Messages in this thread Patch in this message | | | From | Jules Irenge <> | Subject | [PATCH 1/8] bpf: Add missing annotations for __bpf_prog_enter() and __bpf_prog_exit() | Date | Wed, 11 Mar 2020 01:09:01 +0000 |
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Sparse reports a warning at __bpf_prog_enter() and __bpf_prog_exit()
warning: context imbalance in __bpf_prog_enter() - wrong count at exit warning: context imbalance in __bpf_prog_exit() - unexpected unlock
The root cause is the missing annotation at __bpf_prog_enter() and __bpf_prog_exit()
Add the missing __acquires(RCU) annotation Add the missing __releases(RCU) annotation
Signed-off-by: Jules Irenge <jbi.octave@gmail.com> --- kernel/bpf/trampoline.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c index 6b264a92064b..09bce10ad1cc 100644 --- a/kernel/bpf/trampoline.c +++ b/kernel/bpf/trampoline.c @@ -374,6 +374,7 @@ void bpf_trampoline_put(struct bpf_trampoline *tr) * call __bpf_prog_exit */ u64 notrace __bpf_prog_enter(void) + __acquires(RCU) { u64 start = 0; @@ -385,6 +386,7 @@ u64 notrace __bpf_prog_enter(void) } void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start) + __releases(RCU) { struct bpf_prog_stats *stats; -- 2.24.1
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