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From:   Haowen Bai <baihaowen@meizu.com>
To:     Shuah Khan <shuah@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
        "Daniel Borkmann" <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        "Martin KaFai Lau" <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>
CC:     Haowen Bai <baihaowen@meizu.com>,
        <linux-kselftest@vger.kernel.org>, <netdev@vger.kernel.org>,
        <bpf@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH V2] selftests/bpf: Fix warning comparing pointer to 0
Date:   Wed, 30 Mar 2022 09:59:48 +0800
Message-ID: <1648605588-19269-1-git-send-email-baihaowen@meizu.com>
In-Reply-To: <29503ac1-69ab-a0b7-53bc-5a7522baa289@linuxfoundation.org>
References: <29503ac1-69ab-a0b7-53bc-5a7522baa289@linuxfoundation.org>
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Avoid pointer type value compared with 0 to make code clear.

reported by coccicheck:
tools/testing/selftests/bpf/progs/map_ptr_kern.c:370:21-22:
WARNING comparing pointer to 0
tools/testing/selftests/bpf/progs/map_ptr_kern.c:397:21-22:
WARNING comparing pointer to 0

Signed-off-by: Haowen Bai <baihaowen@meizu.com>
---
V1->V2: include the error/warn message.

 tools/testing/selftests/bpf/progs/map_ptr_kern.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/map_ptr_kern.c b/tools/testing/selftests/bpf/progs/map_ptr_kern.c
index b64df94..db388f5 100644
--- a/tools/testing/selftests/bpf/progs/map_ptr_kern.c
+++ b/tools/testing/selftests/bpf/progs/map_ptr_kern.c
@@ -367,7 +367,7 @@ static inline int check_array_of_maps(void)
 
 	VERIFY(check_default(&array_of_maps->map, map));
 	inner_map = bpf_map_lookup_elem(array_of_maps, &key);
-	VERIFY(inner_map != 0);
+	VERIFY(inner_map != NULL);
 	VERIFY(inner_map->map.max_entries == INNER_MAX_ENTRIES);
 
 	return 1;
@@ -394,7 +394,7 @@ static inline int check_hash_of_maps(void)
 
 	VERIFY(check_default(&hash_of_maps->map, map));
 	inner_map = bpf_map_lookup_elem(hash_of_maps, &key);
-	VERIFY(inner_map != 0);
+	VERIFY(inner_map != NULL);
 	VERIFY(inner_map->map.max_entries == INNER_MAX_ENTRIES);
 
 	return 1;
-- 
2.7.4