From: Shuah Khan <skhan@linuxfoundation.org>
To: Haowen Bai <baihaowen@meizu.com>,
shuah@kernel.org, ast@kernel.org, daniel@iogearbox.net,
andrii@kernel.org, kafai@fb.com, songliubraving@fb.com,
yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org
Cc: linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
Shuah Khan <skhan@linuxfoundation.org>
Subject: Re: [PATCH] selftests/bpf: Fix warning comparing pointer to 0
Date: Fri, 25 Mar 2022 13:55:35 -0600 [thread overview]
Message-ID: <29503ac1-69ab-a0b7-53bc-5a7522baa289@linuxfoundation.org> (raw)
In-Reply-To: <1648087725-29435-1-git-send-email-baihaowen@meizu.com>
On 3/23/22 8:08 PM, Haowen Bai wrote:
> Avoid pointer type value compared with 0 to make code clear.
>
Patch looks good to me. Please include the error/warn message
in the commit log. This gives reviewers information on how
this problem is found.
> Signed-off-by: Haowen Bai <baihaowen@meizu.com>
> ---
> 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;
>
With the change to commit log including the error/warn message and
details on how the problems is found:
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
thanks,
-- Shuah
next prev parent reply other threads:[~2022-03-25 20:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-24 2:08 [PATCH] selftests/bpf: Fix warning comparing pointer to 0 Haowen Bai
2022-03-24 20:28 ` Martin KaFai Lau
2022-03-25 1:15 ` 答复: " 白浩文
2022-03-25 19:55 ` Shuah Khan [this message]
2022-03-30 1:59 ` [PATCH V2] " Haowen Bai
2022-03-30 3:16 ` Yonghong Song
2022-03-30 13:30 ` patchwork-bot+netdevbpf
-- strict thread matches above, loose matches on Subject: below --
2021-04-22 10:00 [PATCH] selftests/bpf: fix " Jiapeng Chong
2021-04-22 21:56 ` Daniel Borkmann
2021-04-23 11:57 ` Abaci Robot
2021-04-23 16:47 ` Alexei Starovoitov
2021-03-18 1:55 Jiapeng Chong
2021-03-18 16:23 ` Daniel Borkmann
2021-04-22 8:09 ` Jiapeng Chong
2021-03-16 7:59 Jiapeng Chong
2021-03-16 23:00 ` patchwork-bot+netdevbpf
2021-03-10 6:22 Jiapeng Chong
2021-03-10 9:31 ` Yauheni Kaliuta
2021-03-10 22:00 ` patchwork-bot+netdevbpf
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