Re: [PATCH -next v4 3/3] ext4: simplify read_mmp_block fucntion

Jan Kara
2021-10-19T13:49:57Z

On Tue 19-10-21 20:39:31, Ye Bin wrote:
> This patch is according to Jan Kara's suggestion:
> I guess I would just get rid of sb_getblk() in read_mmp_block() and always
> expect valid bh passed. The only place that passes NULL bh after this
> patch is one case in ext4_multi_mount_protect() and that can call
> sb_getblk() on its own. That way we can also simplify read_mmp_block()
> prototype to:
>
> static int read_mmp_block(struct super_block *sb, struct buffer_head *bh);
>
> Signed-off-by: Ye Bin <yebin10@huawei.com>
> Reviewed-by: Jan Kara <jack@suse.cz>

...

> @@ -289,7 +279,11 @@ int ext4_multi_mount_protect(struct super_block *sb,
> goto failed;
> }
>
> - retval = read_mmp_block(sb, &bh, mmp_block);
> + bh = sb_getblk(sb, mmp_block);
> + if (bh)
^^^^^^

!bh here, please.

Honza

--
Jan Kara <jack@suse.com>
SUSE Labs, CR