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From:   "Sungjong Seo" <sj1557.seo@samsung.com>
To:     "'Tetsuhiro Kohada'" <kohada.t2@gmail.com>
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        <mori.takahiro@ab.mitsubishielectric.co.jp>,
        <motai.hirotaka@aj.mitsubishielectric.co.jp>,
        "'Namjae Jeon'" <namjae.jeon@samsung.com>,
        <linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>
In-Reply-To: <20200909075652.11203-1-kohada.t2@gmail.com>
Subject: RE: [PATCH] exfat: remove 'rwoffset' in exfat_inode_info
Date:   Sat, 12 Sep 2020 14:01:23 +0900
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> Remove 'rwoffset' in exfat_inode_info and replace it with the
> parameter(cpos) of exfat_readdir.
> Since rwoffset of  is referenced only by exfat_readdir, it is not
> necessary a exfat_inode_info's member.
> 
> Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
> ---
>  fs/exfat/dir.c      | 16 ++++++----------
>  fs/exfat/exfat_fs.h |  2 --
>  fs/exfat/file.c     |  2 --
>  fs/exfat/inode.c    |  3 ---
>  fs/exfat/super.c    |  1 -
>  5 files changed, 6 insertions(+), 18 deletions(-)
> 
> diff --git a/fs/exfat/dir.c b/fs/exfat/dir.c index
> a9b13ae3f325..fa5bb72aa295 100644
> --- a/fs/exfat/dir.c
> +++ b/fs/exfat/dir.c
[snip]
> sector @@ -262,13 +260,11 @@ static int exfat_iterate(struct file *filp,
> struct dir_context *ctx)
>  		goto end_of_dir;
>  	}
> 
> -	cpos = EXFAT_DEN_TO_B(ei->rwoffset);
> -
>  	if (!nb->lfn[0])
>  		goto end_of_dir;
> 
>  	i_pos = ((loff_t)ei->start_clu << 32) |
> -		((ei->rwoffset - 1) & 0xffffffff);
> +		(EXFAT_B_TO_DEN(cpos-1) & 0xffffffff);

Need to fix the above line to be:
(EXFAT_B_TO_DEN(cpos)-1)) & 0xffffffff);