linux-kernel - [PATCH] selftests/bpf: Fix the address is NULL

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Date:   Wed, 14 Jun 2023 15:42:34 +0800
From:   wuyonggang001@...suo.com
To:     andrii@...nel.org, shuah@...nel.org
Cc:     bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/bpf: Fix the address is NULL

Fix the following coccicheck error:

tools/testing/selftests/bpf/progs/test_ksyms_weak.c:53:6-20: ERROR: test 
of a variable/field address

Signed-off-by: Yonggang Wu <wuyonggang001@...suo.com>
---
  tools/testing/selftests/bpf/progs/test_ksyms_weak.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/test_ksyms_weak.c 
b/tools/testing/selftests/bpf/progs/test_ksyms_weak.c
index d00268c91e19..768a4d6ee6f5 100644
--- a/tools/testing/selftests/bpf/progs/test_ksyms_weak.c
+++ b/tools/testing/selftests/bpf/progs/test_ksyms_weak.c
@@ -50,7 +50,7 @@ int pass_handler(const void *ctx)
      /* tests non-existent symbols. */
      out__non_existent_typed = (__u64)&bpf_link_fops2;

-    if (&bpf_link_fops2) /* can't happen */
+    if (&bpf_link_fops2 != NULL) /* can't happen */
          out__non_existent_typed = 
(__u64)bpf_per_cpu_ptr(&bpf_link_fops2, 0);

      if (!bpf_ksym_exists(bpf_task_acquire))