linux-kernel - Re: [PATCH] fat: Delete an unnecessary check before brelse()

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Message-ID: <87r24rxf30.fsf@mail.parknet.co.jp>
Date:   Sun, 08 Sep 2019 19:22:27 +0900
From:   OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Markus Elfring <Markus.Elfring@....de>,
        kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fat: Delete an unnecessary check before brelse()

Markus Elfring <Markus.Elfring@....de> writes:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Tue, 3 Sep 2019 14:56:16 +0200
>
> The brelse() function tests whether its argument is NULL
> and then returns immediately.
> Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Acked-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>

Thanks.

> ---
>  fs/fat/dir.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/fs/fat/dir.c b/fs/fat/dir.c
> index 1bda2ab6745b..f4bc87a3c98d 100644
> --- a/fs/fat/dir.c
> +++ b/fs/fat/dir.c
> @@ -88,9 +88,7 @@ static int fat__get_entry(struct inode *dir, loff_t *pos,
>  	int err, offset;
>
>  next:
> -	if (*bh)
> -		brelse(*bh);
> -
> +	brelse(*bh);
>  	*bh = NULL;
>  	iblock = *pos >> sb->s_blocksize_bits;
>  	err = fat_bmap(dir, iblock, &phys, &mapped_blocks, 0, false);
> --
> 2.23.0
>

-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>