Commit a828abbb authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Alexei Starovoitov
Browse files

bpf: make bpf_session_is_return() reference optional 



Building without CONFIG_BPF_EVENTS produces a build-time
warning:

WARN: resolve_btfids: unresolved symbol bpf_session_is_return

The function is actually defined in kernel/trace/bpf_trace.o,
which is built conditionally based on configuration.

Make the reference to this function conditional as well,
as is already done in the bpf verifier for other functions.

Fixes: 8fe4dc4f ("bpf: change prototype of bpf_session_{cookie,is_return}")
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20260515113242.2706303-1-arnd@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 59398017

kernel/bpf/verifier.c

+4 −0
Original line number Diff line number Diff line
@@ -11263,7 +11263,11 @@ BTF_ID(func, bpf_task_work_schedule_resume) 
BTF_ID(func, bpf_arena_alloc_pages)

BTF_ID(func, bpf_arena_free_pages)

BTF_ID(func, bpf_arena_reserve_pages)

#ifdef CONFIG_BPF_EVENTS

BTF_ID(func, bpf_session_is_return)

#else

BTF_ID_UNUSED

#endif

BTF_ID(func, bpf_stream_vprintk)

BTF_ID(func, bpf_stream_print_stack)