[PATCH bpf-next v2 18/26] rqspinlock: Add entry to Makefile, MAINTAINERS

Kumar Kartikeya Dwivedi
2025-02-06T10:55:04Z

Ensure that rqspinlock is built when qspinlock support and BPF subsystem
is enabled. Also, add the file under the BPF MAINTAINERS entry so that
all patches changing code in the file end up Cc'ing bpf@vger and the
maintainers/reviewers.

Ensure that the rqspinlock code is only built when the BPF subsystem is
compiled in. Depending on queued spinlock support, we may or may not end
up building the queued spinlock slowpath, and instead fallback to the
test-and-set implementation.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
MAINTAINERS | 3 +++
include/asm-generic/Kbuild | 1 +
kernel/locking/Makefile | 1 +
3 files changed, 5 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 896a307fa065..4d81f3303c79 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4305,6 +4305,9 @@ F: include/uapi/linux/filter.h
F: kernel/bpf/
F: kernel/trace/bpf_trace.c
F: lib/buildid.c
+F: arch/*/include/asm/rqspinlock.h
+F: include/asm-generic/rqspinlock.h
+F: kernel/locking/rqspinlock.c
F: lib/test_bpf.c
F: net/bpf/
F: net/core/filter.c
diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
index 1b43c3a77012..8675b7b4ad23 100644
--- a/include/asm-generic/Kbuild
+++ b/include/asm-generic/Kbuild
@@ -45,6 +45,7 @@ mandatory-y += pci.h
mandatory-y += percpu.h
mandatory-y += pgalloc.h
mandatory-y += preempt.h
+mandatory-y += rqspinlock.h
mandatory-y += runtime-const.h
mandatory-y += rwonce.h
mandatory-y += sections.h
diff --git a/kernel/locking/Makefile b/kernel/locking/Makefile
index 0db4093d17b8..5645e9029bc0 100644
--- a/kernel/locking/Makefile
+++ b/kernel/locking/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_SMP) += spinlock.o
obj-$(CONFIG_LOCK_SPIN_ON_OWNER) += osq_lock.o
obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
obj-$(CONFIG_QUEUED_SPINLOCKS) += qspinlock.o
+obj-$(CONFIG_BPF_SYSCALL) += rqspinlock.o
obj-$(CONFIG_RT_MUTEXES) += rtmutex_api.o
obj-$(CONFIG_PREEMPT_RT) += spinlock_rt.o ww_rt_mutex.o
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
--
2.43.5