linux-kernel - Re: [PATCH] blkcg: annotate implicit fall through

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Message-ID: <CA+7wUsyrAByMiD8zYzopwFQr9Yt6nk4V=FV8Rp=uSSq7sTipCQ@mail.gmail.com>
Date:   Wed, 13 Mar 2019 21:26:17 +0100
From:   Mathieu Malaterre <malat@...ian.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>, linux-block@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: Re: [PATCH] blkcg: annotate implicit fall through

ping ?

On Mon, Jan 14, 2019 at 9:31 PM Mathieu Malaterre <malat@...ian.org> wrote:
>
> There is a plan to build the kernel with -Wimplicit-fallthrough and
> this place in the code produced a warning (W=1).
>
> This commit remove the following warning:
>
>   kernel/trace/blktrace.c:725:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
>
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>
> ---
>  kernel/trace/blktrace.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
> index fac0ddf8a8e2..e1c6d79fb4cc 100644
> --- a/kernel/trace/blktrace.c
> +++ b/kernel/trace/blktrace.c
> @@ -723,6 +723,7 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
>  #endif
>         case BLKTRACESTART:
>                 start = 1;
> +               /* fall through */
>         case BLKTRACESTOP:
>                 ret = __blk_trace_startstop(q, start);
>                 break;
> --
> 2.19.2
>