.h>
>   #include <poll.h>
> diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> index f142a137526c..17935f42fbc9 100644
> --- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> +++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <asm/unistd.h>
> diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> index e488ad354fce..56cf3ad8640d 100644
> --- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
> +++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> @@ -6,8 +6,6 @@
>    * Copyright 2022 Red Hat Inc.
>    * Author: Javier Martinez Canillas <javierm@redhat.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> index 759f86e7d263..b58a80bde95a 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> +++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <inttypes.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> index 3eafd7da58e2..d1cefd1b7d16 100644
> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <stdint.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> index 7f3ca5c78df1..8e41f9fe784c 100644
> --- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> +++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> @@ -16,9 +16,6 @@
>    *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
>    *
>    *****************************************************************************/
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <limits.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..291c81d59a9d 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 25110c7c0b3e..885c9e943cee 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> index 4eaba83cdcf3..5369959e9fc2 100644
> --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
> +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright (c) 2021, Google LLC.
>    */
> -#define _GNU_SOURCE
> -
>   #include "arch_timer.h"
>   #include "delay.h"
>   #include "gic.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> index 5972905275cf..79e99f47a9fe 100644
> --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> @@ -7,7 +7,6 @@
>    * hugetlbfs with a hole). It checks that the expected handling method is
>    * called (e.g., uffd faults with the right address and write/read flag).
>    */
> -#define _GNU_SOURCE
>   #include <linux/bitmap.h>
>   #include <fcntl.h>
>   #include <test_util.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> index 9b004905d1d3..1c8c6f0c1ca3 100644
> --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> @@ -10,9 +10,6 @@
>    *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
>    *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <linux/psci.h>
>   
>   #include "kvm_util.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index ca917c71ff60..b3b5fb0ff0a9 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE
>   #include <linux/kernel.h>
>   #include <sys/syscall.h>
>   #include <asm/kvm.h>
> diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
> index ae1f1a6d8312..fcebd8d81ce4 100644
> --- a/tools/testing/selftests/kvm/arch_timer.c
> +++ b/tools/testing/selftests/kvm/arch_timer.c
> @@ -19,9 +19,6 @@
>    *
>    * Copyright (c) 2021, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <pthread.h>
>   #include <linux/sizes.h>
> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
> index bf3609f71854..0c4d3b6afbf8 100644
> --- a/tools/testing/selftests/kvm/demand_paging_test.c
> +++ b/tools/testing/selftests/kvm/demand_paging_test.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019, Google, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
> index eaad5b20854c..bf1ebc29f22a 100644
> --- a/tools/testing/selftests/kvm/dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/dirty_log_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Red Hat, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index 92eae206baa6..309fe84b84ad 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Author: Chao Peng <chao.p.peng@linux.intel.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
> index decc521fc760..bce73bcb973c 100644
> --- a/tools/testing/selftests/kvm/hardware_disable_test.c
> +++ b/tools/testing/selftests/kvm/hardware_disable_test.c
> @@ -4,9 +4,6 @@
>    * kvm_arch_hardware_disable is called and it attempts to unregister the user
>    * return notifiers.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <fcntl.h>
>   #include <pthread.h>
>   #include <semaphore.h>
> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> index 877449c34592..a9d97c213584 100644
> --- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -5,9 +5,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019-2022 Google LLC
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <time.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> index 698c1cfa3111..f02355c3c4c2 100644
> --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> @@ -6,8 +6,6 @@
>    *
>    * Test the fd-based interface for KVM statistics.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> index b9e23265e4b3..c78f34699f73 100644
> --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> @@ -6,8 +6,6 @@
>    *
>    * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
> index e0ba97ac1c56..7759c685086b 100644
> --- a/tools/testing/selftests/kvm/kvm_page_table_test.c
> +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
> @@ -8,9 +8,6 @@
>    * page size have been pre-allocated on your system, if you are planning to
>    * use hugepages to back the guest memory for testing.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
> index 2bd25b191d15..b49690658c60 100644
> --- a/tools/testing/selftests/kvm/lib/assert.c
> +++ b/tools/testing/selftests/kvm/lib/assert.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
> -
>   #include "test_util.h"
>   
>   #include <execinfo.h>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index b2262b5fad9e..1eaf001d0ad4 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (C) 2018, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
>   #include "test_util.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
> index cf2c73971308..555e3932e529 100644
> --- a/tools/testing/selftests/kvm/lib/memstress.c
> +++ b/tools/testing/selftests/kvm/lib/memstress.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2020, Google LLC.
>    */
> -#define _GNU_SOURCE
> -
>   #include <inttypes.h>
>   #include <linux/bitmap.h>
>   
> diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
> index 5a8f8becb129..8ed0b74ae837 100644
> --- a/tools/testing/selftests/kvm/lib/test_util.c
> +++ b/tools/testing/selftests/kvm/lib/test_util.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (C) 2020, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdarg.h>
>   #include <assert.h>
> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> index f4eef6eb2dc2..bd07568a5240 100644
> --- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019-2022 Google LLC
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> index e248d3364b9c..e83809febae1 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <stdint.h>
>   #include <stdbool.h>
>   
> diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
> index 1a6da7389bf1..0b9678858b6d 100644
> --- a/tools/testing/selftests/kvm/max_guest_memory_test.c
> +++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> index 156361966612..05fcf902e067 100644
> --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2020, Google, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..4b5004ef9c6b 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -7,9 +7,6 @@
>    *
>    * Copyright (c) 2024, Intel Corporation.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include "arch_timer.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
> index 28f97fb52044..b3536400f9ac 100644
> --- a/tools/testing/selftests/kvm/rseq_test.c
> +++ b/tools/testing/selftests/kvm/rseq_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
> index 626a2b8a2037..84ba79c42ab1 100644
> --- a/tools/testing/selftests/kvm/s390x/cmma_test.c
> +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
> @@ -7,8 +7,6 @@
>    * Authors:
>    *  Nico Boehr <nrb@linux.ibm.com>
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> index 43fb25ddc3ec..53def355ccba 100644
> --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> @@ -10,8 +10,6 @@
>    *
>    * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index bd57d991e27d..214ff84f6fdb 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <pthread.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
> index bae0c5026f82..e9231387c589 100644
> --- a/tools/testing/selftests/kvm/steal_time.c
> +++ b/tools/testing/selftests/kvm/steal_time.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <time.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
> index eae521f050e0..8e5713e36d4b 100644
> --- a/tools/testing/selftests/kvm/x86_64/amx_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
> @@ -6,8 +6,6 @@
>    *
>    * Tests for amx #NM exception and save/restore.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> index 6c2e5e0ceb1f..9c21b6bccc38 100644
> --- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "flds_emulation.h"
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> index df351ae17029..10b1b0ba374e 100644
> --- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2023, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> index 5c27efbf405e..4f5881d4ef66 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> @@ -7,8 +7,6 @@
>    * This work is licensed under the terms of the GNU GPL, version 2.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> index 4c7257ecd2a6..4f3f3a9b038b 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for Enlightened VMCS, including nested guest state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> index f1617762c22f..8206f5ef42dd 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2022, Red Hat, Inc.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <pthread.h>
>   #include <inttypes.h>
>   
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> index c9b18707edc0..b987a3d79715 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for Hyper-V extensions to SVM.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> index 05b56095cf76..077cd0ec3040 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2022, Red Hat, Inc.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <asm/barrier.h>
>   #include <pthread.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> index 3670331adf21..3eb0313ffa39 100644
> --- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "test_util.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> index 17bbb96fc4df..e7efb2b35f8b 100644
> --- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> @@ -5,9 +5,6 @@
>    *
>    * Copyright (C) 2022, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <fcntl.h>
>   #include <stdint.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> index 87011965dc41..2165b1ad8b38 100644
> --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> @@ -9,8 +9,6 @@
>    * Verifies expected behavior of controlling guest access to
>    * MSR_PLATFORM_INFO.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 26c85815f7e9..77f14138594e 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2023, Tencent, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <x86intrin.h>
>   
>   #include "pmu.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index 3c85d1ae9893..5ce53b8c46e0 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -9,9 +9,6 @@
>    * Verifies the expected behavior of allow lists and deny lists for
>    * virtual PMU events.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "kvm_util.h"
>   #include "pmu.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> index e0f642d2a3c4..82a8d88b5338 100644
> --- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> @@ -2,7 +2,6 @@
>   /*
>    * Copyright (C) 2022, Google LLC.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <limits.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> index 366cf18600bc..d691d86e5bc3 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE /* for program_invocation_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> index 3610981d9162..c021c0795a96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> @@ -10,7 +10,6 @@
>    * That bug allowed a user-mode program that called the KVM_SET_SREGS
>    * ioctl to put a VCPU's local APIC into an invalid state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> index 416207c38a17..362be40fc00d 100644
> --- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> @@ -5,9 +5,6 @@
>    * Test that KVM emulates instructions in response to EPT violations when
>    * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "flds_emulation.h"
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
> index e18b86666e1f..55c88d664a94 100644
> --- a/tools/testing/selftests/kvm/x86_64/smm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for SMM.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
> index 88b58aab7207..1c756db329e5 100644
> --- a/tools/testing/selftests/kvm/x86_64/state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/state_test.c
> @@ -6,7 +6,6 @@
>    *
>    * Tests for vCPU state save/restore, including nested guest state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> index adb5593daf48..8fa3948b0170 100644
> --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> @@ -8,8 +8,6 @@
>    * including requesting an invalid register set, updates to/from values
>    * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> index dcbb3c29fb8e..abe71946941f 100644
> --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> @@ -17,8 +17,6 @@
>    * delivered into the guest or not.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <pthread.h>
>   #include <inttypes.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> index f4f61a2d2464..53afbea4df88 100644
> --- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Tests for exiting into userspace on registered MSRs
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "kvm_test_harness.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> index 977948fd52e6..fa512d033205 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Red Hat, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> index ea0cb3cae0f7..3b93f262b797 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> @@ -10,7 +10,6 @@
>    * and check it can be retrieved with KVM_GET_MSR, also test
>    * the invalid LBR formats are rejected.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> index affc32800158..00dd2ac07a61 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> @@ -9,7 +9,6 @@
>    * value instead of partially decayed timer value
>    *
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> index 725c206ba0b9..c78e5f755116 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> @@ -19,8 +19,6 @@
>    * Migration is a command line option. When used on non-numa machines will
>    * exit with error. Test is still usefull on non-numa for testing IPIs.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <getopt.h>
>   #include <pthread.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> index ab75b873a4ad..69849acd95b0 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> index 167c97abff1b..f331a4e9bae3 100644
> --- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Tests for the IA32_XSS MSR.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index a6f89aaea77d..bdb3955a9452 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>    * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>    * Copyright © 2019-2020 ANSSI
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 9a6036fbf289..acec1c82c8b4 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>    * Copyright © 2020 ANSSI
>    * Copyright © 2020-2022 Microsoft Corporation
>    */
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <linux/landlock.h>
>   #include <linux/magic.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>    * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
>    * Copyright © 2023 Microsoft Corporation
>    */
> -
> -#define _GNU_SOURCE
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>    * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>    * Copyright © 2019-2020 ANSSI
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
> index 9ad258912646..1b18aac570f1 100644
> --- a/tools/testing/selftests/lsm/common.c
> +++ b/tools/testing/selftests/lsm/common.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright © 2023 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> index df215e4aa63f..7465bde3f922 100644
> --- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> index 06d24d4679a6..a6b44e25c21f 100644
> --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
> +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <string.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> index 66dec47e3ca3..110c6a07e74c 100644
> --- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <string.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> index af89855adb7b..a8a60b6271a5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
> +++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> @@ -1,5 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index a9cc17facfb3..b4651e2ade00 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index 4cdc8b1d124c..17ae5199b916 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
> index 8eb3d75f6e60..879d4f4c66fa 100644
> --- a/tools/testing/selftests/memfd/common.c
> +++ b/tools/testing/selftests/memfd/common.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
> index 93798c8c5d54..15bc189bf831 100644
> --- a/tools/testing/selftests/memfd/fuse_test.c
> +++ b/tools/testing/selftests/memfd/fuse_test.c
> @@ -12,8 +12,6 @@
>    * the read() syscall with our memory-mapped memfd object as receive buffer to
>    * force the kernel to write into our memfd object.
>    */
> -
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index 18f585684e20..5172c27a8748 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 363bf5f801be..6f1a36d51f19 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
> index ad168d35b23b..3bfd5a630081 100644
> --- a/tools/testing/selftests/mm/gup_longterm.c
> +++ b/tools/testing/selftests/mm/gup_longterm.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
> index 267eea2e0e0b..edb46888222f 100644
> --- a/tools/testing/selftests/mm/hugepage-mmap.c
> +++ b/tools/testing/selftests/mm/hugepage-mmap.c
> @@ -16,7 +16,6 @@
>    * range.
>    * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
> index c463d1c09c9b..8e22822bb754 100644
> --- a/tools/testing/selftests/mm/hugepage-mremap.c
> +++ b/tools/testing/selftests/mm/hugepage-mremap.c
> @@ -11,8 +11,6 @@
>    * To make sure the test triggers pmd sharing and goes through the 'unshare'
>    * path in the mremap code use 1GB (1024) or more.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index e74107185324..70c40c67bc5d 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -11,8 +11,6 @@
>    * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
>    * directory.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> index ba6cc6f9cabc..6b8b41b4f754 100644
> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
> index 829320a519e7..d18bf400dae6 100644
> --- a/tools/testing/selftests/mm/khugepaged.c
> +++ b/tools/testing/selftests/mm/khugepaged.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>   #include <ctype.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
> index d615767e396b..1deae905c42e 100644
> --- a/tools/testing/selftests/mm/ksm_functional_tests.c
> +++ b/tools/testing/selftests/mm/ksm_functional_tests.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
> index 17bcb07f19f3..d19ad13ffd7e 100644
> --- a/tools/testing/selftests/mm/madv_populate.c
> +++ b/tools/testing/selftests/mm/madv_populate.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
> index 5c8a53869b1b..ff4d4079bd0e 100644
> --- a/tools/testing/selftests/mm/map_populate.c
> +++ b/tools/testing/selftests/mm/map_populate.c
> @@ -4,8 +4,6 @@
>    *
>    * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sys/mman.h>
> diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
> index 1e01d3ddc11c..200bedcdc32e 100644
> --- a/tools/testing/selftests/mm/mdwe_test.c
> +++ b/tools/testing/selftests/mm/mdwe_test.c
> @@ -7,7 +7,6 @@
>   #include <linux/mman.h>
>   #include <linux/prctl.h>
>   
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <sys/auxv.h>
> diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
> index 9b298f6a04b3..750adede2816 100644
> --- a/tools/testing/selftests/mm/memfd_secret.c
> +++ b/tools/testing/selftests/mm/memfd_secret.c
> @@ -4,8 +4,6 @@
>    *
>    * Author: Mike Rapoport <rppt@linux.ibm.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <sys/uio.h>
>   #include <sys/mman.h>
>   #include <sys/wait.h>
> diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
> index 26f744188ad0..42574290d728 100644
> --- a/tools/testing/selftests/mm/mlock2-tests.c
> +++ b/tools/testing/selftests/mm/mlock2-tests.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sys/mman.h>
>   #include <stdint.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
> index 100370a7111d..d78bf686e99f 100644
> --- a/tools/testing/selftests/mm/mrelease_test.c
> +++ b/tools/testing/selftests/mm/mrelease_test.c
> @@ -2,7 +2,6 @@
>   /*
>    * Copyright 2022 Google LLC
>    */
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <stdbool.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
> index 1d75084b9ca5..934fa6b441b2 100644
> --- a/tools/testing/selftests/mm/mremap_dontunmap.c
> +++ b/tools/testing/selftests/mm/mremap_dontunmap.c
> @@ -5,7 +5,6 @@
>    *
>    * Copyright 2020, Brian Geffon <bgeffon@google.com>
>    */
> -#define _GNU_SOURCE
>   #include <sys/mman.h>
>   #include <linux/mman.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
> index 2f8b991f78cb..e057154630e0 100644
> --- a/tools/testing/selftests/mm/mremap_test.c
> +++ b/tools/testing/selftests/mm/mremap_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright 2020 Google LLC
>    */
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <stdlib.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
> index d59517ed3d48..2a18b5d276f0 100644
> --- a/tools/testing/selftests/mm/pagemap_ioctl.c
> +++ b/tools/testing/selftests/mm/pagemap_ioctl.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 1af3156a9db8..37d6b01ce90a 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -1,7 +1,6 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
>   #ifndef _PKEYS_HELPER_H
>   #define _PKEYS_HELPER_H
> -#define _GNU_SOURCE
>   #include <string.h>
>   #include <stdarg.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
> index 48dc151f8fca..9f7de92caeda 100644
> --- a/tools/testing/selftests/mm/protection_keys.c
> +++ b/tools/testing/selftests/mm/protection_keys.c
> @@ -21,7 +21,6 @@
>    *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>    *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>    */
> -#define _GNU_SOURCE
>   #define __SANE_USERSPACE_TYPES__
>   #include <errno.h>
>   #include <linux/elf.h>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index d3c7f5fb3e7b..ae6ac950d7a1 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -3,8 +3,6 @@
>    * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
>    * address range in a process via <debugfs>/split_huge_pages interface.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdarg.h>
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index ea7fd8fe2876..28a5c31bd791 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -12,8 +12,6 @@
>      ipcrm -m by hand, like this
>      sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
>      (warning this will remove all if someone else uses them) */
> -
> -#define _GNU_SOURCE 1
>   #include <sys/mman.h>
>   #include <stdlib.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
> index cc5629c3d2aa..abb44319264a 100644
> --- a/tools/testing/selftests/mm/uffd-common.h
> +++ b/tools/testing/selftests/mm/uffd-common.h
> @@ -7,7 +7,6 @@
>   #ifndef __UFFD_COMMON_H__
>   #define __UFFD_COMMON_H__
>   
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <errno.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index c6a8c732b802..d894417134b6 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <stdio.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> index bcf51d785a37..bd975670f61d 100644
> --- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> +++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <stdio.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
> index 79a3dd75590e..279d0c5f70d3 100644
> --- a/tools/testing/selftests/net/af_unix/diag_uid.c
> +++ b/tools/testing/selftests/net/af_unix/diag_uid.c
> @@ -1,7 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright Amazon.com Inc. or its affiliates. */
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> index 7e534594167e..2986b8cd0418 100644
> --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
> +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0 OR MIT
> -#define _GNU_SOURCE
>   #include <error.h>
>   #include <limits.h>
>   #include <stddef.h>
> diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
> index d799fd8f5c7c..34e816862cc7 100644
> --- a/tools/testing/selftests/net/af_unix/unix_connect.c
> +++ b/tools/testing/selftests/net/af_unix/unix_connect.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <stddef.h>
> diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
> index 90eb06fefa59..8262aa862331 100644
> --- a/tools/testing/selftests/net/csum.c
> +++ b/tools/testing/selftests/net/csum.c
> @@ -58,9 +58,6 @@
>    * different seed for each run (and logs this for reproducibility). It
>    * is advised to enable this for extra coverage in continuous testing.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/byteorder.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
> index 353e1e867fbb..f5d7032e6466 100644
> --- a/tools/testing/selftests/net/gro.c
> +++ b/tools/testing/selftests/net/gro.c
> @@ -34,9 +34,6 @@
>    * flakiness is to be expected.
>    *
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
> index f9ed749fd8c7..80c9e567a3d8 100644
> --- a/tools/testing/selftests/net/ip_defrag.c
> +++ b/tools/testing/selftests/net/ip_defrag.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
> index be4a30a0d02a..04aa06d26b09 100644
> --- a/tools/testing/selftests/net/ipsec.c
> +++ b/tools/testing/selftests/net/ipsec.c
> @@ -3,9 +3,6 @@
>    * ipsec.c - Check xfrm on veth inside a net-ns.
>    * Copyright (c) 2018 Dmitry Safonov
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/types.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
> index 708a9822259d..b7e0c3c02e20 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel.c
> @@ -1,8 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Test IPV6_FLOWINFO cmsg on send and recv */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/byteorder.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> index af95b48acea9..ebd219ba386e 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> @@ -1,8 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Test IPV6_FLOWINFO_MGR */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index d2043ec3bf6d..ea93030ed3ec 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <limits.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> index 218aac467321..c5bf873d76c2 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> index 926b0be87c99..7203ca9900e9 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
> index bdc03a2097e8..9278bf585c80 100644
> --- a/tools/testing/selftests/net/msg_zerocopy.c
> +++ b/tools/testing/selftests/net/msg_zerocopy.c
> @@ -24,9 +24,6 @@
>    * the kernel queues completions on the error queue for all zerocopy
>    * transfers.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
> index cd8a58097448..88e1d3b2ddf1 100644
> --- a/tools/testing/selftests/net/nettest.c
> +++ b/tools/testing/selftests/net/nettest.c
> @@ -3,8 +3,6 @@
>    *
>    * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
>    */
> -
> -#define _GNU_SOURCE
>   #include <features.h>
>   #include <sys/types.h>
>   #include <sys/ioctl.h>
> diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
> index 1a736f700be4..5b2d34440ae9 100644
> --- a/tools/testing/selftests/net/psock_fanout.c
> +++ b/tools/testing/selftests/net/psock_fanout.c
> @@ -26,9 +26,6 @@
>    * Todo:
>    * - functionality: PACKET_FANOUT_FLAG_DEFRAG
>    */
> -
> -#define _GNU_SOURCE		/* for sched_setaffinity */
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
> index edf1e6f80d41..2f29b513e18f 100644
> --- a/tools/testing/selftests/net/psock_snd.c
> +++ b/tools/testing/selftests/net/psock_snd.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
> index b8475cb29be7..9ee6ece52865 100644
> --- a/tools/testing/selftests/net/reuseport_addr_any.c
> +++ b/tools/testing/selftests/net/reuseport_addr_any.c
> @@ -3,9 +3,6 @@
>   /* Test that sockets listening on a specific address are preferred
>    * over sockets listening on addr_any.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> index 2d646174729f..e93e38cfb2a8 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> @@ -11,9 +11,6 @@
>    * This entire process is done for several different core id permutations
>    * and for each IPv4/IPv6 and TCP/UDP combination.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
> index c9ba36aa688e..502fdb9ce770 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_numa.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
> @@ -3,9 +3,6 @@
>    * Test functionality of BPF filters with SO_REUSEPORT. Same test as
>    * in reuseport_bpf_cpu, only as one socket per NUMA node.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
> index fb7a59ed759e..d3c3d3f39f8f 100644
> --- a/tools/testing/selftests/net/reuseport_dualstack.c
> +++ b/tools/testing/selftests/net/reuseport_dualstack.c
> @@ -10,9 +10,6 @@
>    * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
>    * AF_INET preference for v4 packets.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
> index e9fa14e10732..95bd0cdc3253 100644
> --- a/tools/testing/selftests/net/so_incoming_cpu.c
> +++ b/tools/testing/selftests/net/so_incoming_cpu.c
> @@ -1,6 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright Amazon.com Inc. or its affiliates. */
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
> index b39e87e967cd..18532d564f79 100644
> --- a/tools/testing/selftests/net/so_netns_cookie.c
> +++ b/tools/testing/selftests/net/so_netns_cookie.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
> index 8457b7ccbc09..011a24af9786 100644
> --- a/tools/testing/selftests/net/so_txtime.c
> +++ b/tools/testing/selftests/net/so_txtime.c
> @@ -9,9 +9,6 @@
>    * the expected stream. Sender will read transmit timestamps from the error
>    * queue. The streams can differ due to out-of-order delivery and drops.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
> index 247c3b3ac1c9..fa78b92d9740 100644
> --- a/tools/testing/selftests/net/tap.c
> +++ b/tools/testing/selftests/net/tap.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> index c1cb0c75156a..d30f89bb944c 100644
> --- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> +++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> @@ -12,7 +12,6 @@
>    * there are no cases in which a cookie is not accepted by verifying
>    * that TcpExtTCPFastOpenPassiveFail remains 0.
>    */
> -#define _GNU_SOURCE
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
> index bd6a9c7a3e8a..71ee145f151e 100644
> --- a/tools/testing/selftests/net/tcp_inq.c
> +++ b/tools/testing/selftests/net/tcp_inq.c
> @@ -5,8 +5,6 @@
>    *
>    * Simple example on how to use TCP_INQ and TCP_CM_INQ.
>    */
> -#define _GNU_SOURCE
> -
>   #include <error.h>
>   #include <netinet/in.h>
>   #include <netinet/tcp.h>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index 4fcce5150850..72d5f1207ee0 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -46,7 +46,6 @@
>    * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
>    *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
>    */
> -#define _GNU_SOURCE
>   #include <pthread.h>
>   #include <sys/types.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
> index f27a12d2a2c9..6dbad97d1d0a 100644
> --- a/tools/testing/selftests/net/tls.c
> +++ b/tools/testing/selftests/net/tls.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
> index 9ba03164d73a..e2d739892ce4 100644
> --- a/tools/testing/selftests/net/toeplitz.c
> +++ b/tools/testing/selftests/net/toeplitz.c
> @@ -20,9 +20,6 @@
>    * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
>    * 6. Compare the cpus from 4 and 5
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
> index fa83918b62d1..a64dcfb242c1 100644
> --- a/tools/testing/selftests/net/tun.c
> +++ b/tools/testing/selftests/net/tun.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
> index 7d9ea039450a..96972e0110a0 100644
> --- a/tools/testing/selftests/net/txring_overwrite.c
> +++ b/tools/testing/selftests/net/txring_overwrite.c
> @@ -4,9 +4,6 @@
>    * Verify that consecutive sends over packet tx_ring are mirrored
>    * with their original content intact.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <assert.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
> index ec60a16c9307..33dba9e90dea 100644
> --- a/tools/testing/selftests/net/txtimestamp.c
> +++ b/tools/testing/selftests/net/txtimestamp.c
> @@ -16,9 +16,6 @@
>    * This test requires a dummy TCP server.
>    * A simple `nc6 [-u] -l -p $DESTPORT` will do
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/types.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
> index 85b3baa3f7f3..9dc1026a033a 100644
> --- a/tools/testing/selftests/net/udpgso.c
> +++ b/tools/testing/selftests/net/udpgso.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <stddef.h>
>   #include <arpa/inet.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 1cbadd267c96..999df1236320 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
> index 477392715a9a..d7632993b354 100644
> --- a/tools/testing/selftests/net/udpgso_bench_tx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_tx.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
> index 5814611a1dc7..ef4d923f4759 100644
> --- a/tools/testing/selftests/perf_events/remove_on_exec.c
> +++ b/tools/testing/selftests/perf_events/remove_on_exec.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2021, Google LLC.
>    */
>   
> -#define _GNU_SOURCE
> -
>   /* We need the latest siginfo from the kernel repo. */
>   #include <sys/types.h>
>   #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
> index d1d8483ac628..14d1a3c8cb5c 100644
> --- a/tools/testing/selftests/perf_events/sigtrap_threads.c
> +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2021, Google LLC.
>    */
>   
> -#define _GNU_SOURCE
> -
>   /* We need the latest siginfo from the kernel repo. */
>   #include <sys/types.h>
>   #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
> index 7d84097ad45c..54dc8f16d92a 100644
> --- a/tools/testing/selftests/pid_namespace/regression_enomem.c
> +++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
> index 88d6830ee004..e33177b1aa41 100644
> --- a/tools/testing/selftests/pidfd/pidfd.h
> +++ b/tools/testing/selftests/pidfd/pidfd.h
> @@ -3,7 +3,6 @@
>   #ifndef __PIDFD_H
>   #define __PIDFD_H
>   
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 01cc37bf611c..67c9dc436c71 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> index cd51d547b751..b6a0e9b3d2f5 100644
> --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..781a3931fb5a 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..a40fb27a78bb 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <poll.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> index 6e2f2cd400ca..49d7a78cc4fe 100644
> --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index c081ae91313a..c3d52406b8fd 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
> index 0dcb8365ddc3..54beba0983f1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_wait.c
> +++ b/tools/testing/selftests/pidfd/pidfd_wait.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/sched.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
> index 5297b10d25c3..054a78ebe8b5 100644
> --- a/tools/testing/selftests/ptrace/get_set_sud.c
> +++ b/tools/testing/selftests/ptrace/get_set_sud.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include "../kselftest_harness.h"
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
> index a6884f66dc01..1b7b77190f72 100644
> --- a/tools/testing/selftests/ptrace/peeksiginfo.c
> +++ b/tools/testing/selftests/ptrace/peeksiginfo.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <signal.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> index 2348d2c20d0a..5961c24ee1ae 100644
> --- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> +++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <pthread.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
> index 295eea16466f..1fed749b4bd7 100644
> --- a/tools/testing/selftests/rseq/basic_test.c
> +++ b/tools/testing/selftests/rseq/basic_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Basic test coverage for critical regions and rseq_current_cpu().
>    */
> -
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <sched.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
> index 2f37961240ca..48a55d94eb72 100644
> --- a/tools/testing/selftests/rseq/param_test.c
> +++ b/tools/testing/selftests/rseq/param_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <linux/membarrier.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
> index 96e812bdf8a4..88602889414c 100644
> --- a/tools/testing/selftests/rseq/rseq.c
> +++ b/tools/testing/selftests/rseq/rseq.c
> @@ -14,8 +14,6 @@
>    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>    * Lesser General Public License for more details.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <sched.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> index b83099160fbc..3632a4890da9 100644
> --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
> +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> @@ -2,7 +2,6 @@
>    * Strictly speaking, this is not a test. But it can report during test
>    * runs so relative performace can be measured.
>    */
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <err.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 783ebce8c4de..972ccc12553e 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -4,8 +4,6 @@
>    *
>    * Test code for seccomp bpf.
>    */
> -
> -#define _GNU_SOURCE
>   #include <sys/types.h>
>   
>   /*
> diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
> index 7288a05136ba..a1f156dbbd56 100644
> --- a/tools/testing/selftests/user_events/abi_test.c
> +++ b/tools/testing/selftests/user_events/abi_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
> index d884fd69dd51..9441635fc452 100644
> --- a/tools/testing/selftests/x86/amx.c
> +++ b/tools/testing/selftests/x86/amx.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <errno.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
> index 3bc95f3ed585..0129cdae8abe 100644
> --- a/tools/testing/selftests/x86/check_initial_reg_state.c
> +++ b/tools/testing/selftests/x86/check_initial_reg_state.c
> @@ -3,9 +3,6 @@
>    * check_initial_reg_state.c - check that execve sets the correct state
>    * Copyright (c) 2014-2016 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   
>   unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
> diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
> index cf9ce8fbb656..d2c746149678 100644
> --- a/tools/testing/selftests/x86/corrupt_xstate_header.c
> +++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
> @@ -4,9 +4,6 @@
>    *
>    * Based on analysis and a test case from Thomas Gleixner.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
> index d1e919b0c1dc..9fa9d4a847ac 100644
> --- a/tools/testing/selftests/x86/entry_from_vm86.c
> +++ b/tools/testing/selftests/x86/entry_from_vm86.c
> @@ -5,9 +5,6 @@
>    *
>    * This exercises a few paths that need to special-case vm86 mode.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <stdlib.h>
>   #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
> index 8c780cce941d..348134d2cefc 100644
> --- a/tools/testing/selftests/x86/fsgsbase.c
> +++ b/tools/testing/selftests/x86/fsgsbase.c
> @@ -3,8 +3,6 @@
>    * fsgsbase.c, an fsgsbase test
>    * Copyright (c) 2014-2016 Andy Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
> index 6fffadc51579..88dce47ab8e6 100644
> --- a/tools/testing/selftests/x86/fsgsbase_restore.c
> +++ b/tools/testing/selftests/x86/fsgsbase_restore.c
> @@ -12,8 +12,6 @@
>    *
>    * This is not part of fsgsbase.c, because that test is 64-bit only.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
> index 57ec5e99edb9..07b7c10f8d39 100644
> --- a/tools/testing/selftests/x86/ioperm.c
> +++ b/tools/testing/selftests/x86/ioperm.c
> @@ -3,8 +3,6 @@
>    * ioperm.c - Test case for ioperm(2)
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
> index 7e3e09c1abac..baa691154905 100644
> --- a/tools/testing/selftests/x86/iopl.c
> +++ b/tools/testing/selftests/x86/iopl.c
> @@ -3,8 +3,6 @@
>    * iopl.c - Test case for a Linux on Xen 64-bit bug
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
> index 215b8150b7cc..39edfd7f6037 100644
> --- a/tools/testing/selftests/x86/lam.c
> +++ b/tools/testing/selftests/x86/lam.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
> index 3a29346e1452..3b4237a85a12 100644
> --- a/tools/testing/selftests/x86/ldt_gdt.c
> +++ b/tools/testing/selftests/x86/ldt_gdt.c
> @@ -3,8 +3,6 @@
>    * ldt_gdt.c - Test cases for LDT and GDT access
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
> index cc3de6ff9fba..47ecc63220b7 100644
> --- a/tools/testing/selftests/x86/mov_ss_trap.c
> +++ b/tools/testing/selftests/x86/mov_ss_trap.c
> @@ -19,8 +19,6 @@
>    *
>    * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
>    */
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <sys/ptrace.h>
>   #include <sys/types.h>
> diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
> index ea4a4e246879..97c5b34096cc 100644
> --- a/tools/testing/selftests/x86/nx_stack.c
> +++ b/tools/testing/selftests/x86/nx_stack.c
> @@ -23,8 +23,6 @@
>    * Regular stack is completely overwritten before testing.
>    * Test doesn't exit SIGSEGV handler after first fault at INT3.
>    */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE
>   #undef NDEBUG
>   #include <assert.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
> index 12aaa063196e..bdc81c8bd1a7 100644
> --- a/tools/testing/selftests/x86/ptrace_syscall.c
> +++ b/tools/testing/selftests/x86/ptrace_syscall.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <sys/ptrace.h>
>   #include <sys/types.h>
>   #include <sys/wait.h>
> diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
> index f689af75e979..7f41c3a4268b 100644
> --- a/tools/testing/selftests/x86/sigaltstack.c
> +++ b/tools/testing/selftests/x86/sigaltstack.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -
> -#define _GNU_SOURCE
>   #include <signal.h>
>   #include <stdio.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
> index 5d7961a5f7f6..2054f729b2c2 100644
> --- a/tools/testing/selftests/x86/sigreturn.c
> +++ b/tools/testing/selftests/x86/sigreturn.c
> @@ -24,9 +24,6 @@
>    *
>    * Do not run on outdated, unpatched kernels at risk of nasty crashes.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/time.h>
>   #include <time.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
> index 9a30f443e928..375f3b50a0b5 100644
> --- a/tools/testing/selftests/x86/single_step_syscall.c
> +++ b/tools/testing/selftests/x86/single_step_syscall.c
> @@ -9,9 +9,6 @@
>    * immediately issues #DB from CPL 0.  This requires special handling in
>    * the kernel.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/time.h>
>   #include <time.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
> index 461fa41a4d02..10eee1bcd015 100644
> --- a/tools/testing/selftests/x86/syscall_arg_fault.c
> +++ b/tools/testing/selftests/x86/syscall_arg_fault.c
> @@ -3,9 +3,6 @@
>    * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
> index 991591718bb0..c72fc8aaa4d3 100644
> --- a/tools/testing/selftests/x86/syscall_numbering.c
> +++ b/tools/testing/selftests/x86/syscall_numbering.c
> @@ -5,9 +5,6 @@
>    *
>    * Copyright (c) 2018 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
> index 84d74be1d902..24bc219358a5 100644
> --- a/tools/testing/selftests/x86/sysret_rip.c
> +++ b/tools/testing/selftests/x86/sysret_rip.c
> @@ -3,9 +3,6 @@
>    * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
>    * Copyright (c) 2014-2016 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
> index 5f3d4fca440f..f8b9e0b2a0c5 100644
> --- a/tools/testing/selftests/x86/sysret_ss_attrs.c
> +++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
> @@ -7,9 +7,6 @@
>    * the hidden attributes set to an unusable state.  Make sure the kernel
>    * doesn't let this happen.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
> index 6b5036fbb735..0c9431ba7d31 100644
> --- a/tools/testing/selftests/x86/test_FCMOV.c
> +++ b/tools/testing/selftests/x86/test_FCMOV.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
> index aec6692c6dcf..ba186665918d 100644
> --- a/tools/testing/selftests/x86/test_FCOMI.c
> +++ b/tools/testing/selftests/x86/test_FCOMI.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
> index 09789c0ce3e9..95580cdaaa32 100644
> --- a/tools/testing/selftests/x86/test_FISTTP.c
> +++ b/tools/testing/selftests/x86/test_FISTTP.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
> index f0d876d48277..a8bdba356682 100644
> --- a/tools/testing/selftests/x86/test_mremap_vdso.c
> +++ b/tools/testing/selftests/x86/test_mremap_vdso.c
> @@ -9,7 +9,6 @@
>    * Can be built statically:
>    * gcc -Os -Wall -static -m32 test_mremap_vdso.c
>    */
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <errno.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 757e6527f67e..0ceca9064cec 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -7,9 +7,6 @@
>    * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
>    * stick to the basics and hope the compiler doesn't do anything strange.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/syscall.h>
>   #include <asm/mman.h>
>   #include <sys/mman.h>
> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>    * Can be built statically:
>    * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>    */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
> index 47cab972807c..cbf4e5012005 100644
> --- a/tools/testing/selftests/x86/test_vsyscall.c
> +++ b/tools/testing/selftests/x86/test_vsyscall.c
> @@ -1,7 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <sys/time.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
> index 4c311e1af4c7..754f5d4d425a 100644
> --- a/tools/testing/selftests/x86/unwind_vdso.c
> +++ b/tools/testing/selftests/x86/unwind_vdso.c
> @@ -5,9 +5,6 @@
>    *
>    * This tests __kernel_vsyscall's unwind info.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <features.h>
>   #include <stdio.h>
>   
> diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
> index fe99f2434155..8193de22a390 100644
> --- a/tools/testing/selftests/x86/vdso_restorer.c
> +++ b/tools/testing/selftests/x86/vdso_restorer.c
> @@ -10,9 +10,6 @@
>    * 64-bit userspace has never supported sa_restorer == NULL, so this is
>    * 32-bit only.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <err.h>
>   #include <stdio.h>
>   #include <dlfcn.h>



_______________________________________________
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linux-riscv@lists.infradead.org
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[PATCH v2 4/5] selftests: Drop define _GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> _GNU_SOURCE is provided by KHDR_INCLUDES, so it should be dropped to
> prevent _GNU_SOURCE redefined warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---

Very nice.

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

thanks,
-- 
John Hubbard
NVIDIA

>   tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>   tools/testing/selftests/capabilities/test_execve.c            | 2 --
>   tools/testing/selftests/clone3/clone3.c                       | 2 --
>   .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>   tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>   tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>   tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>   tools/testing/selftests/core/close_range_test.c               | 2 --
>   tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>   tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>   tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>   tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>   tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>   tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>   tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>   tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>   tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>   .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>   tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>   tools/testing/selftests/ipc/msgque.c                          | 1 -
>   tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>   tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>   tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>   tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>   tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>   tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>   tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>   tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>   tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>   tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>   tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>   tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>   tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>   tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>   tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>   tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>   tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>   tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>   tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>   tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>   tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>   .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>   tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>   tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>   tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>   tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>   tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>   tools/testing/selftests/kvm/steal_time.c                      | 1 -
>   tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>   .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>   tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>   tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>   tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>   .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>   tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>   .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>   tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>   tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>   tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>   tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>   tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>   .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>   tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>   tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>   tools/testing/selftests/landlock/base_test.c                  | 2 --
>   tools/testing/selftests/landlock/fs_test.c                    | 2 --
>   tools/testing/selftests/landlock/net_test.c                   | 2 --
>   tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>   tools/testing/selftests/lsm/common.c                          | 2 --
>   tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>   tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>   tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>   tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>   .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>   .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>   tools/testing/selftests/memfd/common.c                        | 1 -
>   tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>   tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>   tools/testing/selftests/mm/cow.c                              | 1 -
>   tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>   tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>   tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>   tools/testing/selftests/mm/khugepaged.c                       | 1 -
>   tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>   tools/testing/selftests/mm/madv_populate.c                    | 1 -
>   tools/testing/selftests/mm/map_populate.c                     | 2 --
>   tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>   tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>   tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>   tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>   tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>   tools/testing/selftests/mm/mremap_test.c                      | 2 --
>   tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>   tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>   tools/testing/selftests/mm/protection_keys.c                  | 1 -
>   tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>   tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>   tools/testing/selftests/mm/uffd-common.h                      | 1 -
>   tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>   .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>   tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>   tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>   tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>   tools/testing/selftests/net/csum.c                            | 3 ---
>   tools/testing/selftests/net/gro.c                             | 3 ---
>   tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>   tools/testing/selftests/net/ipsec.c                           | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>   tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>   tools/testing/selftests/net/nettest.c                         | 2 --
>   tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>   tools/testing/selftests/net/psock_snd.c                       | 3 ---
>   tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>   tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>   tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>   tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>   tools/testing/selftests/net/so_txtime.c                       | 3 ---
>   tools/testing/selftests/net/tap.c                             | 3 ---
>   tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>   tools/testing/selftests/net/tcp_inq.c                         | 2 --
>   tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>   tools/testing/selftests/net/tls.c                             | 3 ---
>   tools/testing/selftests/net/toeplitz.c                        | 3 ---
>   tools/testing/selftests/net/tun.c                             | 3 ---
>   tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>   tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>   tools/testing/selftests/net/udpgso.c                          | 3 ---
>   tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>   tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>   tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>   tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>   tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>   tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>   tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>   tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>   tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>   tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>   tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>   tools/testing/selftests/rseq/basic_test.c                     | 2 --
>   tools/testing/selftests/rseq/param_test.c                     | 1 -
>   tools/testing/selftests/rseq/rseq.c                           | 2 --
>   tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>   tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>   tools/testing/selftests/user_events/abi_test.c                | 2 --
>   tools/testing/selftests/x86/amx.c                             | 2 --
>   tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>   tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>   tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>   tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>   tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>   tools/testing/selftests/x86/ioperm.c                          | 2 --
>   tools/testing/selftests/x86/iopl.c                            | 2 --
>   tools/testing/selftests/x86/lam.c                             | 1 -
>   tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>   tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>   tools/testing/selftests/x86/nx_stack.c                        | 2 --
>   tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>   tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>   tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>   tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>   tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>   tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>   tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>   tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>   tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>   tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>   tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>   tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>   tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>   tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>   tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>   tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>   tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>   198 files changed, 405 deletions(-)
> 
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index b171fd53b004..c1a6ce7b0912 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdbool.h>
>   #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
> index 7cde07a5df78..e3954b88c3ee 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <cap-ng.h>
>   #include <linux/capability.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 3c9bf0cd82a8..3c5e45dae617 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -1,8 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   
>   /* Based on Christian Brauner's clone3() example */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <inttypes.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> index 31b56d625655..bb99ea20f7d5 100644
> --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
> @@ -7,8 +7,6 @@
>    */
>   
>   /* capabilities related code based on selftests/bpf/test_verifier.c */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <linux/sched.h>
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 54a8b2445be9..50336d56db6b 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <sched.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/clone3/clone3_selftests.h b/tools/testing/selftests/clone3/clone3_selftests.h
> index 3d2663fe50ba..172e19d5515f 100644
> --- a/tools/testing/selftests/clone3/clone3_selftests.h
> +++ b/tools/testing/selftests/clone3/clone3_selftests.h
> @@ -3,7 +3,6 @@
>   #ifndef _CLONE3_SELFTESTS_H
>   #define _CLONE3_SELFTESTS_H
>   
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <linux/sched.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index ed785afb6077..8b5ed4484ee6 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -5,8 +5,6 @@
>    * These tests are assuming to be running in the host's
>    * PID namespace.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <linux/sched.h>
> diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
> index c59e4adb905d..1c2902bcc913 100644
> --- a/tools/testing/selftests/core/close_range_test.c
> +++ b/tools/testing/selftests/core/close_range_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/kernel.h>
> diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> index c812080e304e..7c8dbab8ac44 100644
> --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> +++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> index e0319417124d..6b411859c2cd 100644
> --- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <sys/stat.h>
>   #include <sys/types.h>
> diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> index 5f362c0fd890..fca693db1b09 100644
> --- a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
> index b1fc9b916ace..73766447eeb0 100644
> --- a/tools/testing/selftests/filesystems/devpts_pts.c
> +++ b/tools/testing/selftests/filesystems/devpts_pts.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
> index c0a9b2d3302d..05367a70b963 100644
> --- a/tools/testing/selftests/filesystems/dnotify_test.c
> +++ b/tools/testing/selftests/filesystems/dnotify_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE	/* needed to get the defines */
>   #include <fcntl.h>	/* in glibc 2.2 this has the needed
>   				   values defined */
>   #include <signal.h>
> diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> index 65ede506305c..9bc2ddad7e92 100644
> --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <asm/unistd.h>
>   #include <linux/time_types.h>
>   #include <poll.h>
> diff --git a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> index f142a137526c..17935f42fbc9 100644
> --- a/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> +++ b/tools/testing/selftests/filesystems/eventfd/eventfd_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <asm/unistd.h>
> diff --git a/tools/testing/selftests/filesystems/fat/rename_exchange.c b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> index e488ad354fce..56cf3ad8640d 100644
> --- a/tools/testing/selftests/filesystems/fat/rename_exchange.c
> +++ b/tools/testing/selftests/filesystems/fat/rename_exchange.c
> @@ -6,8 +6,6 @@
>    * Copyright 2022 Red Hat Inc.
>    * Author: Javier Martinez Canillas <javierm@redhat.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> index 759f86e7d263..b58a80bde95a 100644
> --- a/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> +++ b/tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <inttypes.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> index 3eafd7da58e2..d1cefd1b7d16 100644
> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <stdint.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/futex/functional/futex_requeue_pi.c b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> index 7f3ca5c78df1..8e41f9fe784c 100644
> --- a/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> +++ b/tools/testing/selftests/futex/functional/futex_requeue_pi.c
> @@ -16,9 +16,6 @@
>    *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
>    *
>    *****************************************************************************/
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <limits.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..291c81d59a9d 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 25110c7c0b3e..885c9e943cee 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> index 4eaba83cdcf3..5369959e9fc2 100644
> --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
> +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright (c) 2021, Google LLC.
>    */
> -#define _GNU_SOURCE
> -
>   #include "arch_timer.h"
>   #include "delay.h"
>   #include "gic.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> index 5972905275cf..79e99f47a9fe 100644
> --- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
> @@ -7,7 +7,6 @@
>    * hugetlbfs with a hole). It checks that the expected handling method is
>    * called (e.g., uffd faults with the right address and write/read flag).
>    */
> -#define _GNU_SOURCE
>   #include <linux/bitmap.h>
>   #include <fcntl.h>
>   #include <test_util.h>
> diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> index 9b004905d1d3..1c8c6f0c1ca3 100644
> --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> @@ -10,9 +10,6 @@
>    *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
>    *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <linux/psci.h>
>   
>   #include "kvm_util.h"
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index ca917c71ff60..b3b5fb0ff0a9 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE
>   #include <linux/kernel.h>
>   #include <sys/syscall.h>
>   #include <asm/kvm.h>
> diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c
> index ae1f1a6d8312..fcebd8d81ce4 100644
> --- a/tools/testing/selftests/kvm/arch_timer.c
> +++ b/tools/testing/selftests/kvm/arch_timer.c
> @@ -19,9 +19,6 @@
>    *
>    * Copyright (c) 2021, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <pthread.h>
>   #include <linux/sizes.h>
> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
> index bf3609f71854..0c4d3b6afbf8 100644
> --- a/tools/testing/selftests/kvm/demand_paging_test.c
> +++ b/tools/testing/selftests/kvm/demand_paging_test.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019, Google, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
> index eaad5b20854c..bf1ebc29f22a 100644
> --- a/tools/testing/selftests/kvm/dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/dirty_log_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Red Hat, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index 92eae206baa6..309fe84b84ad 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Author: Chao Peng <chao.p.peng@linux.intel.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c
> index decc521fc760..bce73bcb973c 100644
> --- a/tools/testing/selftests/kvm/hardware_disable_test.c
> +++ b/tools/testing/selftests/kvm/hardware_disable_test.c
> @@ -4,9 +4,6 @@
>    * kvm_arch_hardware_disable is called and it attempts to unregister the user
>    * return notifiers.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <fcntl.h>
>   #include <pthread.h>
>   #include <semaphore.h>
> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> index 877449c34592..a9d97c213584 100644
> --- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -5,9 +5,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019-2022 Google LLC
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <time.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> index 698c1cfa3111..f02355c3c4c2 100644
> --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
> @@ -6,8 +6,6 @@
>    *
>    * Test the fd-based interface for KVM statistics.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> index b9e23265e4b3..c78f34699f73 100644
> --- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> +++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
> @@ -6,8 +6,6 @@
>    *
>    * Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
> index e0ba97ac1c56..7759c685086b 100644
> --- a/tools/testing/selftests/kvm/kvm_page_table_test.c
> +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
> @@ -8,9 +8,6 @@
>    * page size have been pre-allocated on your system, if you are planning to
>    * use hugepages to back the guest memory for testing.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
> index 2bd25b191d15..b49690658c60 100644
> --- a/tools/testing/selftests/kvm/lib/assert.c
> +++ b/tools/testing/selftests/kvm/lib/assert.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for getline(3) and strchrnul(3)*/
> -
>   #include "test_util.h"
>   
>   #include <execinfo.h>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index b2262b5fad9e..1eaf001d0ad4 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (C) 2018, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
>   #include "test_util.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
> index cf2c73971308..555e3932e529 100644
> --- a/tools/testing/selftests/kvm/lib/memstress.c
> +++ b/tools/testing/selftests/kvm/lib/memstress.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2020, Google LLC.
>    */
> -#define _GNU_SOURCE
> -
>   #include <inttypes.h>
>   #include <linux/bitmap.h>
>   
> diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
> index 5a8f8becb129..8ed0b74ae837 100644
> --- a/tools/testing/selftests/kvm/lib/test_util.c
> +++ b/tools/testing/selftests/kvm/lib/test_util.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (C) 2020, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdarg.h>
>   #include <assert.h>
> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> index f4eef6eb2dc2..bd07568a5240 100644
> --- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2019-2022 Google LLC
>    */
> -
> -#define _GNU_SOURCE /* for pipe2 */
> -
>   #include <inttypes.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> index e248d3364b9c..e83809febae1 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <stdint.h>
>   #include <stdbool.h>
>   
> diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
> index 1a6da7389bf1..0b9678858b6d 100644
> --- a/tools/testing/selftests/kvm/max_guest_memory_test.c
> +++ b/tools/testing/selftests/kvm/max_guest_memory_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> index 156361966612..05fcf902e067 100644
> --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
> @@ -6,9 +6,6 @@
>    * Copyright (C) 2018, Red Hat, Inc.
>    * Copyright (C) 2020, Google, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..4b5004ef9c6b 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -7,9 +7,6 @@
>    *
>    * Copyright (c) 2024, Intel Corporation.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include "arch_timer.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
> index 28f97fb52044..b3536400f9ac 100644
> --- a/tools/testing/selftests/kvm/rseq_test.c
> +++ b/tools/testing/selftests/kvm/rseq_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c
> index 626a2b8a2037..84ba79c42ab1 100644
> --- a/tools/testing/selftests/kvm/s390x/cmma_test.c
> +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c
> @@ -7,8 +7,6 @@
>    * Authors:
>    *  Nico Boehr <nrb@linux.ibm.com>
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> index 43fb25ddc3ec..53def355ccba 100644
> --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
> @@ -10,8 +10,6 @@
>    *
>    * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index bd57d991e27d..214ff84f6fdb 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <pthread.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
> index bae0c5026f82..e9231387c589 100644
> --- a/tools/testing/selftests/kvm/steal_time.c
> +++ b/tools/testing/selftests/kvm/steal_time.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <time.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
> index eae521f050e0..8e5713e36d4b 100644
> --- a/tools/testing/selftests/kvm/x86_64/amx_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
> @@ -6,8 +6,6 @@
>    *
>    * Tests for amx #NM exception and save/restore.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> index 6c2e5e0ceb1f..9c21b6bccc38 100644
> --- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "flds_emulation.h"
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> index df351ae17029..10b1b0ba374e 100644
> --- a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2023, Google LLC.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> index 5c27efbf405e..4f5881d4ef66 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
> @@ -7,8 +7,6 @@
>    * This work is licensed under the terms of the GNU GPL, version 2.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> index 4c7257ecd2a6..4f3f3a9b038b 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for Enlightened VMCS, including nested guest state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> index f1617762c22f..8206f5ef42dd 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2022, Red Hat, Inc.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <pthread.h>
>   #include <inttypes.h>
>   
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> index c9b18707edc0..b987a3d79715 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for Hyper-V extensions to SVM.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> index 05b56095cf76..077cd0ec3040 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2022, Red Hat, Inc.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <asm/barrier.h>
>   #include <pthread.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> index 3670331adf21..3eb0313ffa39 100644
> --- a/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "test_util.h"
>   #include "kvm_util.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> index 17bbb96fc4df..e7efb2b35f8b 100644
> --- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
> @@ -5,9 +5,6 @@
>    *
>    * Copyright (C) 2022, Google LLC.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <fcntl.h>
>   #include <stdint.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> index 87011965dc41..2165b1ad8b38 100644
> --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c
> @@ -9,8 +9,6 @@
>    * Verifies expected behavior of controlling guest access to
>    * MSR_PLATFORM_INFO.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> index 26c85815f7e9..77f14138594e 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright (C) 2023, Tencent, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <x86intrin.h>
>   
>   #include "pmu.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index 3c85d1ae9893..5ce53b8c46e0 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -9,9 +9,6 @@
>    * Verifies the expected behavior of allow lists and deny lists for
>    * virtual PMU events.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "kvm_util.h"
>   #include "pmu.h"
>   #include "processor.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> index e0f642d2a3c4..82a8d88b5338 100644
> --- a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.c
> @@ -2,7 +2,6 @@
>   /*
>    * Copyright (C) 2022, Google LLC.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <limits.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> index 366cf18600bc..d691d86e5bc3 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c
> @@ -4,7 +4,6 @@
>    *
>    * Copyright (C) 2020, Red Hat, Inc.
>    */
> -#define _GNU_SOURCE /* for program_invocation_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> index 3610981d9162..c021c0795a96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/set_sregs_test.c
> @@ -10,7 +10,6 @@
>    * That bug allowed a user-mode program that called the KVM_SET_SREGS
>    * ioctl to put a VCPU's local APIC into an invalid state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> index 416207c38a17..362be40fc00d 100644
> --- a/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
> @@ -5,9 +5,6 @@
>    * Test that KVM emulates instructions in response to EPT violations when
>    * allow_smaller_maxphyaddr is enabled and guest.MAXPHYADDR < host.MAXPHYADDR.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
> -
>   #include "flds_emulation.h"
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
> index e18b86666e1f..55c88d664a94 100644
> --- a/tools/testing/selftests/kvm/x86_64/smm_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
> @@ -4,7 +4,6 @@
>    *
>    * Tests for SMM.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
> index 88b58aab7207..1c756db329e5 100644
> --- a/tools/testing/selftests/kvm/x86_64/state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/state_test.c
> @@ -6,7 +6,6 @@
>    *
>    * Tests for vCPU state save/restore, including nested guest state.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> index adb5593daf48..8fa3948b0170 100644
> --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c
> @@ -8,8 +8,6 @@
>    * including requesting an invalid register set, updates to/from values
>    * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> index dcbb3c29fb8e..abe71946941f 100644
> --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c
> @@ -17,8 +17,6 @@
>    * delivered into the guest or not.
>    *
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <pthread.h>
>   #include <inttypes.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> index f4f61a2d2464..53afbea4df88 100644
> --- a/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Tests for exiting into userspace on registered MSRs
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "kvm_test_harness.h"
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> index 977948fd52e6..fa512d033205 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c
> @@ -4,9 +4,6 @@
>    *
>    * Copyright (C) 2018, Red Hat, Inc.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_name */
> -
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> index ea0cb3cae0f7..3b93f262b797 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
> @@ -10,7 +10,6 @@
>    * and check it can be retrieved with KVM_GET_MSR, also test
>    * the invalid LBR formats are rejected.
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include <linux/bitmap.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> index affc32800158..00dd2ac07a61 100644
> --- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
> @@ -9,7 +9,6 @@
>    * value instead of partially decayed timer value
>    *
>    */
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> index 725c206ba0b9..c78e5f755116 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c
> @@ -19,8 +19,6 @@
>    * Migration is a command line option. When used on non-numa machines will
>    * exit with error. Test is still usefull on non-numa for testing IPIs.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <getopt.h>
>   #include <pthread.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> index ab75b873a4ad..69849acd95b0 100644
> --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <fcntl.h>
>   #include <stdio.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> index 167c97abff1b..f331a4e9bae3 100644
> --- a/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/xss_msr_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Tests for the IA32_XSS MSR.
>    */
> -
> -#define _GNU_SOURCE /* for program_invocation_short_name */
>   #include <sys/ioctl.h>
>   
>   #include "test_util.h"
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index a6f89aaea77d..bdb3955a9452 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>    * Copyright ? 2017-2020 Micka?l Sala?n <mic@digikod.net>
>    * Copyright ? 2019-2020 ANSSI
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 9a6036fbf289..acec1c82c8b4 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>    * Copyright ? 2020 ANSSI
>    * Copyright ? 2020-2022 Microsoft Corporation
>    */
> -
> -#define _GNU_SOURCE
>   #include <fcntl.h>
>   #include <linux/landlock.h>
>   #include <linux/magic.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>    * Copyright ? 2022-2023 Huawei Tech. Co., Ltd.
>    * Copyright ? 2023 Microsoft Corporation
>    */
> -
> -#define _GNU_SOURCE
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>    * Copyright ? 2017-2020 Micka?l Sala?n <mic@digikod.net>
>    * Copyright ? 2019-2020 ANSSI
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/lsm/common.c b/tools/testing/selftests/lsm/common.c
> index 9ad258912646..1b18aac570f1 100644
> --- a/tools/testing/selftests/lsm/common.c
> +++ b/tools/testing/selftests/lsm/common.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright ? 2023 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> index df215e4aa63f..7465bde3f922 100644
> --- a/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_get_self_attr_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> index 06d24d4679a6..a6b44e25c21f 100644
> --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c
> +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <string.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> index 66dec47e3ca3..110c6a07e74c 100644
> --- a/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> +++ b/tools/testing/selftests/lsm/lsm_set_self_attr_test.c
> @@ -5,8 +5,6 @@
>    *
>    * Copyright ? 2022 Casey Schaufler <casey@schaufler-ca.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <linux/lsm.h>
>   #include <string.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> index af89855adb7b..a8a60b6271a5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_impl.h
> +++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
> @@ -1,5 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index a9cc17facfb3..b4651e2ade00 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index 4cdc8b1d124c..17ae5199b916 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <linux/membarrier.h>
>   #include <syscall.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c
> index 8eb3d75f6e60..879d4f4c66fa 100644
> --- a/tools/testing/selftests/memfd/common.c
> +++ b/tools/testing/selftests/memfd/common.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
> index 93798c8c5d54..15bc189bf831 100644
> --- a/tools/testing/selftests/memfd/fuse_test.c
> +++ b/tools/testing/selftests/memfd/fuse_test.c
> @@ -12,8 +12,6 @@
>    * the read() syscall with our memory-mapped memfd object as receive buffer to
>    * force the kernel to write into our memfd object.
>    */
> -
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index 18f585684e20..5172c27a8748 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #define __EXPORTED_HEADERS__
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 363bf5f801be..6f1a36d51f19 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
> index ad168d35b23b..3bfd5a630081 100644
> --- a/tools/testing/selftests/mm/gup_longterm.c
> +++ b/tools/testing/selftests/mm/gup_longterm.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c
> index 267eea2e0e0b..edb46888222f 100644
> --- a/tools/testing/selftests/mm/hugepage-mmap.c
> +++ b/tools/testing/selftests/mm/hugepage-mmap.c
> @@ -16,7 +16,6 @@
>    * range.
>    * Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
> index c463d1c09c9b..8e22822bb754 100644
> --- a/tools/testing/selftests/mm/hugepage-mremap.c
> +++ b/tools/testing/selftests/mm/hugepage-mremap.c
> @@ -11,8 +11,6 @@
>    * To make sure the test triggers pmd sharing and goes through the 'unshare'
>    * path in the mremap code use 1GB (1024) or more.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index e74107185324..70c40c67bc5d 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -11,8 +11,6 @@
>    * filesystem.  Therefore, a hugetlbfs filesystem must be mounted on some
>    * directory.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> index ba6cc6f9cabc..6b8b41b4f754 100644
> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
> index 829320a519e7..d18bf400dae6 100644
> --- a/tools/testing/selftests/mm/khugepaged.c
> +++ b/tools/testing/selftests/mm/khugepaged.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>   #include <ctype.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
> index d615767e396b..1deae905c42e 100644
> --- a/tools/testing/selftests/mm/ksm_functional_tests.c
> +++ b/tools/testing/selftests/mm/ksm_functional_tests.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
> index 17bcb07f19f3..d19ad13ffd7e 100644
> --- a/tools/testing/selftests/mm/madv_populate.c
> +++ b/tools/testing/selftests/mm/madv_populate.c
> @@ -6,7 +6,6 @@
>    *
>    * Author(s): David Hildenbrand <david@redhat.com>
>    */
> -#define _GNU_SOURCE
>   #include <stdlib.h>
>   #include <string.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
> index 5c8a53869b1b..ff4d4079bd0e 100644
> --- a/tools/testing/selftests/mm/map_populate.c
> +++ b/tools/testing/selftests/mm/map_populate.c
> @@ -4,8 +4,6 @@
>    *
>    * MAP_POPULATE | MAP_PRIVATE should COW VMA pages.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sys/mman.h>
> diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
> index 1e01d3ddc11c..200bedcdc32e 100644
> --- a/tools/testing/selftests/mm/mdwe_test.c
> +++ b/tools/testing/selftests/mm/mdwe_test.c
> @@ -7,7 +7,6 @@
>   #include <linux/mman.h>
>   #include <linux/prctl.h>
>   
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <sys/auxv.h>
> diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
> index 9b298f6a04b3..750adede2816 100644
> --- a/tools/testing/selftests/mm/memfd_secret.c
> +++ b/tools/testing/selftests/mm/memfd_secret.c
> @@ -4,8 +4,6 @@
>    *
>    * Author: Mike Rapoport <rppt@linux.ibm.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <sys/uio.h>
>   #include <sys/mman.h>
>   #include <sys/wait.h>
> diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
> index 26f744188ad0..42574290d728 100644
> --- a/tools/testing/selftests/mm/mlock2-tests.c
> +++ b/tools/testing/selftests/mm/mlock2-tests.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sys/mman.h>
>   #include <stdint.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mm/mrelease_test.c b/tools/testing/selftests/mm/mrelease_test.c
> index 100370a7111d..d78bf686e99f 100644
> --- a/tools/testing/selftests/mm/mrelease_test.c
> +++ b/tools/testing/selftests/mm/mrelease_test.c
> @@ -2,7 +2,6 @@
>   /*
>    * Copyright 2022 Google LLC
>    */
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <stdbool.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/mremap_dontunmap.c b/tools/testing/selftests/mm/mremap_dontunmap.c
> index 1d75084b9ca5..934fa6b441b2 100644
> --- a/tools/testing/selftests/mm/mremap_dontunmap.c
> +++ b/tools/testing/selftests/mm/mremap_dontunmap.c
> @@ -5,7 +5,6 @@
>    *
>    * Copyright 2020, Brian Geffon <bgeffon@google.com>
>    */
> -#define _GNU_SOURCE
>   #include <sys/mman.h>
>   #include <linux/mman.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
> index 2f8b991f78cb..e057154630e0 100644
> --- a/tools/testing/selftests/mm/mremap_test.c
> +++ b/tools/testing/selftests/mm/mremap_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Copyright 2020 Google LLC
>    */
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <stdlib.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
> index d59517ed3d48..2a18b5d276f0 100644
> --- a/tools/testing/selftests/mm/pagemap_ioctl.c
> +++ b/tools/testing/selftests/mm/pagemap_ioctl.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <fcntl.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 1af3156a9db8..37d6b01ce90a 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -1,7 +1,6 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
>   #ifndef _PKEYS_HELPER_H
>   #define _PKEYS_HELPER_H
> -#define _GNU_SOURCE
>   #include <string.h>
>   #include <stdarg.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/protection_keys.c b/tools/testing/selftests/mm/protection_keys.c
> index 48dc151f8fca..9f7de92caeda 100644
> --- a/tools/testing/selftests/mm/protection_keys.c
> +++ b/tools/testing/selftests/mm/protection_keys.c
> @@ -21,7 +21,6 @@
>    *	gcc -mxsave      -o protection_keys    -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>    *	gcc -mxsave -m32 -o protection_keys_32 -O2 -g -std=gnu99 -pthread -Wall protection_keys.c -lrt -ldl -lm
>    */
> -#define _GNU_SOURCE
>   #define __SANE_USERSPACE_TYPES__
>   #include <errno.h>
>   #include <linux/elf.h>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index d3c7f5fb3e7b..ae6ac950d7a1 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -3,8 +3,6 @@
>    * A test of splitting PMD THPs and PTE-mapped THPs from a specified virtual
>    * address range in a process via <debugfs>/split_huge_pages interface.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdarg.h>
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index ea7fd8fe2876..28a5c31bd791 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -12,8 +12,6 @@
>      ipcrm -m by hand, like this
>      sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
>      (warning this will remove all if someone else uses them) */
> -
> -#define _GNU_SOURCE 1
>   #include <sys/mman.h>
>   #include <stdlib.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
> index cc5629c3d2aa..abb44319264a 100644
> --- a/tools/testing/selftests/mm/uffd-common.h
> +++ b/tools/testing/selftests/mm/uffd-common.h
> @@ -7,7 +7,6 @@
>   #ifndef __UFFD_COMMON_H__
>   #define __UFFD_COMMON_H__
>   
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <errno.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> index c6a8c732b802..d894417134b6 100644
> --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <stdio.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> index bcf51d785a37..bd975670f61d 100644
> --- a/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> +++ b/tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <stdio.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/af_unix/diag_uid.c b/tools/testing/selftests/net/af_unix/diag_uid.c
> index 79a3dd75590e..279d0c5f70d3 100644
> --- a/tools/testing/selftests/net/af_unix/diag_uid.c
> +++ b/tools/testing/selftests/net/af_unix/diag_uid.c
> @@ -1,7 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright Amazon.com Inc. or its affiliates. */
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> index 7e534594167e..2986b8cd0418 100644
> --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
> +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0 OR MIT
> -#define _GNU_SOURCE
>   #include <error.h>
>   #include <limits.h>
>   #include <stddef.h>
> diff --git a/tools/testing/selftests/net/af_unix/unix_connect.c b/tools/testing/selftests/net/af_unix/unix_connect.c
> index d799fd8f5c7c..34e816862cc7 100644
> --- a/tools/testing/selftests/net/af_unix/unix_connect.c
> +++ b/tools/testing/selftests/net/af_unix/unix_connect.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <stddef.h>
> diff --git a/tools/testing/selftests/net/csum.c b/tools/testing/selftests/net/csum.c
> index 90eb06fefa59..8262aa862331 100644
> --- a/tools/testing/selftests/net/csum.c
> +++ b/tools/testing/selftests/net/csum.c
> @@ -58,9 +58,6 @@
>    * different seed for each run (and logs this for reproducibility). It
>    * is advised to enable this for extra coverage in continuous testing.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/byteorder.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c
> index 353e1e867fbb..f5d7032e6466 100644
> --- a/tools/testing/selftests/net/gro.c
> +++ b/tools/testing/selftests/net/gro.c
> @@ -34,9 +34,6 @@
>    * flakiness is to be expected.
>    *
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
> index f9ed749fd8c7..80c9e567a3d8 100644
> --- a/tools/testing/selftests/net/ip_defrag.c
> +++ b/tools/testing/selftests/net/ip_defrag.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
> index be4a30a0d02a..04aa06d26b09 100644
> --- a/tools/testing/selftests/net/ipsec.c
> +++ b/tools/testing/selftests/net/ipsec.c
> @@ -3,9 +3,6 @@
>    * ipsec.c - Check xfrm on veth inside a net-ns.
>    * Copyright (c) 2018 Dmitry Safonov
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/types.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel.c b/tools/testing/selftests/net/ipv6_flowlabel.c
> index 708a9822259d..b7e0c3c02e20 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel.c
> @@ -1,8 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Test IPV6_FLOWINFO cmsg on send and recv */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/byteorder.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> index af95b48acea9..ebd219ba386e 100644
> --- a/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> +++ b/tools/testing/selftests/net/ipv6_flowlabel_mgr.c
> @@ -1,8 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Test IPV6_FLOWINFO_MGR */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index d2043ec3bf6d..ea93030ed3ec 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <limits.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> index 218aac467321..c5bf873d76c2 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> index 926b0be87c99..7203ca9900e9 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c
> index bdc03a2097e8..9278bf585c80 100644
> --- a/tools/testing/selftests/net/msg_zerocopy.c
> +++ b/tools/testing/selftests/net/msg_zerocopy.c
> @@ -24,9 +24,6 @@
>    * the kernel queues completions on the error queue for all zerocopy
>    * transfers.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
> index cd8a58097448..88e1d3b2ddf1 100644
> --- a/tools/testing/selftests/net/nettest.c
> +++ b/tools/testing/selftests/net/nettest.c
> @@ -3,8 +3,6 @@
>    *
>    * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
>    */
> -
> -#define _GNU_SOURCE
>   #include <features.h>
>   #include <sys/types.h>
>   #include <sys/ioctl.h>
> diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
> index 1a736f700be4..5b2d34440ae9 100644
> --- a/tools/testing/selftests/net/psock_fanout.c
> +++ b/tools/testing/selftests/net/psock_fanout.c
> @@ -26,9 +26,6 @@
>    * Todo:
>    * - functionality: PACKET_FANOUT_FLAG_DEFRAG
>    */
> -
> -#define _GNU_SOURCE		/* for sched_setaffinity */
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/psock_snd.c b/tools/testing/selftests/net/psock_snd.c
> index edf1e6f80d41..2f29b513e18f 100644
> --- a/tools/testing/selftests/net/psock_snd.c
> +++ b/tools/testing/selftests/net/psock_snd.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
> index b8475cb29be7..9ee6ece52865 100644
> --- a/tools/testing/selftests/net/reuseport_addr_any.c
> +++ b/tools/testing/selftests/net/reuseport_addr_any.c
> @@ -3,9 +3,6 @@
>   /* Test that sockets listening on a specific address are preferred
>    * over sockets listening on addr_any.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_cpu.c b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> index 2d646174729f..e93e38cfb2a8 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_cpu.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_cpu.c
> @@ -11,9 +11,6 @@
>    * This entire process is done for several different core id permutations
>    * and for each IPv4/IPv6 and TCP/UDP combination.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_bpf_numa.c b/tools/testing/selftests/net/reuseport_bpf_numa.c
> index c9ba36aa688e..502fdb9ce770 100644
> --- a/tools/testing/selftests/net/reuseport_bpf_numa.c
> +++ b/tools/testing/selftests/net/reuseport_bpf_numa.c
> @@ -3,9 +3,6 @@
>    * Test functionality of BPF filters with SO_REUSEPORT. Same test as
>    * in reuseport_bpf_cpu, only as one socket per NUMA node.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/reuseport_dualstack.c b/tools/testing/selftests/net/reuseport_dualstack.c
> index fb7a59ed759e..d3c3d3f39f8f 100644
> --- a/tools/testing/selftests/net/reuseport_dualstack.c
> +++ b/tools/testing/selftests/net/reuseport_dualstack.c
> @@ -10,9 +10,6 @@
>    * This test creates these mixed AF_INET/AF_INET6 sockets and asserts the
>    * AF_INET preference for v4 packets.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/selftests/net/so_incoming_cpu.c
> index e9fa14e10732..95bd0cdc3253 100644
> --- a/tools/testing/selftests/net/so_incoming_cpu.c
> +++ b/tools/testing/selftests/net/so_incoming_cpu.c
> @@ -1,6 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright Amazon.com Inc. or its affiliates. */
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/so_netns_cookie.c b/tools/testing/selftests/net/so_netns_cookie.c
> index b39e87e967cd..18532d564f79 100644
> --- a/tools/testing/selftests/net/so_netns_cookie.c
> +++ b/tools/testing/selftests/net/so_netns_cookie.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <sched.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
> index 8457b7ccbc09..011a24af9786 100644
> --- a/tools/testing/selftests/net/so_txtime.c
> +++ b/tools/testing/selftests/net/so_txtime.c
> @@ -9,9 +9,6 @@
>    * the expected stream. Sender will read transmit timestamps from the error
>    * queue. The streams can differ due to out-of-order delivery and drops.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
> index 247c3b3ac1c9..fa78b92d9740 100644
> --- a/tools/testing/selftests/net/tap.c
> +++ b/tools/testing/selftests/net/tap.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/tcp_fastopen_backup_key.c b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> index c1cb0c75156a..d30f89bb944c 100644
> --- a/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> +++ b/tools/testing/selftests/net/tcp_fastopen_backup_key.c
> @@ -12,7 +12,6 @@
>    * there are no cases in which a cookie is not accepted by verifying
>    * that TcpExtTCPFastOpenPassiveFail remains 0.
>    */
> -#define _GNU_SOURCE
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/tcp_inq.c b/tools/testing/selftests/net/tcp_inq.c
> index bd6a9c7a3e8a..71ee145f151e 100644
> --- a/tools/testing/selftests/net/tcp_inq.c
> +++ b/tools/testing/selftests/net/tcp_inq.c
> @@ -5,8 +5,6 @@
>    *
>    * Simple example on how to use TCP_INQ and TCP_CM_INQ.
>    */
> -#define _GNU_SOURCE
> -
>   #include <error.h>
>   #include <netinet/in.h>
>   #include <netinet/tcp.h>
> diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
> index 4fcce5150850..72d5f1207ee0 100644
> --- a/tools/testing/selftests/net/tcp_mmap.c
> +++ b/tools/testing/selftests/net/tcp_mmap.c
> @@ -46,7 +46,6 @@
>    * received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
>    *   cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
>    */
> -#define _GNU_SOURCE
>   #include <pthread.h>
>   #include <sys/types.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
> index f27a12d2a2c9..6dbad97d1d0a 100644
> --- a/tools/testing/selftests/net/tls.c
> +++ b/tools/testing/selftests/net/tls.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
> index 9ba03164d73a..e2d739892ce4 100644
> --- a/tools/testing/selftests/net/toeplitz.c
> +++ b/tools/testing/selftests/net/toeplitz.c
> @@ -20,9 +20,6 @@
>    * 5. Compute the cpu that RPS should select based on rx_hash and $rps_bitmap
>    * 6. Compare the cpus from 4 and 5
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
> index fa83918b62d1..a64dcfb242c1 100644
> --- a/tools/testing/selftests/net/tun.c
> +++ b/tools/testing/selftests/net/tun.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/net/txring_overwrite.c b/tools/testing/selftests/net/txring_overwrite.c
> index 7d9ea039450a..96972e0110a0 100644
> --- a/tools/testing/selftests/net/txring_overwrite.c
> +++ b/tools/testing/selftests/net/txring_overwrite.c
> @@ -4,9 +4,6 @@
>    * Verify that consecutive sends over packet tx_ring are mirrored
>    * with their original content intact.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <assert.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
> index ec60a16c9307..33dba9e90dea 100644
> --- a/tools/testing/selftests/net/txtimestamp.c
> +++ b/tools/testing/selftests/net/txtimestamp.c
> @@ -16,9 +16,6 @@
>    * This test requires a dummy TCP server.
>    * A simple `nc6 [-u] -l -p $DESTPORT` will do
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <asm/types.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c
> index 85b3baa3f7f3..9dc1026a033a 100644
> --- a/tools/testing/selftests/net/udpgso.c
> +++ b/tools/testing/selftests/net/udpgso.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <stddef.h>
>   #include <arpa/inet.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 1cbadd267c96..999df1236320 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <error.h>
>   #include <errno.h>
> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
> index 477392715a9a..d7632993b354 100644
> --- a/tools/testing/selftests/net/udpgso_bench_tx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_tx.c
> @@ -1,7 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
> -
>   #include <arpa/inet.h>
>   #include <errno.h>
>   #include <error.h>
> diff --git a/tools/testing/selftests/perf_events/remove_on_exec.c b/tools/testing/selftests/perf_events/remove_on_exec.c
> index 5814611a1dc7..ef4d923f4759 100644
> --- a/tools/testing/selftests/perf_events/remove_on_exec.c
> +++ b/tools/testing/selftests/perf_events/remove_on_exec.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2021, Google LLC.
>    */
>   
> -#define _GNU_SOURCE
> -
>   /* We need the latest siginfo from the kernel repo. */
>   #include <sys/types.h>
>   #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c
> index d1d8483ac628..14d1a3c8cb5c 100644
> --- a/tools/testing/selftests/perf_events/sigtrap_threads.c
> +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c
> @@ -5,8 +5,6 @@
>    * Copyright (C) 2021, Google LLC.
>    */
>   
> -#define _GNU_SOURCE
> -
>   /* We need the latest siginfo from the kernel repo. */
>   #include <sys/types.h>
>   #include <asm/siginfo.h>
> diff --git a/tools/testing/selftests/pid_namespace/regression_enomem.c b/tools/testing/selftests/pid_namespace/regression_enomem.c
> index 7d84097ad45c..54dc8f16d92a 100644
> --- a/tools/testing/selftests/pid_namespace/regression_enomem.c
> +++ b/tools/testing/selftests/pid_namespace/regression_enomem.c
> @@ -1,4 +1,3 @@
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
> index 88d6830ee004..e33177b1aa41 100644
> --- a/tools/testing/selftests/pidfd/pidfd.h
> +++ b/tools/testing/selftests/pidfd/pidfd.h
> @@ -3,7 +3,6 @@
>   #ifndef __PIDFD_H
>   #define __PIDFD_H
>   
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 01cc37bf611c..67c9dc436c71 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <errno.h>
>   #include <fcntl.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> index cd51d547b751..b6a0e9b3d2f5 100644
> --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..781a3931fb5a 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <inttypes.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..a40fb27a78bb 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/types.h>
>   #include <poll.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> index 6e2f2cd400ca..49d7a78cc4fe 100644
> --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index c081ae91313a..c3d52406b8fd 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <fcntl.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c
> index 0dcb8365ddc3..54beba0983f1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_wait.c
> +++ b/tools/testing/selftests/pidfd/pidfd_wait.c
> @@ -1,6 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <linux/sched.h>
>   #include <linux/types.h>
> diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
> index 5297b10d25c3..054a78ebe8b5 100644
> --- a/tools/testing/selftests/ptrace/get_set_sud.c
> +++ b/tools/testing/selftests/ptrace/get_set_sud.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include "../kselftest_harness.h"
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
> index a6884f66dc01..1b7b77190f72 100644
> --- a/tools/testing/selftests/ptrace/peeksiginfo.c
> +++ b/tools/testing/selftests/ptrace/peeksiginfo.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <signal.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> index 2348d2c20d0a..5961c24ee1ae 100644
> --- a/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> +++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <pthread.h>
>   #include <sched.h>
> diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
> index 295eea16466f..1fed749b4bd7 100644
> --- a/tools/testing/selftests/rseq/basic_test.c
> +++ b/tools/testing/selftests/rseq/basic_test.c
> @@ -2,8 +2,6 @@
>   /*
>    * Basic test coverage for critical regions and rseq_current_cpu().
>    */
> -
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <sched.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
> index 2f37961240ca..48a55d94eb72 100644
> --- a/tools/testing/selftests/rseq/param_test.c
> +++ b/tools/testing/selftests/rseq/param_test.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: LGPL-2.1
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <linux/membarrier.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
> index 96e812bdf8a4..88602889414c 100644
> --- a/tools/testing/selftests/rseq/rseq.c
> +++ b/tools/testing/selftests/rseq/rseq.c
> @@ -14,8 +14,6 @@
>    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>    * Lesser General Public License for more details.
>    */
> -
> -#define _GNU_SOURCE
>   #include <errno.h>
>   #include <sched.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> index b83099160fbc..3632a4890da9 100644
> --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
> +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
> @@ -2,7 +2,6 @@
>    * Strictly speaking, this is not a test. But it can report during test
>    * runs so relative performace can be measured.
>    */
> -#define _GNU_SOURCE
>   #include <assert.h>
>   #include <err.h>
>   #include <limits.h>
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 783ebce8c4de..972ccc12553e 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -4,8 +4,6 @@
>    *
>    * Test code for seccomp bpf.
>    */
> -
> -#define _GNU_SOURCE
>   #include <sys/types.h>
>   
>   /*
> diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c
> index 7288a05136ba..a1f156dbbd56 100644
> --- a/tools/testing/selftests/user_events/abi_test.c
> +++ b/tools/testing/selftests/user_events/abi_test.c
> @@ -4,8 +4,6 @@
>    *
>    * Copyright (c) 2022 Beau Belgrave <beaub@linux.microsoft.com>
>    */
> -
> -#define _GNU_SOURCE
>   #include <sched.h>
>   
>   #include <errno.h>
> diff --git a/tools/testing/selftests/x86/amx.c b/tools/testing/selftests/x86/amx.c
> index d884fd69dd51..9441635fc452 100644
> --- a/tools/testing/selftests/x86/amx.c
> +++ b/tools/testing/selftests/x86/amx.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <errno.h>
>   #include <pthread.h>
> diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c
> index 3bc95f3ed585..0129cdae8abe 100644
> --- a/tools/testing/selftests/x86/check_initial_reg_state.c
> +++ b/tools/testing/selftests/x86/check_initial_reg_state.c
> @@ -3,9 +3,6 @@
>    * check_initial_reg_state.c - check that execve sets the correct state
>    * Copyright (c) 2014-2016 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   
>   unsigned long ax, bx, cx, dx, si, di, bp, sp, flags;
> diff --git a/tools/testing/selftests/x86/corrupt_xstate_header.c b/tools/testing/selftests/x86/corrupt_xstate_header.c
> index cf9ce8fbb656..d2c746149678 100644
> --- a/tools/testing/selftests/x86/corrupt_xstate_header.c
> +++ b/tools/testing/selftests/x86/corrupt_xstate_header.c
> @@ -4,9 +4,6 @@
>    *
>    * Based on analysis and a test case from Thomas Gleixner.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c
> index d1e919b0c1dc..9fa9d4a847ac 100644
> --- a/tools/testing/selftests/x86/entry_from_vm86.c
> +++ b/tools/testing/selftests/x86/entry_from_vm86.c
> @@ -5,9 +5,6 @@
>    *
>    * This exercises a few paths that need to special-case vm86 mode.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <assert.h>
>   #include <stdlib.h>
>   #include <sys/syscall.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
> index 8c780cce941d..348134d2cefc 100644
> --- a/tools/testing/selftests/x86/fsgsbase.c
> +++ b/tools/testing/selftests/x86/fsgsbase.c
> @@ -3,8 +3,6 @@
>    * fsgsbase.c, an fsgsbase test
>    * Copyright (c) 2014-2016 Andy Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/fsgsbase_restore.c b/tools/testing/selftests/x86/fsgsbase_restore.c
> index 6fffadc51579..88dce47ab8e6 100644
> --- a/tools/testing/selftests/x86/fsgsbase_restore.c
> +++ b/tools/testing/selftests/x86/fsgsbase_restore.c
> @@ -12,8 +12,6 @@
>    *
>    * This is not part of fsgsbase.c, because that test is 64-bit only.
>    */
> -
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
> index 57ec5e99edb9..07b7c10f8d39 100644
> --- a/tools/testing/selftests/x86/ioperm.c
> +++ b/tools/testing/selftests/x86/ioperm.c
> @@ -3,8 +3,6 @@
>    * ioperm.c - Test case for ioperm(2)
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
> index 7e3e09c1abac..baa691154905 100644
> --- a/tools/testing/selftests/x86/iopl.c
> +++ b/tools/testing/selftests/x86/iopl.c
> @@ -3,8 +3,6 @@
>    * iopl.c - Test case for a Linux on Xen 64-bit bug
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c
> index 215b8150b7cc..39edfd7f6037 100644
> --- a/tools/testing/selftests/x86/lam.c
> +++ b/tools/testing/selftests/x86/lam.c
> @@ -1,5 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c
> index 3a29346e1452..3b4237a85a12 100644
> --- a/tools/testing/selftests/x86/ldt_gdt.c
> +++ b/tools/testing/selftests/x86/ldt_gdt.c
> @@ -3,8 +3,6 @@
>    * ldt_gdt.c - Test cases for LDT and GDT access
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
>   #include <err.h>
>   #include <stdio.h>
>   #include <stdint.h>
> diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
> index cc3de6ff9fba..47ecc63220b7 100644
> --- a/tools/testing/selftests/x86/mov_ss_trap.c
> +++ b/tools/testing/selftests/x86/mov_ss_trap.c
> @@ -19,8 +19,6 @@
>    *
>    * This should mostly cover CVE-2018-1087 and CVE-2018-8897.
>    */
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <sys/ptrace.h>
>   #include <sys/types.h>
> diff --git a/tools/testing/selftests/x86/nx_stack.c b/tools/testing/selftests/x86/nx_stack.c
> index ea4a4e246879..97c5b34096cc 100644
> --- a/tools/testing/selftests/x86/nx_stack.c
> +++ b/tools/testing/selftests/x86/nx_stack.c
> @@ -23,8 +23,6 @@
>    * Regular stack is completely overwritten before testing.
>    * Test doesn't exit SIGSEGV handler after first fault at INT3.
>    */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE
>   #undef NDEBUG
>   #include <assert.h>
>   #include <signal.h>
> diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
> index 12aaa063196e..bdc81c8bd1a7 100644
> --- a/tools/testing/selftests/x86/ptrace_syscall.c
> +++ b/tools/testing/selftests/x86/ptrace_syscall.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#define _GNU_SOURCE
> -
>   #include <sys/ptrace.h>
>   #include <sys/types.h>
>   #include <sys/wait.h>
> diff --git a/tools/testing/selftests/x86/sigaltstack.c b/tools/testing/selftests/x86/sigaltstack.c
> index f689af75e979..7f41c3a4268b 100644
> --- a/tools/testing/selftests/x86/sigaltstack.c
> +++ b/tools/testing/selftests/x86/sigaltstack.c
> @@ -1,6 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0-only
> -
> -#define _GNU_SOURCE
>   #include <signal.h>
>   #include <stdio.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c
> index 5d7961a5f7f6..2054f729b2c2 100644
> --- a/tools/testing/selftests/x86/sigreturn.c
> +++ b/tools/testing/selftests/x86/sigreturn.c
> @@ -24,9 +24,6 @@
>    *
>    * Do not run on outdated, unpatched kernels at risk of nasty crashes.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/time.h>
>   #include <time.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c
> index 9a30f443e928..375f3b50a0b5 100644
> --- a/tools/testing/selftests/x86/single_step_syscall.c
> +++ b/tools/testing/selftests/x86/single_step_syscall.c
> @@ -9,9 +9,6 @@
>    * immediately issues #DB from CPL 0.  This requires special handling in
>    * the kernel.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/time.h>
>   #include <time.h>
>   #include <stdlib.h>
> diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
> index 461fa41a4d02..10eee1bcd015 100644
> --- a/tools/testing/selftests/x86/syscall_arg_fault.c
> +++ b/tools/testing/selftests/x86/syscall_arg_fault.c
> @@ -3,9 +3,6 @@
>    * syscall_arg_fault.c - tests faults 32-bit fast syscall stack args
>    * Copyright (c) 2015 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c
> index 991591718bb0..c72fc8aaa4d3 100644
> --- a/tools/testing/selftests/x86/syscall_numbering.c
> +++ b/tools/testing/selftests/x86/syscall_numbering.c
> @@ -5,9 +5,6 @@
>    *
>    * Copyright (c) 2018 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <stdio.h>
>   #include <stdbool.h>
> diff --git a/tools/testing/selftests/x86/sysret_rip.c b/tools/testing/selftests/x86/sysret_rip.c
> index 84d74be1d902..24bc219358a5 100644
> --- a/tools/testing/selftests/x86/sysret_rip.c
> +++ b/tools/testing/selftests/x86/sysret_rip.c
> @@ -3,9 +3,6 @@
>    * sigreturn.c - tests that x86 avoids Intel SYSRET pitfalls
>    * Copyright (c) 2014-2016 Andrew Lutomirski
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/sysret_ss_attrs.c b/tools/testing/selftests/x86/sysret_ss_attrs.c
> index 5f3d4fca440f..f8b9e0b2a0c5 100644
> --- a/tools/testing/selftests/x86/sysret_ss_attrs.c
> +++ b/tools/testing/selftests/x86/sysret_ss_attrs.c
> @@ -7,9 +7,6 @@
>    * the hidden attributes set to an unusable state.  Make sure the kernel
>    * doesn't let this happen.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdlib.h>
>   #include <unistd.h>
>   #include <stdio.h>
> diff --git a/tools/testing/selftests/x86/test_FCMOV.c b/tools/testing/selftests/x86/test_FCMOV.c
> index 6b5036fbb735..0c9431ba7d31 100644
> --- a/tools/testing/selftests/x86/test_FCMOV.c
> +++ b/tools/testing/selftests/x86/test_FCMOV.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FCOMI.c b/tools/testing/selftests/x86/test_FCOMI.c
> index aec6692c6dcf..ba186665918d 100644
> --- a/tools/testing/selftests/x86/test_FCOMI.c
> +++ b/tools/testing/selftests/x86/test_FCOMI.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_FISTTP.c b/tools/testing/selftests/x86/test_FISTTP.c
> index 09789c0ce3e9..95580cdaaa32 100644
> --- a/tools/testing/selftests/x86/test_FISTTP.c
> +++ b/tools/testing/selftests/x86/test_FISTTP.c
> @@ -1,8 +1,4 @@
>   // SPDX-License-Identifier: GPL-2.0
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_mremap_vdso.c b/tools/testing/selftests/x86/test_mremap_vdso.c
> index f0d876d48277..a8bdba356682 100644
> --- a/tools/testing/selftests/x86/test_mremap_vdso.c
> +++ b/tools/testing/selftests/x86/test_mremap_vdso.c
> @@ -9,7 +9,6 @@
>    * Can be built statically:
>    * gcc -Os -Wall -static -m32 test_mremap_vdso.c
>    */
> -#define _GNU_SOURCE
>   #include <stdio.h>
>   #include <errno.h>
>   #include <unistd.h>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 757e6527f67e..0ceca9064cec 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -7,9 +7,6 @@
>    * special glibc shadow stack support (longjmp(), swapcontext(), etc). Just
>    * stick to the basics and hope the compiler doesn't do anything strange.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <sys/syscall.h>
>   #include <asm/mman.h>
>   #include <sys/mman.h>
> diff --git a/tools/testing/selftests/x86/test_syscall_vdso.c b/tools/testing/selftests/x86/test_syscall_vdso.c
> index 8965c311bd65..5cd13279bba5 100644
> --- a/tools/testing/selftests/x86/test_syscall_vdso.c
> +++ b/tools/testing/selftests/x86/test_syscall_vdso.c
> @@ -8,10 +8,6 @@
>    * Can be built statically:
>    * gcc -Os -Wall -static -m32 test_syscall_vdso.c thunks_32.S
>    */
> -#undef _GNU_SOURCE
> -#define _GNU_SOURCE 1
> -#undef __USE_GNU
> -#define __USE_GNU 1
>   #include <unistd.h>
>   #include <stdlib.h>
>   #include <string.h>
> diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
> index 47cab972807c..cbf4e5012005 100644
> --- a/tools/testing/selftests/x86/test_vsyscall.c
> +++ b/tools/testing/selftests/x86/test_vsyscall.c
> @@ -1,7 +1,4 @@
>   /* SPDX-License-Identifier: GPL-2.0 */
> -
> -#define _GNU_SOURCE
> -
>   #include <stdio.h>
>   #include <sys/time.h>
>   #include <time.h>
> diff --git a/tools/testing/selftests/x86/unwind_vdso.c b/tools/testing/selftests/x86/unwind_vdso.c
> index 4c311e1af4c7..754f5d4d425a 100644
> --- a/tools/testing/selftests/x86/unwind_vdso.c
> +++ b/tools/testing/selftests/x86/unwind_vdso.c
> @@ -5,9 +5,6 @@
>    *
>    * This tests __kernel_vsyscall's unwind info.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <features.h>
>   #include <stdio.h>
>   
> diff --git a/tools/testing/selftests/x86/vdso_restorer.c b/tools/testing/selftests/x86/vdso_restorer.c
> index fe99f2434155..8193de22a390 100644
> --- a/tools/testing/selftests/x86/vdso_restorer.c
> +++ b/tools/testing/selftests/x86/vdso_restorer.c
> @@ -10,9 +10,6 @@
>    * 64-bit userspace has never supported sa_restorer == NULL, so this is
>    * 32-bit only.
>    */
> -
> -#define _GNU_SOURCE
> -
>   #include <err.h>
>   #include <stdio.h>
>   #include <dlfcn.h>

[PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[Edward Liaw]

-D_GNU_SOURCE can be de-duplicated here, as it is added by
KHDR_INCLUDES.

Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/futex/functional/Makefile | 2 +-
 tools/testing/selftests/iommu/Makefile            | 2 --
 tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
 tools/testing/selftests/resctrl/Makefile          | 2 +-
 4 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index a392d0917b4e..f79f9bac7918 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
-CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
+CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
 LDLIBS := -lpthread -lrt
 
 LOCAL_HDRS := \
diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
index 32c5fdfd0eef..fd6477911f24 100644
--- a/tools/testing/selftests/iommu/Makefile
+++ b/tools/testing/selftests/iommu/Makefile
@@ -2,8 +2,6 @@
 CFLAGS += -Wall -O2 -Wno-unused-function
 CFLAGS += $(KHDR_INCLUDES)
 
-CFLAGS += -D_GNU_SOURCE
-
 TEST_GEN_PROGS :=
 TEST_GEN_PROGS += iommufd
 TEST_GEN_PROGS += iommufd_fail_nth
diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
index 522d991e310e..c608b1ec02e6 100644
--- a/tools/testing/selftests/net/tcp_ao/Makefile
+++ b/tools/testing/selftests/net/tcp_ao/Makefile
@@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
 LDLIBS	+= $(LIB) -pthread
 LIBDEPS	:= lib/aolib.h Makefile
 
-CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
+CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
 CFLAGS	+= $(KHDR_INCLUDES)
 CFLAGS	+= -iquote ./lib/ -I ../../../../include/
 
diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
index 2deac2031de9..5073dbc96125 100644
--- a/tools/testing/selftests/resctrl/Makefile
+++ b/tools/testing/selftests/resctrl/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
 CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS := resctrl_tests
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

[PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[Edward Liaw]

-D_GNU_SOURCE can be de-duplicated here, as it is added by
KHDR_INCLUDES.

Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/futex/functional/Makefile | 2 +-
 tools/testing/selftests/iommu/Makefile            | 2 --
 tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
 tools/testing/selftests/resctrl/Makefile          | 2 +-
 4 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index a392d0917b4e..f79f9bac7918 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
-CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
+CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
 LDLIBS := -lpthread -lrt
 
 LOCAL_HDRS := \
diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
index 32c5fdfd0eef..fd6477911f24 100644
--- a/tools/testing/selftests/iommu/Makefile
+++ b/tools/testing/selftests/iommu/Makefile
@@ -2,8 +2,6 @@
 CFLAGS += -Wall -O2 -Wno-unused-function
 CFLAGS += $(KHDR_INCLUDES)
 
-CFLAGS += -D_GNU_SOURCE
-
 TEST_GEN_PROGS :=
 TEST_GEN_PROGS += iommufd
 TEST_GEN_PROGS += iommufd_fail_nth
diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
index 522d991e310e..c608b1ec02e6 100644
--- a/tools/testing/selftests/net/tcp_ao/Makefile
+++ b/tools/testing/selftests/net/tcp_ao/Makefile
@@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
 LDLIBS	+= $(LIB) -pthread
 LIBDEPS	:= lib/aolib.h Makefile
 
-CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
+CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
 CFLAGS	+= $(KHDR_INCLUDES)
 CFLAGS	+= -iquote ./lib/ -I ../../../../include/
 
diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
index 2deac2031de9..5073dbc96125 100644
--- a/tools/testing/selftests/resctrl/Makefile
+++ b/tools/testing/selftests/resctrl/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
 CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS := resctrl_tests
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog


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linux-riscv@lists.infradead.org
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[PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[Edward Liaw]

-D_GNU_SOURCE can be de-duplicated here, as it is added by
KHDR_INCLUDES.

Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/futex/functional/Makefile | 2 +-
 tools/testing/selftests/iommu/Makefile            | 2 --
 tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
 tools/testing/selftests/resctrl/Makefile          | 2 +-
 4 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index a392d0917b4e..f79f9bac7918 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
-CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
+CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
 LDLIBS := -lpthread -lrt
 
 LOCAL_HDRS := \
diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
index 32c5fdfd0eef..fd6477911f24 100644
--- a/tools/testing/selftests/iommu/Makefile
+++ b/tools/testing/selftests/iommu/Makefile
@@ -2,8 +2,6 @@
 CFLAGS += -Wall -O2 -Wno-unused-function
 CFLAGS += $(KHDR_INCLUDES)
 
-CFLAGS += -D_GNU_SOURCE
-
 TEST_GEN_PROGS :=
 TEST_GEN_PROGS += iommufd
 TEST_GEN_PROGS += iommufd_fail_nth
diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
index 522d991e310e..c608b1ec02e6 100644
--- a/tools/testing/selftests/net/tcp_ao/Makefile
+++ b/tools/testing/selftests/net/tcp_ao/Makefile
@@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
 LDLIBS	+= $(LIB) -pthread
 LIBDEPS	:= lib/aolib.h Makefile
 
-CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
+CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
 CFLAGS	+= $(KHDR_INCLUDES)
 CFLAGS	+= -iquote ./lib/ -I ../../../../include/
 
diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
index 2deac2031de9..5073dbc96125 100644
--- a/tools/testing/selftests/resctrl/Makefile
+++ b/tools/testing/selftests/resctrl/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
 CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS := resctrl_tests
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog

Re: [PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> -D_GNU_SOURCE can be de-duplicated here, as it is added by
> KHDR_INCLUDES.
> 
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/futex/functional/Makefile | 2 +-
>  tools/testing/selftests/iommu/Makefile            | 2 --
>  tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
>  tools/testing/selftests/resctrl/Makefile          | 2 +-
>  4 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index a392d0917b4e..f79f9bac7918 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
> -CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
> +CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
>  LDLIBS := -lpthread -lrt
>  
>  LOCAL_HDRS := \
> diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
> index 32c5fdfd0eef..fd6477911f24 100644
> --- a/tools/testing/selftests/iommu/Makefile
> +++ b/tools/testing/selftests/iommu/Makefile
> @@ -2,8 +2,6 @@
>  CFLAGS += -Wall -O2 -Wno-unused-function
>  CFLAGS += $(KHDR_INCLUDES)
>  
> -CFLAGS += -D_GNU_SOURCE
> -
>  TEST_GEN_PROGS :=
>  TEST_GEN_PROGS += iommufd
>  TEST_GEN_PROGS += iommufd_fail_nth
> diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
> index 522d991e310e..c608b1ec02e6 100644
> --- a/tools/testing/selftests/net/tcp_ao/Makefile
> +++ b/tools/testing/selftests/net/tcp_ao/Makefile
> @@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
>  LDLIBS	+= $(LIB) -pthread
>  LIBDEPS	:= lib/aolib.h Makefile
>  
> -CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
> +CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
>  CFLAGS	+= $(KHDR_INCLUDES)
>  CFLAGS	+= -iquote ./lib/ -I ../../../../include/
>  
> diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
> index 2deac2031de9..5073dbc96125 100644
> --- a/tools/testing/selftests/resctrl/Makefile
> +++ b/tools/testing/selftests/resctrl/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  
> -CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
> +CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
>  CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_GEN_PROGS := resctrl_tests

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> -D_GNU_SOURCE can be de-duplicated here, as it is added by
> KHDR_INCLUDES.
> 
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/futex/functional/Makefile | 2 +-
>  tools/testing/selftests/iommu/Makefile            | 2 --
>  tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
>  tools/testing/selftests/resctrl/Makefile          | 2 +-
>  4 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index a392d0917b4e..f79f9bac7918 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
> -CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
> +CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
>  LDLIBS := -lpthread -lrt
>  
>  LOCAL_HDRS := \
> diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
> index 32c5fdfd0eef..fd6477911f24 100644
> --- a/tools/testing/selftests/iommu/Makefile
> +++ b/tools/testing/selftests/iommu/Makefile
> @@ -2,8 +2,6 @@
>  CFLAGS += -Wall -O2 -Wno-unused-function
>  CFLAGS += $(KHDR_INCLUDES)
>  
> -CFLAGS += -D_GNU_SOURCE
> -
>  TEST_GEN_PROGS :=
>  TEST_GEN_PROGS += iommufd
>  TEST_GEN_PROGS += iommufd_fail_nth
> diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
> index 522d991e310e..c608b1ec02e6 100644
> --- a/tools/testing/selftests/net/tcp_ao/Makefile
> +++ b/tools/testing/selftests/net/tcp_ao/Makefile
> @@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
>  LDLIBS	+= $(LIB) -pthread
>  LIBDEPS	:= lib/aolib.h Makefile
>  
> -CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
> +CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
>  CFLAGS	+= $(KHDR_INCLUDES)
>  CFLAGS	+= -iquote ./lib/ -I ../../../../include/
>  
> diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
> index 2deac2031de9..5073dbc96125 100644
> --- a/tools/testing/selftests/resctrl/Makefile
> +++ b/tools/testing/selftests/resctrl/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  
> -CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
> +CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
>  CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_GEN_PROGS := resctrl_tests

-- 
BR,
Muhammad Usama Anjum

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[PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[Muhammad Usama Anjum]

On 5/8/24 2:38 AM, Edward Liaw wrote:
> -D_GNU_SOURCE can be de-duplicated here, as it is added by
> KHDR_INCLUDES.
> 
> Signed-off-by: Edward Liaw <edliaw@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  tools/testing/selftests/futex/functional/Makefile | 2 +-
>  tools/testing/selftests/iommu/Makefile            | 2 --
>  tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
>  tools/testing/selftests/resctrl/Makefile          | 2 +-
>  4 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index a392d0917b4e..f79f9bac7918 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
> -CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
> +CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
>  LDLIBS := -lpthread -lrt
>  
>  LOCAL_HDRS := \
> diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
> index 32c5fdfd0eef..fd6477911f24 100644
> --- a/tools/testing/selftests/iommu/Makefile
> +++ b/tools/testing/selftests/iommu/Makefile
> @@ -2,8 +2,6 @@
>  CFLAGS += -Wall -O2 -Wno-unused-function
>  CFLAGS += $(KHDR_INCLUDES)
>  
> -CFLAGS += -D_GNU_SOURCE
> -
>  TEST_GEN_PROGS :=
>  TEST_GEN_PROGS += iommufd
>  TEST_GEN_PROGS += iommufd_fail_nth
> diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
> index 522d991e310e..c608b1ec02e6 100644
> --- a/tools/testing/selftests/net/tcp_ao/Makefile
> +++ b/tools/testing/selftests/net/tcp_ao/Makefile
> @@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
>  LDLIBS	+= $(LIB) -pthread
>  LIBDEPS	:= lib/aolib.h Makefile
>  
> -CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
> +CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
>  CFLAGS	+= $(KHDR_INCLUDES)
>  CFLAGS	+= -iquote ./lib/ -I ../../../../include/
>  
> diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
> index 2deac2031de9..5073dbc96125 100644
> --- a/tools/testing/selftests/resctrl/Makefile
> +++ b/tools/testing/selftests/resctrl/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  
> -CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
> +CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
>  CFLAGS += $(KHDR_INCLUDES)
>  
>  TEST_GEN_PROGS := resctrl_tests

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> -D_GNU_SOURCE can be de-duplicated here, as it is added by
> KHDR_INCLUDES.
> 
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---

Most of the churn in these Makefiles can be avoided if it is possible to
take my recommendation on patch 3/5 [1].

However, as it is, it is correct, so if the above does not happen,
please feel free to add:

Reviewed-by: John Hubbard <jhubbard@nvidia.com>


[1] https://lore.kernel.org/all/ec8ab737-a841-4cd5-8ec1-e0a777744262@nvidia.com/

thanks,
-- 
John Hubbard
NVIDIA

>   tools/testing/selftests/futex/functional/Makefile | 2 +-
>   tools/testing/selftests/iommu/Makefile            | 2 --
>   tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
>   tools/testing/selftests/resctrl/Makefile          | 2 +-
>   4 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index a392d0917b4e..f79f9bac7918 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
> -CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
> +CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
>   LDLIBS := -lpthread -lrt
>   
>   LOCAL_HDRS := \
> diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
> index 32c5fdfd0eef..fd6477911f24 100644
> --- a/tools/testing/selftests/iommu/Makefile
> +++ b/tools/testing/selftests/iommu/Makefile
> @@ -2,8 +2,6 @@
>   CFLAGS += -Wall -O2 -Wno-unused-function
>   CFLAGS += $(KHDR_INCLUDES)
>   
> -CFLAGS += -D_GNU_SOURCE
> -
>   TEST_GEN_PROGS :=
>   TEST_GEN_PROGS += iommufd
>   TEST_GEN_PROGS += iommufd_fail_nth
> diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
> index 522d991e310e..c608b1ec02e6 100644
> --- a/tools/testing/selftests/net/tcp_ao/Makefile
> +++ b/tools/testing/selftests/net/tcp_ao/Makefile
> @@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
>   LDLIBS	+= $(LIB) -pthread
>   LIBDEPS	:= lib/aolib.h Makefile
>   
> -CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
> +CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
>   CFLAGS	+= $(KHDR_INCLUDES)
>   CFLAGS	+= -iquote ./lib/ -I ../../../../include/
>   
> diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
> index 2deac2031de9..5073dbc96125 100644
> --- a/tools/testing/selftests/resctrl/Makefile
> +++ b/tools/testing/selftests/resctrl/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   
> -CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
> +CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
>   CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_GEN_PROGS := resctrl_tests

Re: [PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> -D_GNU_SOURCE can be de-duplicated here, as it is added by
> KHDR_INCLUDES.
> 
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---

Most of the churn in these Makefiles can be avoided if it is possible to
take my recommendation on patch 3/5 [1].

However, as it is, it is correct, so if the above does not happen,
please feel free to add:

Reviewed-by: John Hubbard <jhubbard@nvidia.com>


[1] https://lore.kernel.org/all/ec8ab737-a841-4cd5-8ec1-e0a777744262@nvidia.com/

thanks,
-- 
John Hubbard
NVIDIA

>   tools/testing/selftests/futex/functional/Makefile | 2 +-
>   tools/testing/selftests/iommu/Makefile            | 2 --
>   tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
>   tools/testing/selftests/resctrl/Makefile          | 2 +-
>   4 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index a392d0917b4e..f79f9bac7918 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
> -CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
> +CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
>   LDLIBS := -lpthread -lrt
>   
>   LOCAL_HDRS := \
> diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
> index 32c5fdfd0eef..fd6477911f24 100644
> --- a/tools/testing/selftests/iommu/Makefile
> +++ b/tools/testing/selftests/iommu/Makefile
> @@ -2,8 +2,6 @@
>   CFLAGS += -Wall -O2 -Wno-unused-function
>   CFLAGS += $(KHDR_INCLUDES)
>   
> -CFLAGS += -D_GNU_SOURCE
> -
>   TEST_GEN_PROGS :=
>   TEST_GEN_PROGS += iommufd
>   TEST_GEN_PROGS += iommufd_fail_nth
> diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
> index 522d991e310e..c608b1ec02e6 100644
> --- a/tools/testing/selftests/net/tcp_ao/Makefile
> +++ b/tools/testing/selftests/net/tcp_ao/Makefile
> @@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
>   LDLIBS	+= $(LIB) -pthread
>   LIBDEPS	:= lib/aolib.h Makefile
>   
> -CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
> +CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
>   CFLAGS	+= $(KHDR_INCLUDES)
>   CFLAGS	+= -iquote ./lib/ -I ../../../../include/
>   
> diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
> index 2deac2031de9..5073dbc96125 100644
> --- a/tools/testing/selftests/resctrl/Makefile
> +++ b/tools/testing/selftests/resctrl/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   
> -CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
> +CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
>   CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_GEN_PROGS := resctrl_tests



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[PATCH v2 5/5] selftests: Drop duplicate -D_GNU_SOURCE

[John Hubbard]

On 5/7/24 2:38 PM, Edward Liaw wrote:
> -D_GNU_SOURCE can be de-duplicated here, as it is added by
> KHDR_INCLUDES.
> 
> Signed-off-by: Edward Liaw <edliaw@google.com>
> ---

Most of the churn in these Makefiles can be avoided if it is possible to
take my recommendation on patch 3/5 [1].

However, as it is, it is correct, so if the above does not happen,
please feel free to add:

Reviewed-by: John Hubbard <jhubbard@nvidia.com>


[1] https://lore.kernel.org/all/ec8ab737-a841-4cd5-8ec1-e0a777744262 at nvidia.com/

thanks,
-- 
John Hubbard
NVIDIA

>   tools/testing/selftests/futex/functional/Makefile | 2 +-
>   tools/testing/selftests/iommu/Makefile            | 2 --
>   tools/testing/selftests/net/tcp_ao/Makefile       | 2 +-
>   tools/testing/selftests/resctrl/Makefile          | 2 +-
>   4 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index a392d0917b4e..f79f9bac7918 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
> -CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE -pthread $(INCLUDES) $(KHDR_INCLUDES)
> +CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
>   LDLIBS := -lpthread -lrt
>   
>   LOCAL_HDRS := \
> diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
> index 32c5fdfd0eef..fd6477911f24 100644
> --- a/tools/testing/selftests/iommu/Makefile
> +++ b/tools/testing/selftests/iommu/Makefile
> @@ -2,8 +2,6 @@
>   CFLAGS += -Wall -O2 -Wno-unused-function
>   CFLAGS += $(KHDR_INCLUDES)
>   
> -CFLAGS += -D_GNU_SOURCE
> -
>   TEST_GEN_PROGS :=
>   TEST_GEN_PROGS += iommufd
>   TEST_GEN_PROGS += iommufd_fail_nth
> diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
> index 522d991e310e..c608b1ec02e6 100644
> --- a/tools/testing/selftests/net/tcp_ao/Makefile
> +++ b/tools/testing/selftests/net/tcp_ao/Makefile
> @@ -26,7 +26,7 @@ LIB	:= $(LIBDIR)/libaotst.a
>   LDLIBS	+= $(LIB) -pthread
>   LIBDEPS	:= lib/aolib.h Makefile
>   
> -CFLAGS	:= -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
> +CFLAGS	:= -Wall -O2 -g -fno-strict-aliasing
>   CFLAGS	+= $(KHDR_INCLUDES)
>   CFLAGS	+= -iquote ./lib/ -I ../../../../include/
>   
> diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
> index 2deac2031de9..5073dbc96125 100644
> --- a/tools/testing/selftests/resctrl/Makefile
> +++ b/tools/testing/selftests/resctrl/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   
> -CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
> +CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
>   CFLAGS += $(KHDR_INCLUDES)
>   
>   TEST_GEN_PROGS := resctrl_tests

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[MPTCP CI]

Hi Edward,

Thank you for your modifications, that's great!

Our CI did some validations and here is its report:

- KVM Validation: normal: Success! ✅
- KVM Validation: debug: Success! ✅
- KVM Validation: btf (only bpftest_all): Success! ✅
- Task: https://github.com/multipath-tcp/mptcp_net-next/actions/runs/8992857887

Initiator: Patchew Applier
Commits: https://github.com/multipath-tcp/mptcp_net-next/commits/13e61f25eef2
Patchwork: https://patchwork.kernel.org/project/mptcp/list/?series=851355


If there are some issues, you can reproduce them using the same environment as
the one used by the CI thanks to a docker image, e.g.:

    $ cd [kernel source code]
    $ docker run -v "${PWD}:${PWD}:rw" -w "${PWD}" --privileged --rm -it \
        --pull always mptcp/mptcp-upstream-virtme-docker:latest \
        auto-normal

For more details:

    https://github.com/multipath-tcp/mptcp-upstream-virtme-docker


Please note that despite all the efforts that have been already done to have a
stable tests suite when executed on a public CI like here, it is possible some
reported issues are not due to your modifications. Still, do not hesitate to
help us improve that ;-)

Cheers,
MPTCP GH Action bot
Bot operated by Matthieu Baerts (NGI0 Core)

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Kees Cook]

On Tue, May 07, 2024 at 09:38:25PM +0000, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>   selftests: Compile kselftest headers with -D_GNU_SOURCE
>   selftests/sgx: Include KHDR_INCLUDES in Makefile
>   selftests: Include KHDR_INCLUDES in Makefile
>   selftests: Drop define _GNU_SOURCE
>   selftests: Drop duplicate -D_GNU_SOURCE

It's a lot of churn, but I don't see a way to do it differently. :)

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Kees Cook]

On Tue, May 07, 2024 at 09:38:25PM +0000, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>   selftests: Compile kselftest headers with -D_GNU_SOURCE
>   selftests/sgx: Include KHDR_INCLUDES in Makefile
>   selftests: Include KHDR_INCLUDES in Makefile
>   selftests: Drop define _GNU_SOURCE
>   selftests: Drop duplicate -D_GNU_SOURCE

It's a lot of churn, but I don't see a way to do it differently. :)

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook

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http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Kees Cook]

On Tue, May 07, 2024 at 09:38:25PM +0000, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>   selftests: Compile kselftest headers with -D_GNU_SOURCE
>   selftests/sgx: Include KHDR_INCLUDES in Makefile
>   selftests: Include KHDR_INCLUDES in Makefile
>   selftests: Drop define _GNU_SOURCE
>   selftests: Drop duplicate -D_GNU_SOURCE

It's a lot of churn, but I don't see a way to do it differently. :)

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Sean Christopherson]

On Tue, May 07, 2024, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>   selftests: Compile kselftest headers with -D_GNU_SOURCE
>   selftests/sgx: Include KHDR_INCLUDES in Makefile
>   selftests: Include KHDR_INCLUDES in Makefile
>   selftests: Drop define _GNU_SOURCE
>   selftests: Drop duplicate -D_GNU_SOURCE

Can you rebase this on top of linux-next?  I have a conflicting fix[*] for the
KVM selftests queued for 6.10, and I would prefer not to drop that commit at
this stage as it would require a rebase of a pile of other commits.

And I doubt KVM is the only subsystem that has a targeted fix for the _GNU_SOURCE
mess.

If we want/need to get a fix into 6.9, then IMO we should just revert 809216233555
("selftests/harness: remove use of LINE_MAX"), as that came in quite late in the
6.9 cycle, and I don't think it's feasible to be 100% confident that globally
defining _GNU_SOURCE works for all selftests, i.e. we really should have a full
cycle for folks to test.

[*] https://github.com/kvm-x86/linux/commit/730cfa45b5f4

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Sean Christopherson]

On Tue, May 07, 2024, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>   selftests: Compile kselftest headers with -D_GNU_SOURCE
>   selftests/sgx: Include KHDR_INCLUDES in Makefile
>   selftests: Include KHDR_INCLUDES in Makefile
>   selftests: Drop define _GNU_SOURCE
>   selftests: Drop duplicate -D_GNU_SOURCE

Can you rebase this on top of linux-next?  I have a conflicting fix[*] for the
KVM selftests queued for 6.10, and I would prefer not to drop that commit at
this stage as it would require a rebase of a pile of other commits.

And I doubt KVM is the only subsystem that has a targeted fix for the _GNU_SOURCE
mess.

If we want/need to get a fix into 6.9, then IMO we should just revert 809216233555
("selftests/harness: remove use of LINE_MAX"), as that came in quite late in the
6.9 cycle, and I don't think it's feasible to be 100% confident that globally
defining _GNU_SOURCE works for all selftests, i.e. we really should have a full
cycle for folks to test.

[*] https://github.com/kvm-x86/linux/commit/730cfa45b5f4

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http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Sean Christopherson]

On Tue, May 07, 2024, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>   selftests: Compile kselftest headers with -D_GNU_SOURCE
>   selftests/sgx: Include KHDR_INCLUDES in Makefile
>   selftests: Include KHDR_INCLUDES in Makefile
>   selftests: Drop define _GNU_SOURCE
>   selftests: Drop duplicate -D_GNU_SOURCE

Can you rebase this on top of linux-next?  I have a conflicting fix[*] for the
KVM selftests queued for 6.10, and I would prefer not to drop that commit at
this stage as it would require a rebase of a pile of other commits.

And I doubt KVM is the only subsystem that has a targeted fix for the _GNU_SOURCE
mess.

If we want/need to get a fix into 6.9, then IMO we should just revert 809216233555
("selftests/harness: remove use of LINE_MAX"), as that came in quite late in the
6.9 cycle, and I don't think it's feasible to be 100% confident that globally
defining _GNU_SOURCE works for all selftests, i.e. we really should have a full
cycle for folks to test.

[*] https://github.com/kvm-x86/linux/commit/730cfa45b5f4

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Wed, May 8, 2024 at 6:47 AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Tue, May 07, 2024, Edward Liaw wrote:
> > 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> > asprintf into kselftest_harness.h, which is a GNU extension and needs
> > _GNU_SOURCE to either be defined prior to including headers or with the
> > -D_GNU_SOURCE flag passed to the compiler.
> >
> > v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> > v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> > location.  Remove #define _GNU_SOURCE from source code to resolve
> > redefinition warnings.
> >
> > Edward Liaw (5):
> >   selftests: Compile kselftest headers with -D_GNU_SOURCE
> >   selftests/sgx: Include KHDR_INCLUDES in Makefile
> >   selftests: Include KHDR_INCLUDES in Makefile
> >   selftests: Drop define _GNU_SOURCE
> >   selftests: Drop duplicate -D_GNU_SOURCE
>
> Can you rebase this on top of linux-next?  I have a conflicting fix[*] for the
> KVM selftests queued for 6.10, and I would prefer not to drop that commit at
> this stage as it would require a rebase of a pile of other commits.

Ok, I'll do that.

>
> And I doubt KVM is the only subsystem that has a targeted fix for the _GNU_SOURCE
> mess.
>
> If we want/need to get a fix into 6.9, then IMO we should just revert 809216233555
> ("selftests/harness: remove use of LINE_MAX"), as that came in quite late in the
> 6.9 cycle, and I don't think it's feasible to be 100% confident that globally
> defining _GNU_SOURCE works for all selftests, i.e. we really should have a full
> cycle for folks to test.

That sounds reasonable to me.  In this thread Tao suggested reverting
back to 809216233555 and using a fixed value in place of LINE_MAX to
fix 38c957f07038
https://lore.kernel.org/linux-kselftest/20240508070003.2acdf9b4@kernel.org/

>
> [*] https://github.com/kvm-x86/linux/commit/730cfa45b5f4

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Wed, May 8, 2024 at 6:47 AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Tue, May 07, 2024, Edward Liaw wrote:
> > 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> > asprintf into kselftest_harness.h, which is a GNU extension and needs
> > _GNU_SOURCE to either be defined prior to including headers or with the
> > -D_GNU_SOURCE flag passed to the compiler.
> >
> > v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> > v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> > location.  Remove #define _GNU_SOURCE from source code to resolve
> > redefinition warnings.
> >
> > Edward Liaw (5):
> >   selftests: Compile kselftest headers with -D_GNU_SOURCE
> >   selftests/sgx: Include KHDR_INCLUDES in Makefile
> >   selftests: Include KHDR_INCLUDES in Makefile
> >   selftests: Drop define _GNU_SOURCE
> >   selftests: Drop duplicate -D_GNU_SOURCE
>
> Can you rebase this on top of linux-next?  I have a conflicting fix[*] for the
> KVM selftests queued for 6.10, and I would prefer not to drop that commit at
> this stage as it would require a rebase of a pile of other commits.

Ok, I'll do that.

>
> And I doubt KVM is the only subsystem that has a targeted fix for the _GNU_SOURCE
> mess.
>
> If we want/need to get a fix into 6.9, then IMO we should just revert 809216233555
> ("selftests/harness: remove use of LINE_MAX"), as that came in quite late in the
> 6.9 cycle, and I don't think it's feasible to be 100% confident that globally
> defining _GNU_SOURCE works for all selftests, i.e. we really should have a full
> cycle for folks to test.

That sounds reasonable to me.  In this thread Tao suggested reverting
back to 809216233555 and using a fixed value in place of LINE_MAX to
fix 38c957f07038
https://lore.kernel.org/linux-kselftest/20240508070003.2acdf9b4@kernel.org/

>
> [*] https://github.com/kvm-x86/linux/commit/730cfa45b5f4

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[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Wed, May 8, 2024 at 6:47?AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Tue, May 07, 2024, Edward Liaw wrote:
> > 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> > asprintf into kselftest_harness.h, which is a GNU extension and needs
> > _GNU_SOURCE to either be defined prior to including headers or with the
> > -D_GNU_SOURCE flag passed to the compiler.
> >
> > v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
> > v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> > location.  Remove #define _GNU_SOURCE from source code to resolve
> > redefinition warnings.
> >
> > Edward Liaw (5):
> >   selftests: Compile kselftest headers with -D_GNU_SOURCE
> >   selftests/sgx: Include KHDR_INCLUDES in Makefile
> >   selftests: Include KHDR_INCLUDES in Makefile
> >   selftests: Drop define _GNU_SOURCE
> >   selftests: Drop duplicate -D_GNU_SOURCE
>
> Can you rebase this on top of linux-next?  I have a conflicting fix[*] for the
> KVM selftests queued for 6.10, and I would prefer not to drop that commit at
> this stage as it would require a rebase of a pile of other commits.

Ok, I'll do that.

>
> And I doubt KVM is the only subsystem that has a targeted fix for the _GNU_SOURCE
> mess.
>
> If we want/need to get a fix into 6.9, then IMO we should just revert 809216233555
> ("selftests/harness: remove use of LINE_MAX"), as that came in quite late in the
> 6.9 cycle, and I don't think it's feasible to be 100% confident that globally
> defining _GNU_SOURCE works for all selftests, i.e. we really should have a full
> cycle for folks to test.

That sounds reasonable to me.  In this thread Tao suggested reverting
back to 809216233555 and using a fixed value in place of LINE_MAX to
fix 38c957f07038
https://lore.kernel.org/linux-kselftest/20240508070003.2acdf9b4 at kernel.org/

>
> [*] https://github.com/kvm-x86/linux/commit/730cfa45b5f4

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Shuah Khan]

On 5/7/24 15:38, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>    selftests: Compile kselftest headers with -D_GNU_SOURCE
>    selftests/sgx: Include KHDR_INCLUDES in Makefile

I appled patches 1/5 and 2.5 - The rest need to be split up.

>    selftests: Include KHDR_INCLUDES in Makefile
>    selftests: Drop define _GNU_SOURCE
>    selftests: Drop duplicate -D_GNU_SOURCE
> 

Please split these patches pwe test directory. Otherwise it will
cause merge conflicts which can be hard to resolve.

>   tools/testing/selftests/Makefile                              | 4 ++--
>   tools/testing/selftests/alsa/Makefile                         | 2 +-
>   tools/testing/selftests/arm64/signal/Makefile                 | 2 +-
>   tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>   tools/testing/selftests/capabilities/test_execve.c            | 2 --
>   tools/testing/selftests/clone3/clone3.c                       | 2 --
>   .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>   tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>   tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>   tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>   tools/testing/selftests/core/close_range_test.c               | 2 --
>   tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>   tools/testing/selftests/exec/Makefile                         | 2 +-
>   tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>   tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>   tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>   tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>   tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>   tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>   tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>   tools/testing/selftests/filesystems/overlayfs/Makefile        | 2 +-
>   tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>   .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>   tools/testing/selftests/futex/functional/Makefile             | 2 +-
>   tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>   tools/testing/selftests/hid/Makefile                          | 2 +-
>   tools/testing/selftests/iommu/Makefile                        | 2 --
>   tools/testing/selftests/ipc/msgque.c                          | 1 -
>   tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>   tools/testing/selftests/kselftest_harness.h                   | 2 +-
>   tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>   tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>   tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>   tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>   tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>   tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>   tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>   tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>   tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>   tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>   tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>   tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>   tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>   tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>   tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>   tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>   tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>   tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>   tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>   tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>   .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>   tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>   tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>   tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>   tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>   tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>   tools/testing/selftests/kvm/steal_time.c                      | 1 -
>   tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>   .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>   tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>   tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>   tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>   .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>   tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>   .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>   tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>   tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>   tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>   tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>   tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>   .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>   tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>   tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>   tools/testing/selftests/landlock/base_test.c                  | 2 --
>   tools/testing/selftests/landlock/fs_test.c                    | 2 --
>   tools/testing/selftests/landlock/net_test.c                   | 2 --
>   tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>   tools/testing/selftests/lib.mk                                | 2 +-
>   tools/testing/selftests/lsm/common.c                          | 2 --
>   tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>   tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>   tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>   tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>   .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>   .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>   tools/testing/selftests/memfd/common.c                        | 1 -
>   tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>   tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>   tools/testing/selftests/mm/cow.c                              | 1 -
>   tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>   tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>   tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>   tools/testing/selftests/mm/khugepaged.c                       | 1 -
>   tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>   tools/testing/selftests/mm/madv_populate.c                    | 1 -
>   tools/testing/selftests/mm/map_populate.c                     | 2 --
>   tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>   tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>   tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>   tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>   tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>   tools/testing/selftests/mm/mremap_test.c                      | 2 --
>   tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>   tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>   tools/testing/selftests/mm/protection_keys.c                  | 1 -
>   tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>   tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>   tools/testing/selftests/mm/uffd-common.h                      | 1 -
>   tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>   .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>   tools/testing/selftests/nci/Makefile                          | 2 +-
>   tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>   tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>   tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>   tools/testing/selftests/net/csum.c                            | 3 ---
>   tools/testing/selftests/net/gro.c                             | 3 ---
>   tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>   tools/testing/selftests/net/ipsec.c                           | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>   tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>   tools/testing/selftests/net/nettest.c                         | 2 --
>   tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>   tools/testing/selftests/net/psock_snd.c                       | 3 ---
>   tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>   tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>   tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>   tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>   tools/testing/selftests/net/so_txtime.c                       | 3 ---
>   tools/testing/selftests/net/tap.c                             | 3 ---
>   tools/testing/selftests/net/tcp_ao/Makefile                   | 2 +-
>   tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>   tools/testing/selftests/net/tcp_inq.c                         | 2 --
>   tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>   tools/testing/selftests/net/tls.c                             | 3 ---
>   tools/testing/selftests/net/toeplitz.c                        | 3 ---
>   tools/testing/selftests/net/tun.c                             | 3 ---
>   tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>   tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>   tools/testing/selftests/net/udpgso.c                          | 3 ---
>   tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>   tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>   tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>   tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>   tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>   tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>   tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>   tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>   tools/testing/selftests/prctl/Makefile                        | 2 ++
>   tools/testing/selftests/proc/Makefile                         | 2 +-
>   tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>   tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>   tools/testing/selftests/resctrl/Makefile                      | 2 +-
>   tools/testing/selftests/riscv/mm/Makefile                     | 2 +-
>   tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>   tools/testing/selftests/rseq/basic_test.c                     | 2 --
>   tools/testing/selftests/rseq/param_test.c                     | 1 -
>   tools/testing/selftests/rseq/rseq.c                           | 2 --
>   tools/testing/selftests/rtc/Makefile                          | 2 +-
>   tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>   tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>   tools/testing/selftests/sgx/Makefile                          | 2 +-
>   tools/testing/selftests/sgx/sigstruct.c                       | 1 -
>   tools/testing/selftests/tmpfs/Makefile                        | 2 +-
>   tools/testing/selftests/user_events/abi_test.c                | 2 --
>   tools/testing/selftests/x86/amx.c                             | 2 --
>   tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>   tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>   tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>   tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>   tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>   tools/testing/selftests/x86/ioperm.c                          | 2 --
>   tools/testing/selftests/x86/iopl.c                            | 2 --
>   tools/testing/selftests/x86/lam.c                             | 1 -
>   tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>   tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>   tools/testing/selftests/x86/nx_stack.c                        | 2 --
>   tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>   tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>   tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>   tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>   tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>   tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>   tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>   tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>   tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>   tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>   tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>   tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>   tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>   tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>   tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>   tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>   tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>   218 files changed, 20 insertions(+), 426 deletions(-)
> 
> --
> 2.45.0.rc1.225.g2a3ae87e7f-goog
> 
> 

thanks,
-- Shuah

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Shuah Khan]

On 5/7/24 15:38, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>    selftests: Compile kselftest headers with -D_GNU_SOURCE
>    selftests/sgx: Include KHDR_INCLUDES in Makefile

I appled patches 1/5 and 2.5 - The rest need to be split up.

>    selftests: Include KHDR_INCLUDES in Makefile
>    selftests: Drop define _GNU_SOURCE
>    selftests: Drop duplicate -D_GNU_SOURCE
> 

Please split these patches pwe test directory. Otherwise it will
cause merge conflicts which can be hard to resolve.

>   tools/testing/selftests/Makefile                              | 4 ++--
>   tools/testing/selftests/alsa/Makefile                         | 2 +-
>   tools/testing/selftests/arm64/signal/Makefile                 | 2 +-
>   tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>   tools/testing/selftests/capabilities/test_execve.c            | 2 --
>   tools/testing/selftests/clone3/clone3.c                       | 2 --
>   .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>   tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>   tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>   tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>   tools/testing/selftests/core/close_range_test.c               | 2 --
>   tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>   tools/testing/selftests/exec/Makefile                         | 2 +-
>   tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>   tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>   tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>   tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>   tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>   tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>   tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>   tools/testing/selftests/filesystems/overlayfs/Makefile        | 2 +-
>   tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>   .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>   tools/testing/selftests/futex/functional/Makefile             | 2 +-
>   tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>   tools/testing/selftests/hid/Makefile                          | 2 +-
>   tools/testing/selftests/iommu/Makefile                        | 2 --
>   tools/testing/selftests/ipc/msgque.c                          | 1 -
>   tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>   tools/testing/selftests/kselftest_harness.h                   | 2 +-
>   tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>   tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>   tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>   tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>   tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>   tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>   tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>   tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>   tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>   tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>   tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>   tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>   tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>   tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>   tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>   tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>   tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>   tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>   tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>   tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>   .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>   tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>   tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>   tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>   tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>   tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>   tools/testing/selftests/kvm/steal_time.c                      | 1 -
>   tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>   .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>   tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>   tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>   tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>   .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>   tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>   .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>   tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>   tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>   tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>   tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>   tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>   .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>   tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>   tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>   tools/testing/selftests/landlock/base_test.c                  | 2 --
>   tools/testing/selftests/landlock/fs_test.c                    | 2 --
>   tools/testing/selftests/landlock/net_test.c                   | 2 --
>   tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>   tools/testing/selftests/lib.mk                                | 2 +-
>   tools/testing/selftests/lsm/common.c                          | 2 --
>   tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>   tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>   tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>   tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>   .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>   .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>   tools/testing/selftests/memfd/common.c                        | 1 -
>   tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>   tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>   tools/testing/selftests/mm/cow.c                              | 1 -
>   tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>   tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>   tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>   tools/testing/selftests/mm/khugepaged.c                       | 1 -
>   tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>   tools/testing/selftests/mm/madv_populate.c                    | 1 -
>   tools/testing/selftests/mm/map_populate.c                     | 2 --
>   tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>   tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>   tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>   tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>   tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>   tools/testing/selftests/mm/mremap_test.c                      | 2 --
>   tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>   tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>   tools/testing/selftests/mm/protection_keys.c                  | 1 -
>   tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>   tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>   tools/testing/selftests/mm/uffd-common.h                      | 1 -
>   tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>   .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>   tools/testing/selftests/nci/Makefile                          | 2 +-
>   tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>   tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>   tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>   tools/testing/selftests/net/csum.c                            | 3 ---
>   tools/testing/selftests/net/gro.c                             | 3 ---
>   tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>   tools/testing/selftests/net/ipsec.c                           | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>   tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>   tools/testing/selftests/net/nettest.c                         | 2 --
>   tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>   tools/testing/selftests/net/psock_snd.c                       | 3 ---
>   tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>   tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>   tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>   tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>   tools/testing/selftests/net/so_txtime.c                       | 3 ---
>   tools/testing/selftests/net/tap.c                             | 3 ---
>   tools/testing/selftests/net/tcp_ao/Makefile                   | 2 +-
>   tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>   tools/testing/selftests/net/tcp_inq.c                         | 2 --
>   tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>   tools/testing/selftests/net/tls.c                             | 3 ---
>   tools/testing/selftests/net/toeplitz.c                        | 3 ---
>   tools/testing/selftests/net/tun.c                             | 3 ---
>   tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>   tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>   tools/testing/selftests/net/udpgso.c                          | 3 ---
>   tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>   tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>   tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>   tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>   tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>   tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>   tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>   tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>   tools/testing/selftests/prctl/Makefile                        | 2 ++
>   tools/testing/selftests/proc/Makefile                         | 2 +-
>   tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>   tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>   tools/testing/selftests/resctrl/Makefile                      | 2 +-
>   tools/testing/selftests/riscv/mm/Makefile                     | 2 +-
>   tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>   tools/testing/selftests/rseq/basic_test.c                     | 2 --
>   tools/testing/selftests/rseq/param_test.c                     | 1 -
>   tools/testing/selftests/rseq/rseq.c                           | 2 --
>   tools/testing/selftests/rtc/Makefile                          | 2 +-
>   tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>   tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>   tools/testing/selftests/sgx/Makefile                          | 2 +-
>   tools/testing/selftests/sgx/sigstruct.c                       | 1 -
>   tools/testing/selftests/tmpfs/Makefile                        | 2 +-
>   tools/testing/selftests/user_events/abi_test.c                | 2 --
>   tools/testing/selftests/x86/amx.c                             | 2 --
>   tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>   tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>   tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>   tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>   tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>   tools/testing/selftests/x86/ioperm.c                          | 2 --
>   tools/testing/selftests/x86/iopl.c                            | 2 --
>   tools/testing/selftests/x86/lam.c                             | 1 -
>   tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>   tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>   tools/testing/selftests/x86/nx_stack.c                        | 2 --
>   tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>   tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>   tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>   tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>   tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>   tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>   tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>   tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>   tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>   tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>   tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>   tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>   tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>   tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>   tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>   tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>   tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>   218 files changed, 20 insertions(+), 426 deletions(-)
> 
> --
> 2.45.0.rc1.225.g2a3ae87e7f-goog
> 
> 

thanks,
-- Shuah

_______________________________________________
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linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Shuah Khan]

On 5/7/24 15:38, Edward Liaw wrote:
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> location.  Remove #define _GNU_SOURCE from source code to resolve
> redefinition warnings.
> 
> Edward Liaw (5):
>    selftests: Compile kselftest headers with -D_GNU_SOURCE
>    selftests/sgx: Include KHDR_INCLUDES in Makefile

I appled patches 1/5 and 2.5 - The rest need to be split up.

>    selftests: Include KHDR_INCLUDES in Makefile
>    selftests: Drop define _GNU_SOURCE
>    selftests: Drop duplicate -D_GNU_SOURCE
> 

Please split these patches pwe test directory. Otherwise it will
cause merge conflicts which can be hard to resolve.

>   tools/testing/selftests/Makefile                              | 4 ++--
>   tools/testing/selftests/alsa/Makefile                         | 2 +-
>   tools/testing/selftests/arm64/signal/Makefile                 | 2 +-
>   tools/testing/selftests/cachestat/test_cachestat.c            | 2 --
>   tools/testing/selftests/capabilities/test_execve.c            | 2 --
>   tools/testing/selftests/clone3/clone3.c                       | 2 --
>   .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c  | 2 --
>   tools/testing/selftests/clone3/clone3_clear_sighand.c         | 2 --
>   tools/testing/selftests/clone3/clone3_selftests.h             | 1 -
>   tools/testing/selftests/clone3/clone3_set_tid.c               | 2 --
>   tools/testing/selftests/core/close_range_test.c               | 2 --
>   tools/testing/selftests/drivers/dma-buf/udmabuf.c             | 1 -
>   tools/testing/selftests/exec/Makefile                         | 2 +-
>   tools/testing/selftests/fchmodat2/fchmodat2_test.c            | 2 --
>   tools/testing/selftests/filesystems/binderfs/binderfs_test.c  | 2 --
>   tools/testing/selftests/filesystems/devpts_pts.c              | 1 -
>   tools/testing/selftests/filesystems/dnotify_test.c            | 1 -
>   tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c | 2 --
>   tools/testing/selftests/filesystems/eventfd/eventfd_test.c    | 2 --
>   tools/testing/selftests/filesystems/fat/rename_exchange.c     | 2 --
>   tools/testing/selftests/filesystems/overlayfs/Makefile        | 2 +-
>   tools/testing/selftests/filesystems/overlayfs/dev_in_maps.c   | 2 --
>   .../testing/selftests/filesystems/statmount/statmount_test.c  | 3 ---
>   tools/testing/selftests/futex/functional/Makefile             | 2 +-
>   tools/testing/selftests/futex/functional/futex_requeue_pi.c   | 3 ---
>   tools/testing/selftests/hid/Makefile                          | 2 +-
>   tools/testing/selftests/iommu/Makefile                        | 2 --
>   tools/testing/selftests/ipc/msgque.c                          | 1 -
>   tools/testing/selftests/kcmp/kcmp_test.c                      | 2 --
>   tools/testing/selftests/kselftest_harness.h                   | 2 +-
>   tools/testing/selftests/kvm/aarch64/arch_timer.c              | 2 --
>   tools/testing/selftests/kvm/aarch64/page_fault_test.c         | 1 -
>   tools/testing/selftests/kvm/aarch64/psci_test.c               | 3 ---
>   tools/testing/selftests/kvm/aarch64/vgic_init.c               | 1 -
>   tools/testing/selftests/kvm/arch_timer.c                      | 3 ---
>   tools/testing/selftests/kvm/demand_paging_test.c              | 3 ---
>   tools/testing/selftests/kvm/dirty_log_test.c                  | 3 ---
>   tools/testing/selftests/kvm/guest_memfd_test.c                | 2 --
>   tools/testing/selftests/kvm/hardware_disable_test.c           | 3 ---
>   tools/testing/selftests/kvm/include/userfaultfd_util.h        | 3 ---
>   tools/testing/selftests/kvm/kvm_binary_stats_test.c           | 2 --
>   tools/testing/selftests/kvm/kvm_create_max_vcpus.c            | 2 --
>   tools/testing/selftests/kvm/kvm_page_table_test.c             | 3 ---
>   tools/testing/selftests/kvm/lib/assert.c                      | 3 ---
>   tools/testing/selftests/kvm/lib/kvm_util.c                    | 2 --
>   tools/testing/selftests/kvm/lib/memstress.c                   | 2 --
>   tools/testing/selftests/kvm/lib/test_util.c                   | 2 --
>   tools/testing/selftests/kvm/lib/userfaultfd_util.c            | 3 ---
>   tools/testing/selftests/kvm/lib/x86_64/sev.c                  | 1 -
>   tools/testing/selftests/kvm/max_guest_memory_test.c           | 2 --
>   .../testing/selftests/kvm/memslot_modification_stress_test.c  | 3 ---
>   tools/testing/selftests/kvm/riscv/arch_timer.c                | 3 ---
>   tools/testing/selftests/kvm/rseq_test.c                       | 1 -
>   tools/testing/selftests/kvm/s390x/cmma_test.c                 | 2 --
>   tools/testing/selftests/kvm/s390x/sync_regs_test.c            | 2 --
>   tools/testing/selftests/kvm/set_memory_region_test.c          | 1 -
>   tools/testing/selftests/kvm/steal_time.c                      | 1 -
>   tools/testing/selftests/kvm/x86_64/amx_test.c                 | 2 --
>   .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c     | 3 ---
>   tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c            | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c             | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c             | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_ipi.c               | 2 --
>   tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c         | 2 --
>   tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c   | 2 --
>   tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/platform_info_test.c       | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_counters_test.c        | 2 --
>   tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c    | 3 ---
>   .../selftests/kvm/x86_64/private_mem_conversions_test.c       | 1 -
>   tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c          | 1 -
>   tools/testing/selftests/kvm/x86_64/set_sregs_test.c           | 1 -
>   .../selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c  | 3 ---
>   tools/testing/selftests/kvm/x86_64/smm_test.c                 | 1 -
>   tools/testing/selftests/kvm/x86_64/state_test.c               | 1 -
>   tools/testing/selftests/kvm/x86_64/sync_regs_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/ucna_injection_test.c      | 2 --
>   tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c  | 2 --
>   tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c       | 3 ---
>   tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c        | 1 -
>   .../testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c  | 1 -
>   tools/testing/selftests/kvm/x86_64/xapic_ipi_test.c           | 2 --
>   tools/testing/selftests/kvm/x86_64/xapic_state_test.c         | 1 -
>   tools/testing/selftests/kvm/x86_64/xss_msr_test.c             | 2 --
>   tools/testing/selftests/landlock/base_test.c                  | 2 --
>   tools/testing/selftests/landlock/fs_test.c                    | 2 --
>   tools/testing/selftests/landlock/net_test.c                   | 2 --
>   tools/testing/selftests/landlock/ptrace_test.c                | 2 --
>   tools/testing/selftests/lib.mk                                | 2 +-
>   tools/testing/selftests/lsm/common.c                          | 2 --
>   tools/testing/selftests/lsm/lsm_get_self_attr_test.c          | 2 --
>   tools/testing/selftests/lsm/lsm_list_modules_test.c           | 2 --
>   tools/testing/selftests/lsm/lsm_set_self_attr_test.c          | 2 --
>   tools/testing/selftests/membarrier/membarrier_test_impl.h     | 1 -
>   .../selftests/membarrier/membarrier_test_multi_thread.c       | 1 -
>   .../selftests/membarrier/membarrier_test_single_thread.c      | 1 -
>   tools/testing/selftests/memfd/common.c                        | 1 -
>   tools/testing/selftests/memfd/fuse_test.c                     | 2 --
>   tools/testing/selftests/memfd/memfd_test.c                    | 1 -
>   tools/testing/selftests/mm/cow.c                              | 1 -
>   tools/testing/selftests/mm/gup_longterm.c                     | 1 -
>   tools/testing/selftests/mm/hugepage-mmap.c                    | 1 -
>   tools/testing/selftests/mm/hugepage-mremap.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-madvise.c                  | 2 --
>   tools/testing/selftests/mm/hugetlb-read-hwpoison.c            | 2 --
>   tools/testing/selftests/mm/khugepaged.c                       | 1 -
>   tools/testing/selftests/mm/ksm_functional_tests.c             | 1 -
>   tools/testing/selftests/mm/madv_populate.c                    | 1 -
>   tools/testing/selftests/mm/map_populate.c                     | 2 --
>   tools/testing/selftests/mm/mdwe_test.c                        | 1 -
>   tools/testing/selftests/mm/memfd_secret.c                     | 2 --
>   tools/testing/selftests/mm/mlock2-tests.c                     | 1 -
>   tools/testing/selftests/mm/mrelease_test.c                    | 1 -
>   tools/testing/selftests/mm/mremap_dontunmap.c                 | 1 -
>   tools/testing/selftests/mm/mremap_test.c                      | 2 --
>   tools/testing/selftests/mm/pagemap_ioctl.c                    | 1 -
>   tools/testing/selftests/mm/pkey-helpers.h                     | 1 -
>   tools/testing/selftests/mm/protection_keys.c                  | 1 -
>   tools/testing/selftests/mm/split_huge_page_test.c             | 2 --
>   tools/testing/selftests/mm/thuge-gen.c                        | 2 --
>   tools/testing/selftests/mm/uffd-common.h                      | 1 -
>   tools/testing/selftests/mount_setattr/mount_setattr_test.c    | 1 -
>   .../move_mount_set_group/move_mount_set_group_test.c          | 1 -
>   tools/testing/selftests/nci/Makefile                          | 2 +-
>   tools/testing/selftests/net/af_unix/diag_uid.c                | 2 --
>   tools/testing/selftests/net/af_unix/scm_pidfd.c               | 1 -
>   tools/testing/selftests/net/af_unix/unix_connect.c            | 2 --
>   tools/testing/selftests/net/csum.c                            | 3 ---
>   tools/testing/selftests/net/gro.c                             | 3 ---
>   tools/testing/selftests/net/ip_defrag.c                       | 3 ---
>   tools/testing/selftests/net/ipsec.c                           | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel.c                  | 3 ---
>   tools/testing/selftests/net/ipv6_flowlabel_mgr.c              | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_connect.c             | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_inq.c                 | 3 ---
>   tools/testing/selftests/net/mptcp/mptcp_sockopt.c             | 3 ---
>   tools/testing/selftests/net/msg_zerocopy.c                    | 3 ---
>   tools/testing/selftests/net/nettest.c                         | 2 --
>   tools/testing/selftests/net/psock_fanout.c                    | 3 ---
>   tools/testing/selftests/net/psock_snd.c                       | 3 ---
>   tools/testing/selftests/net/reuseport_addr_any.c              | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_cpu.c               | 3 ---
>   tools/testing/selftests/net/reuseport_bpf_numa.c              | 3 ---
>   tools/testing/selftests/net/reuseport_dualstack.c             | 3 ---
>   tools/testing/selftests/net/so_incoming_cpu.c                 | 1 -
>   tools/testing/selftests/net/so_netns_cookie.c                 | 1 -
>   tools/testing/selftests/net/so_txtime.c                       | 3 ---
>   tools/testing/selftests/net/tap.c                             | 3 ---
>   tools/testing/selftests/net/tcp_ao/Makefile                   | 2 +-
>   tools/testing/selftests/net/tcp_fastopen_backup_key.c         | 1 -
>   tools/testing/selftests/net/tcp_inq.c                         | 2 --
>   tools/testing/selftests/net/tcp_mmap.c                        | 1 -
>   tools/testing/selftests/net/tls.c                             | 3 ---
>   tools/testing/selftests/net/toeplitz.c                        | 3 ---
>   tools/testing/selftests/net/tun.c                             | 3 ---
>   tools/testing/selftests/net/txring_overwrite.c                | 3 ---
>   tools/testing/selftests/net/txtimestamp.c                     | 3 ---
>   tools/testing/selftests/net/udpgso.c                          | 3 ---
>   tools/testing/selftests/net/udpgso_bench_rx.c                 | 3 ---
>   tools/testing/selftests/net/udpgso_bench_tx.c                 | 3 ---
>   tools/testing/selftests/perf_events/remove_on_exec.c          | 2 --
>   tools/testing/selftests/perf_events/sigtrap_threads.c         | 2 --
>   tools/testing/selftests/pid_namespace/regression_enomem.c     | 1 -
>   tools/testing/selftests/pidfd/pidfd.h                         | 1 -
>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c             | 2 --
>   tools/testing/selftests/pidfd/pidfd_getfd_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_open_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_poll_test.c               | 2 --
>   tools/testing/selftests/pidfd/pidfd_setns_test.c              | 2 --
>   tools/testing/selftests/pidfd/pidfd_test.c                    | 2 --
>   tools/testing/selftests/pidfd/pidfd_wait.c                    | 2 --
>   tools/testing/selftests/prctl/Makefile                        | 2 ++
>   tools/testing/selftests/proc/Makefile                         | 2 +-
>   tools/testing/selftests/ptrace/get_set_sud.c                  | 1 -
>   tools/testing/selftests/ptrace/peeksiginfo.c                  | 1 -
>   tools/testing/selftests/resctrl/Makefile                      | 2 +-
>   tools/testing/selftests/riscv/mm/Makefile                     | 2 +-
>   tools/testing/selftests/rseq/basic_percpu_ops_test.c          | 1 -
>   tools/testing/selftests/rseq/basic_test.c                     | 2 --
>   tools/testing/selftests/rseq/param_test.c                     | 1 -
>   tools/testing/selftests/rseq/rseq.c                           | 2 --
>   tools/testing/selftests/rtc/Makefile                          | 2 +-
>   tools/testing/selftests/seccomp/seccomp_benchmark.c           | 1 -
>   tools/testing/selftests/seccomp/seccomp_bpf.c                 | 2 --
>   tools/testing/selftests/sgx/Makefile                          | 2 +-
>   tools/testing/selftests/sgx/sigstruct.c                       | 1 -
>   tools/testing/selftests/tmpfs/Makefile                        | 2 +-
>   tools/testing/selftests/user_events/abi_test.c                | 2 --
>   tools/testing/selftests/x86/amx.c                             | 2 --
>   tools/testing/selftests/x86/check_initial_reg_state.c         | 3 ---
>   tools/testing/selftests/x86/corrupt_xstate_header.c           | 3 ---
>   tools/testing/selftests/x86/entry_from_vm86.c                 | 3 ---
>   tools/testing/selftests/x86/fsgsbase.c                        | 2 --
>   tools/testing/selftests/x86/fsgsbase_restore.c                | 2 --
>   tools/testing/selftests/x86/ioperm.c                          | 2 --
>   tools/testing/selftests/x86/iopl.c                            | 2 --
>   tools/testing/selftests/x86/lam.c                             | 1 -
>   tools/testing/selftests/x86/ldt_gdt.c                         | 2 --
>   tools/testing/selftests/x86/mov_ss_trap.c                     | 2 --
>   tools/testing/selftests/x86/nx_stack.c                        | 2 --
>   tools/testing/selftests/x86/ptrace_syscall.c                  | 2 --
>   tools/testing/selftests/x86/sigaltstack.c                     | 2 --
>   tools/testing/selftests/x86/sigreturn.c                       | 3 ---
>   tools/testing/selftests/x86/single_step_syscall.c             | 3 ---
>   tools/testing/selftests/x86/syscall_arg_fault.c               | 3 ---
>   tools/testing/selftests/x86/syscall_numbering.c               | 3 ---
>   tools/testing/selftests/x86/sysret_rip.c                      | 3 ---
>   tools/testing/selftests/x86/sysret_ss_attrs.c                 | 3 ---
>   tools/testing/selftests/x86/test_FCMOV.c                      | 4 ----
>   tools/testing/selftests/x86/test_FCOMI.c                      | 4 ----
>   tools/testing/selftests/x86/test_FISTTP.c                     | 4 ----
>   tools/testing/selftests/x86/test_mremap_vdso.c                | 1 -
>   tools/testing/selftests/x86/test_shadow_stack.c               | 3 ---
>   tools/testing/selftests/x86/test_syscall_vdso.c               | 4 ----
>   tools/testing/selftests/x86/test_vsyscall.c                   | 3 ---
>   tools/testing/selftests/x86/unwind_vdso.c                     | 3 ---
>   tools/testing/selftests/x86/vdso_restorer.c                   | 3 ---
>   218 files changed, 20 insertions(+), 426 deletions(-)
> 
> --
> 2.45.0.rc1.225.g2a3ae87e7f-goog
> 
> 

thanks,
-- Shuah

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 5/7/24 15:38, Edward Liaw wrote:
> > 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> > asprintf into kselftest_harness.h, which is a GNU extension and needs
> > _GNU_SOURCE to either be defined prior to including headers or with the
> > -D_GNU_SOURCE flag passed to the compiler.
> >
> > v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> > v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> > location.  Remove #define _GNU_SOURCE from source code to resolve
> > redefinition warnings.
> >
> > Edward Liaw (5):
> >    selftests: Compile kselftest headers with -D_GNU_SOURCE
> >    selftests/sgx: Include KHDR_INCLUDES in Makefile
>
> I appled patches 1/5 and 2.5 - The rest need to be split up.
>
> >    selftests: Include KHDR_INCLUDES in Makefile
> >    selftests: Drop define _GNU_SOURCE
> >    selftests: Drop duplicate -D_GNU_SOURCE
> >
>
> Please split these patches pwe test directory. Otherwise it will
> cause merge conflicts which can be hard to resolve.

Hi Shuah,
Sean asked that I rebase the patches on linux-next, and I will need to
remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
be reviewed, then split it afterwards?  I'm concerned that it will be
difficult to review with ~70 patches once split.

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 5/7/24 15:38, Edward Liaw wrote:
> > 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> > asprintf into kselftest_harness.h, which is a GNU extension and needs
> > _GNU_SOURCE to either be defined prior to including headers or with the
> > -D_GNU_SOURCE flag passed to the compiler.
> >
> > v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> > v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> > location.  Remove #define _GNU_SOURCE from source code to resolve
> > redefinition warnings.
> >
> > Edward Liaw (5):
> >    selftests: Compile kselftest headers with -D_GNU_SOURCE
> >    selftests/sgx: Include KHDR_INCLUDES in Makefile
>
> I appled patches 1/5 and 2.5 - The rest need to be split up.
>
> >    selftests: Include KHDR_INCLUDES in Makefile
> >    selftests: Drop define _GNU_SOURCE
> >    selftests: Drop duplicate -D_GNU_SOURCE
> >
>
> Please split these patches pwe test directory. Otherwise it will
> cause merge conflicts which can be hard to resolve.

Hi Shuah,
Sean asked that I rebase the patches on linux-next, and I will need to
remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
be reviewed, then split it afterwards?  I'm concerned that it will be
difficult to review with ~70 patches once split.

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Wed, May 8, 2024 at 4:10?PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 5/7/24 15:38, Edward Liaw wrote:
> > 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> > asprintf into kselftest_harness.h, which is a GNU extension and needs
> > _GNU_SOURCE to either be defined prior to including headers or with the
> > -D_GNU_SOURCE flag passed to the compiler.
> >
> > v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
> > v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> > location.  Remove #define _GNU_SOURCE from source code to resolve
> > redefinition warnings.
> >
> > Edward Liaw (5):
> >    selftests: Compile kselftest headers with -D_GNU_SOURCE
> >    selftests/sgx: Include KHDR_INCLUDES in Makefile
>
> I appled patches 1/5 and 2.5 - The rest need to be split up.
>
> >    selftests: Include KHDR_INCLUDES in Makefile
> >    selftests: Drop define _GNU_SOURCE
> >    selftests: Drop duplicate -D_GNU_SOURCE
> >
>
> Please split these patches pwe test directory. Otherwise it will
> cause merge conflicts which can be hard to resolve.

Hi Shuah,
Sean asked that I rebase the patches on linux-next, and I will need to
remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
be reviewed, then split it afterwards?  I'm concerned that it will be
difficult to review with ~70 patches once split.

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Shuah Khan]

On 5/9/24 00:13, Edward Liaw wrote:
> On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 5/7/24 15:38, Edward Liaw wrote:
>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>> _GNU_SOURCE to either be defined prior to including headers or with the
>>> -D_GNU_SOURCE flag passed to the compiler.
>>>
>>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
>>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>>> location.  Remove #define _GNU_SOURCE from source code to resolve
>>> redefinition warnings.
>>>
>>> Edward Liaw (5):
>>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
>>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
>>
>> I appled patches 1/5 and 2.5 - The rest need to be split up.
>>
>>>     selftests: Include KHDR_INCLUDES in Makefile
>>>     selftests: Drop define _GNU_SOURCE
>>>     selftests: Drop duplicate -D_GNU_SOURCE
>>>
>>
>> Please split these patches pwe test directory. Otherwise it will
>> cause merge conflicts which can be hard to resolve.
> 
> Hi Shuah,
> Sean asked that I rebase the patches on linux-next, and I will need to
> remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
> be reviewed, then split it afterwards?  I'm concerned that it will be
> difficult to review with ~70 patches once split.

Please send them split - it will be easier to review and apply. You
might as well wait until the merge window is done. I don't think
anybody would have time to review now since merge window starts
next week.


thanks,
-- Shuah

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Shuah Khan]

On 5/9/24 00:13, Edward Liaw wrote:
> On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 5/7/24 15:38, Edward Liaw wrote:
>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>> _GNU_SOURCE to either be defined prior to including headers or with the
>>> -D_GNU_SOURCE flag passed to the compiler.
>>>
>>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
>>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>>> location.  Remove #define _GNU_SOURCE from source code to resolve
>>> redefinition warnings.
>>>
>>> Edward Liaw (5):
>>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
>>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
>>
>> I appled patches 1/5 and 2.5 - The rest need to be split up.
>>
>>>     selftests: Include KHDR_INCLUDES in Makefile
>>>     selftests: Drop define _GNU_SOURCE
>>>     selftests: Drop duplicate -D_GNU_SOURCE
>>>
>>
>> Please split these patches pwe test directory. Otherwise it will
>> cause merge conflicts which can be hard to resolve.
> 
> Hi Shuah,
> Sean asked that I rebase the patches on linux-next, and I will need to
> remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
> be reviewed, then split it afterwards?  I'm concerned that it will be
> difficult to review with ~70 patches once split.

Please send them split - it will be easier to review and apply. You
might as well wait until the merge window is done. I don't think
anybody would have time to review now since merge window starts
next week.


thanks,
-- Shuah

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Shuah Khan]

On 5/9/24 00:13, Edward Liaw wrote:
> On Wed, May 8, 2024 at 4:10?PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 5/7/24 15:38, Edward Liaw wrote:
>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>> _GNU_SOURCE to either be defined prior to including headers or with the
>>> -D_GNU_SOURCE flag passed to the compiler.
>>>
>>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
>>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>>> location.  Remove #define _GNU_SOURCE from source code to resolve
>>> redefinition warnings.
>>>
>>> Edward Liaw (5):
>>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
>>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
>>
>> I appled patches 1/5 and 2.5 - The rest need to be split up.
>>
>>>     selftests: Include KHDR_INCLUDES in Makefile
>>>     selftests: Drop define _GNU_SOURCE
>>>     selftests: Drop duplicate -D_GNU_SOURCE
>>>
>>
>> Please split these patches pwe test directory. Otherwise it will
>> cause merge conflicts which can be hard to resolve.
> 
> Hi Shuah,
> Sean asked that I rebase the patches on linux-next, and I will need to
> remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
> be reviewed, then split it afterwards?  I'm concerned that it will be
> difficult to review with ~70 patches once split.

Please send them split - it will be easier to review and apply. You
might as well wait until the merge window is done. I don't think
anybody would have time to review now since merge window starts
next week.


thanks,
-- Shuah

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Thu, May 9, 2024 at 7:37 AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 5/9/24 00:13, Edward Liaw wrote:
> > On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
> >>
> >> On 5/7/24 15:38, Edward Liaw wrote:
> >>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> >>> asprintf into kselftest_harness.h, which is a GNU extension and needs
> >>> _GNU_SOURCE to either be defined prior to including headers or with the
> >>> -D_GNU_SOURCE flag passed to the compiler.
> >>>
> >>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> >>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> >>> location.  Remove #define _GNU_SOURCE from source code to resolve
> >>> redefinition warnings.
> >>>
> >>> Edward Liaw (5):
> >>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
> >>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
> >>
> >> I appled patches 1/5 and 2.5 - The rest need to be split up.
> >>
> >>>     selftests: Include KHDR_INCLUDES in Makefile
> >>>     selftests: Drop define _GNU_SOURCE
> >>>     selftests: Drop duplicate -D_GNU_SOURCE
> >>>
> >>
> >> Please split these patches pwe test directory. Otherwise it will
> >> cause merge conflicts which can be hard to resolve.
> >
> > Hi Shuah,
> > Sean asked that I rebase the patches on linux-next, and I will need to
> > remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
> > be reviewed, then split it afterwards?  I'm concerned that it will be
> > difficult to review with ~70 patches once split.
>
> Please send them split - it will be easier to review and apply. You
> might as well wait until the merge window is done. I don't think
> anybody would have time to review now since merge window starts
> next week.

Sorry, I have them split already; is it ok if I send them now?  I will
be on leave soon and may not be able to get back to it in a while.

Thanks,
Edward

>
>
> thanks,
> -- Shuah

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Thu, May 9, 2024 at 7:37 AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 5/9/24 00:13, Edward Liaw wrote:
> > On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
> >>
> >> On 5/7/24 15:38, Edward Liaw wrote:
> >>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> >>> asprintf into kselftest_harness.h, which is a GNU extension and needs
> >>> _GNU_SOURCE to either be defined prior to including headers or with the
> >>> -D_GNU_SOURCE flag passed to the compiler.
> >>>
> >>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> >>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> >>> location.  Remove #define _GNU_SOURCE from source code to resolve
> >>> redefinition warnings.
> >>>
> >>> Edward Liaw (5):
> >>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
> >>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
> >>
> >> I appled patches 1/5 and 2.5 - The rest need to be split up.
> >>
> >>>     selftests: Include KHDR_INCLUDES in Makefile
> >>>     selftests: Drop define _GNU_SOURCE
> >>>     selftests: Drop duplicate -D_GNU_SOURCE
> >>>
> >>
> >> Please split these patches pwe test directory. Otherwise it will
> >> cause merge conflicts which can be hard to resolve.
> >
> > Hi Shuah,
> > Sean asked that I rebase the patches on linux-next, and I will need to
> > remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
> > be reviewed, then split it afterwards?  I'm concerned that it will be
> > difficult to review with ~70 patches once split.
>
> Please send them split - it will be easier to review and apply. You
> might as well wait until the merge window is done. I don't think
> anybody would have time to review now since merge window starts
> next week.

Sorry, I have them split already; is it ok if I send them now?  I will
be on leave soon and may not be able to get back to it in a while.

Thanks,
Edward

>
>
> thanks,
> -- Shuah

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linux-riscv mailing list
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[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Edward Liaw]

On Thu, May 9, 2024 at 7:37?AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 5/9/24 00:13, Edward Liaw wrote:
> > On Wed, May 8, 2024 at 4:10?PM Shuah Khan <skhan@linuxfoundation.org> wrote:
> >>
> >> On 5/7/24 15:38, Edward Liaw wrote:
> >>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> >>> asprintf into kselftest_harness.h, which is a GNU extension and needs
> >>> _GNU_SOURCE to either be defined prior to including headers or with the
> >>> -D_GNU_SOURCE flag passed to the compiler.
> >>>
> >>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
> >>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
> >>> location.  Remove #define _GNU_SOURCE from source code to resolve
> >>> redefinition warnings.
> >>>
> >>> Edward Liaw (5):
> >>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
> >>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
> >>
> >> I appled patches 1/5 and 2.5 - The rest need to be split up.
> >>
> >>>     selftests: Include KHDR_INCLUDES in Makefile
> >>>     selftests: Drop define _GNU_SOURCE
> >>>     selftests: Drop duplicate -D_GNU_SOURCE
> >>>
> >>
> >> Please split these patches pwe test directory. Otherwise it will
> >> cause merge conflicts which can be hard to resolve.
> >
> > Hi Shuah,
> > Sean asked that I rebase the patches on linux-next, and I will need to
> > remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
> > be reviewed, then split it afterwards?  I'm concerned that it will be
> > difficult to review with ~70 patches once split.
>
> Please send them split - it will be easier to review and apply. You
> might as well wait until the merge window is done. I don't think
> anybody would have time to review now since merge window starts
> next week.

Sorry, I have them split already; is it ok if I send them now?  I will
be on leave soon and may not be able to get back to it in a while.

Thanks,
Edward

>
>
> thanks,
> -- Shuah

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Muhammad Usama Anjum]

On 5/9/24 10:45 PM, Edward Liaw wrote:
> On Thu, May 9, 2024 at 7:37 AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 5/9/24 00:13, Edward Liaw wrote:
>>> On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>>>
>>>> On 5/7/24 15:38, Edward Liaw wrote:
>>>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>>>> _GNU_SOURCE to either be defined prior to including headers or with the
>>>>> -D_GNU_SOURCE flag passed to the compiler.
>>>>>
>>>>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
>>>>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>>>>> location.  Remove #define _GNU_SOURCE from source code to resolve
>>>>> redefinition warnings.
>>>>>
>>>>> Edward Liaw (5):
>>>>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
>>>>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
>>>>
>>>> I appled patches 1/5 and 2.5 - The rest need to be split up.
>>>>
>>>>>     selftests: Include KHDR_INCLUDES in Makefile
>>>>>     selftests: Drop define _GNU_SOURCE
>>>>>     selftests: Drop duplicate -D_GNU_SOURCE
>>>>>
>>>>
>>>> Please split these patches pwe test directory. Otherwise it will
>>>> cause merge conflicts which can be hard to resolve.
>>>
>>> Hi Shuah,
>>> Sean asked that I rebase the patches on linux-next, and I will need to
>>> remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
>>> be reviewed, then split it afterwards?  I'm concerned that it will be
>>> difficult to review with ~70 patches once split.
>>
>> Please send them split - it will be easier to review and apply. You
>> might as well wait until the merge window is done. I don't think
>> anybody would have time to review now since merge window starts
>> next week.
> 
> Sorry, I have them split already; is it ok if I send them now?  I will
> be on leave soon and may not be able to get back to it in a while.
Feel free to send the patches. There is no restriction on that.

> 
> Thanks,
> Edward
> 
>>
>>
>> thanks,
>> -- Shuah
> 

-- 
BR,
Muhammad Usama Anjum

Re: [PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Muhammad Usama Anjum]

On 5/9/24 10:45 PM, Edward Liaw wrote:
> On Thu, May 9, 2024 at 7:37 AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 5/9/24 00:13, Edward Liaw wrote:
>>> On Wed, May 8, 2024 at 4:10 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>>>
>>>> On 5/7/24 15:38, Edward Liaw wrote:
>>>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>>>> _GNU_SOURCE to either be defined prior to including headers or with the
>>>>> -D_GNU_SOURCE flag passed to the compiler.
>>>>>
>>>>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
>>>>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>>>>> location.  Remove #define _GNU_SOURCE from source code to resolve
>>>>> redefinition warnings.
>>>>>
>>>>> Edward Liaw (5):
>>>>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
>>>>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
>>>>
>>>> I appled patches 1/5 and 2.5 - The rest need to be split up.
>>>>
>>>>>     selftests: Include KHDR_INCLUDES in Makefile
>>>>>     selftests: Drop define _GNU_SOURCE
>>>>>     selftests: Drop duplicate -D_GNU_SOURCE
>>>>>
>>>>
>>>> Please split these patches pwe test directory. Otherwise it will
>>>> cause merge conflicts which can be hard to resolve.
>>>
>>> Hi Shuah,
>>> Sean asked that I rebase the patches on linux-next, and I will need to
>>> remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
>>> be reviewed, then split it afterwards?  I'm concerned that it will be
>>> difficult to review with ~70 patches once split.
>>
>> Please send them split - it will be easier to review and apply. You
>> might as well wait until the merge window is done. I don't think
>> anybody would have time to review now since merge window starts
>> next week.
> 
> Sorry, I have them split already; is it ok if I send them now?  I will
> be on leave soon and may not be able to get back to it in a while.
Feel free to send the patches. There is no restriction on that.

> 
> Thanks,
> Edward
> 
>>
>>
>> thanks,
>> -- Shuah
> 

-- 
BR,
Muhammad Usama Anjum

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

[PATCH v2 0/5] Define _GNU_SOURCE for sources using

[Muhammad Usama Anjum]

On 5/9/24 10:45 PM, Edward Liaw wrote:
> On Thu, May 9, 2024 at 7:37?AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 5/9/24 00:13, Edward Liaw wrote:
>>> On Wed, May 8, 2024 at 4:10?PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>>>
>>>> On 5/7/24 15:38, Edward Liaw wrote:
>>>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>>>> _GNU_SOURCE to either be defined prior to including headers or with the
>>>>> -D_GNU_SOURCE flag passed to the compiler.
>>>>>
>>>>> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw at google.com/
>>>>> v2: add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>>>>> location.  Remove #define _GNU_SOURCE from source code to resolve
>>>>> redefinition warnings.
>>>>>
>>>>> Edward Liaw (5):
>>>>>     selftests: Compile kselftest headers with -D_GNU_SOURCE
>>>>>     selftests/sgx: Include KHDR_INCLUDES in Makefile
>>>>
>>>> I appled patches 1/5 and 2.5 - The rest need to be split up.
>>>>
>>>>>     selftests: Include KHDR_INCLUDES in Makefile
>>>>>     selftests: Drop define _GNU_SOURCE
>>>>>     selftests: Drop duplicate -D_GNU_SOURCE
>>>>>
>>>>
>>>> Please split these patches pwe test directory. Otherwise it will
>>>> cause merge conflicts which can be hard to resolve.
>>>
>>> Hi Shuah,
>>> Sean asked that I rebase the patches on linux-next, and I will need to
>>> remove additional _GNU_SOURCE defines.  Should I send an unsplit v3 to
>>> be reviewed, then split it afterwards?  I'm concerned that it will be
>>> difficult to review with ~70 patches once split.
>>
>> Please send them split - it will be easier to review and apply. You
>> might as well wait until the merge window is done. I don't think
>> anybody would have time to review now since merge window starts
>> next week.
> 
> Sorry, I have them split already; is it ok if I send them now?  I will
> be on leave soon and may not be able to get back to it in a while.
Feel free to send the patches. There is no restriction on that.

> 
> Thanks,
> Edward
> 
>>
>>
>> thanks,
>> -- Shuah
> 

-- 
BR,
Muhammad Usama Anjum