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Date:   Thu, 1 Sep 2022 17:59:54 +0200
From:   Jan Kara <jack@suse.cz>
To:     Zhang Yi <yi.zhang@huawei.com>
Cc:     linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, cluster-devel@redhat.com,
        ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com,
        reiserfs-devel@vger.kernel.org, jack@suse.cz, tytso@mit.edu,
        akpm@linux-foundation.org, axboe@kernel.dk,
        viro@zeniv.linux.org.uk, rpeterso@redhat.com, agruenba@redhat.com,
        almaz.alexandrovich@paragon-software.com, mark@fasheh.com,
        dushistov@mail.ru, hch@infradead.org, chengzhihao1@huawei.com,
        yukuai3@huawei.com
Subject: Re: [PATCH v2 13/14] ext2: replace bh_submit_read() helper with
 bh_read_locked()
Message-ID: <20220901155954.4xwvu25bkhgz4uro@quack3>
References: <20220901133505.2510834-1-yi.zhang@huawei.com>
 <20220901133505.2510834-14-yi.zhang@huawei.com>
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On Thu 01-09-22 21:35:04, Zhang Yi wrote:
> bh_submit_read() and the uptodate check logic in bh_uptodate_or_lock()
> has been integrated in bh_read() helper, so switch to use it directly.
> 
> Signed-off-by: Zhang Yi <yi.zhang@huawei.com>

Looks good to me. Feel free to add:

Reviewed-by: Jan Kara <jack@suse.cz>

								Honza

> ---
>  fs/ext2/balloc.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
> index c17ccc19b938..5dc0a31f4a08 100644
> --- a/fs/ext2/balloc.c
> +++ b/fs/ext2/balloc.c
> @@ -126,6 +126,7 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
>  	struct ext2_group_desc * desc;
>  	struct buffer_head * bh = NULL;
>  	ext2_fsblk_t bitmap_blk;
> +	int ret;
>  
>  	desc = ext2_get_group_desc(sb, block_group, NULL);
>  	if (!desc)
> @@ -139,10 +140,10 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
>  			    block_group, le32_to_cpu(desc->bg_block_bitmap));
>  		return NULL;
>  	}
> -	if (likely(bh_uptodate_or_lock(bh)))
> +	ret = bh_read(bh, 0);
> +	if (ret > 0)
>  		return bh;
> -
> -	if (bh_submit_read(bh) < 0) {
> +	if (ret < 0) {
>  		brelse(bh);
>  		ext2_error(sb, __func__,
>  			    "Cannot read block bitmap - "
> -- 
> 2.31.1
> 
-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR