pull-request: bpf 2019-12-11

[Alexei Starovoitov <ast@kernel.org>]

Hi David,

The following pull-request contains BPF updates for your *net* tree.

We've added 8 non-merge commits during the last 1 day(s) which contain
a total of 10 files changed, 126 insertions(+), 18 deletions(-).

The main changes are:

1) Make BPF trampoline co-exist with ftrace-based tracers, from Alexei.

2) Fix build in minimal configurations, from Arnd.

3) Fix mips, riscv bpf_tail_call limit, from Paul.

4) Fix bpftool segfault, from Toke.

5) Fix samples/bpf, from Daniel.

Please consider pulling these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git

Thanks a lot!

Also thanks to reporters, reviewers and testers of commits in this pull-request:

Björn Töpel, Daniel Borkmann, Mahshid Khezri, Martin KaFai Lau

----------------------------------------------------------------

The following changes since commit 24dee0c7478d1a1e00abdf5625b7f921467325dc:

  net: ena: fix napi handler misbehavior when the napi budget is zero (2019-12-10 17:54:55 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git 

for you to fetch changes up to fe3300897cbfd76c6cb825776e5ac0ca50a91ca4:

  samples: bpf: fix syscall_tp due to unused syscall (2019-12-11 15:28:06 -0800)

----------------------------------------------------------------
Alexei Starovoitov (2):
      bpf: Make BPF trampoline use register_ftrace_direct() API
      selftests/bpf: Test function_graph tracer and bpf trampoline together

Arnd Bergmann (1):
      bpf: Fix build in minimal configurations, again

Daniel T. Lee (2):
      samples: bpf: Replace symbol compare of trace_event
      samples: bpf: fix syscall_tp due to unused syscall

Paul Chaignon (2):
      bpf, riscv: Limit to 33 tail calls
      bpf, mips: Limit to 33 tail calls

Toke Høiland-Jørgensen (1):
      bpftool: Don't crash on missing jited insns or ksyms

 arch/mips/net/ebpf_jit.c                   |  9 +++--
 arch/riscv/net/bpf_jit_comp.c              |  4 +-
 include/linux/bpf.h                        |  1 +
 kernel/bpf/btf.c                           |  1 +
 kernel/bpf/trampoline.c                    | 64 +++++++++++++++++++++++++++---
 samples/bpf/syscall_tp_kern.c              | 18 ++++++++-
 samples/bpf/trace_event_user.c             |  4 +-
 tools/bpf/bpftool/prog.c                   |  2 +-
 tools/bpf/bpftool/xlated_dumper.c          |  2 +-
 tools/testing/selftests/bpf/test_ftrace.sh | 39 ++++++++++++++++++
 10 files changed, 126 insertions(+), 18 deletions(-)
 create mode 100755 tools/testing/selftests/bpf/test_ftrace.sh