[PATCH bpf 2/2] bpf: Remove obsolete WARN_ON call

[Jiri Olsa <jolsa@kernel.org>]

The WARN_ON call in bpf_trampoline_update could never hit, because we
direct the code path with (total == 0) to out label, which effectively
skips the WARN_ON call.

The WARN_ON made sense back then when it checked tr->selector, but now
with total being set just inside the function it's useless.

Cc: stable@vger.kernel.org
Fixes: 47e79cbeea4b ("bpf: Remove bpf trampoline selector")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 kernel/bpf/trampoline.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c
index 01082ecc5c4f..c09d64b83fa4 100644
--- a/kernel/bpf/trampoline.c
+++ b/kernel/bpf/trampoline.c
@@ -687,7 +687,6 @@ static int bpf_trampoline_update(struct bpf_trampoline *tr, bool lock_direct_mut
 	if (err)
 		goto out_free;
 
-	WARN_ON(tr->cur_image && total == 0);
 	if (tr->cur_image)
 		/* progs already running at this address */
 		err = modify_fentry(tr, orig_flags, tr->cur_image->image,
-- 
2.53.0