netdev - Re: [PATCH bpf-next] selftests/bpf: initialize duration in xdp

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Date:   Thu, 1 Oct 2020 16:22:36 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     Stanislav Fomichev <sdf@...gle.com>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <davem@...emloft.net>, <ast@...nel.org>, <daniel@...earbox.net>
Subject: Re: [PATCH bpf-next] selftests/bpf: initialize duration in
 xdp_noinline.c

On Thu, Oct 01, 2020 at 03:54:40PM -0700, Stanislav Fomichev wrote:
> Fixes clang error:
> tools/testing/selftests/bpf/prog_tests/xdp_noinline.c:35:6: error: variable 'duration' is uninitialized when used here [-Werror,-Wuninitialized]
>         if (CHECK(!skel, "skel_open_and_load", "failed\n"))
>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
> ---
>  tools/testing/selftests/bpf/prog_tests/xdp_noinline.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_noinline.c b/tools/testing/selftests/bpf/prog_tests/xdp_noinline.c
> index a1f06424cf83..0281095de266 100644
> --- a/tools/testing/selftests/bpf/prog_tests/xdp_noinline.c
> +++ b/tools/testing/selftests/bpf/prog_tests/xdp_noinline.c
> @@ -25,7 +25,7 @@ void test_xdp_noinline(void)
>  		__u8 flags;
>  	} real_def = {.dst = MAGIC_VAL};
>  	__u32 ch_key = 11, real_num = 3;
> -	__u32 duration, retval, size;
> +	__u32 duration = 0, retval, size;
Acked-by: Martin KaFai Lau <kafai@...com>