linux-kernel - Re: [PATCH] f2fs: fix align check for npo2

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Date:   Thu, 23 Mar 2023 16:47:51 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Yohan Joung <jyh429@...il.com>
Cc:     lkp@...el.com, chao@...nel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, oe-kbuild-all@...ts.linux.dev,
        Yohan Joung <yohan.joung@...com>
Subject: Re: [PATCH] f2fs: fix align check for npo2

On 03/23, Yohan Joung wrote:
> Fix alignment check to be correct in npo2 as well
> 
> Signed-off-by: Yohan Joung <yohan.joung@...com>
> ---
>  fs/f2fs/segment.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 055e70e77aa2..46458085a8d0 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -1858,7 +1858,7 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
>  		sector = SECTOR_FROM_BLOCK(blkstart);
>  		nr_sects = SECTOR_FROM_BLOCK(blklen);
>  
> -		if (sector & (bdev_zone_sectors(bdev) - 1) ||
> +		if (sector % bdev_zone_sectors(bdev) ||

Need to use div_u64_rem()?

>  				nr_sects != bdev_zone_sectors(bdev)) {
>  			f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)",
>  				 devi, sbi->s_ndevs ? FDEV(devi).path : "",
> 
> base-commit: d15180a8d1d72c7bddcb700d2c9ffdab7d2b9481
> -- 
> 2.25.1