linux-kernel - Re: [PATCH] mm/fs: Remove redundant code

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Date:   Fri, 25 Feb 2022 02:30:40 +0900
From:   Ryusuke Konishi <konishi.ryusuke@...il.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     linux-nilfs <linux-nilfs@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH] mm/fs: Remove redundant code

Hi Jiapeng,

On Mon, Feb 7, 2022 at 7:37 PM Jiapeng Chong
<jiapeng.chong@...ux.alibaba.com> wrote:
>
> Clean up the following smatch warning:
>
> fs/nilfs2/segbuf.c:358 nilfs_segbuf_submit_bio() warn: ignoring
> unreachable code.
>
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>  fs/nilfs2/segbuf.c | 4 ----
>  1 file changed, 4 deletions(-)
>
> diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
> index 9e5dd6324ea1..50d7e2e4daed 100644
> --- a/fs/nilfs2/segbuf.c
> +++ b/fs/nilfs2/segbuf.c
> @@ -341,7 +341,6 @@ static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf,
>                                    int mode_flags)
>  {
>         struct bio *bio = wi->bio;
> -       int err;
>
>         bio->bi_end_io = nilfs_end_bio_write;
>         bio->bi_private = segbuf;
> @@ -354,9 +353,6 @@ static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf,
>         wi->nr_vecs = min(wi->max_pages, wi->rest_blocks);
>         wi->start = wi->end;
>         return 0;
> -
> -       wi->bio = NULL;
> -       return err;
>  }

Sorry for my late reply.

I will send this to Andrew to report and fix the regression on the -mm
patch series.

I'd like to change the patch title to something like "nilfs2: Remove
redundant code"
since the "mm/fs" prefix does not properly represent what it applies to.
(this patch may be folded into the patch that is causing the warning)

Regards,
Ryusuke Konishi