netdev - Re: [PATCH 2/2] bpf: annotate implicit fall through

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Date:   Tue, 15 Jan 2019 12:03:59 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Mathieu Malaterre <malat@...ian.org>,
        Alexei Starovoitov <ast@...nel.org>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] bpf: annotate implicit fall through

On 14.01.2019 23:29, Mathieu Malaterre wrote:

> There is a plan to build the kernel with -Wimplicit-fallthrough and
> thise place in the code produced a warnings (W=1).

    This?

> In this particular case change a ‘:’ with a ‘,’ so as to match the
> regular expression expected by GCC.
> 
> This commit remove the following warning:
> 
>    net/core/filter.c:5310:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> 
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>
> ---
>   net/core/filter.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/core/filter.c b/net/core/filter.c
> index 447dd1bad31f..c8069a142994 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -5309,7 +5309,7 @@ bpf_base_func_proto(enum bpf_func_id func_id)
>   	case BPF_FUNC_trace_printk:
>   		if (capable(CAP_SYS_ADMIN))
>   			return bpf_get_trace_printk_proto();
> -		/* else: fall through */
> +		/* else, fall through */

    The other patches seem to just drop "else:"...

>   	default:
>   		return NULL;
>   	}
> 

MBR, Sergei