[PATCH] bpf: fix warning comparing pointer to 0

Fix the following coccicheck warning:

./tools/testing/selftests/bpf/progs/fentry_test.c:67:12-13: WARNING
comparing pointer to 0.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Jiapeng Chong <redacted>
---
 tools/testing/selftests/bpf/progs/fentry_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/fentry_test.c b/tools/testing/selftests/bpf/progs/fentry_test.c
index 5f645fd..52a550d 100644
--- a/tools/testing/selftests/bpf/progs/fentry_test.c
+++ b/tools/testing/selftests/bpf/progs/fentry_test.c

@@ -64,7 +64,7 @@ struct bpf_fentry_test_t {
 SEC("fentry/bpf_fentry_test7")
 int BPF_PROG(test7, struct bpf_fentry_test_t *arg)
 {
-	if (arg == 0)
+	if (!arg)
 		test7_result = 1;
 	return 0;
 }

-- 
1.8.3.1

Hello:

This patch was applied to bpf/bpf-next.git (refs/heads/master):

On Wed, 10 Mar 2021 15:18:34 +0800 you wrote:

Fix the following coccicheck warning:

./tools/testing/selftests/bpf/progs/fentry_test.c:67:12-13: WARNING
comparing pointer to 0.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Jiapeng Chong <redacted>

[...]

Here is the summary with links:
  - bpf: fix warning comparing pointer to 0
    https://git.kernel.org/bpf/bpf-next/c/a9c80b03e586

You are awesome, thank you!
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