linux-ext4 - Re: [PATCH 13/14] ext2: replace bh_submit_read() helper with bh_read

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Date:   Wed, 31 Aug 2022 13:15:51 +0200
From:   Jan Kara <jack@...e.cz>
To:     Zhang Yi <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, cluster-devel@...hat.com,
        ntfs3@...ts.linux.dev, ocfs2-devel@....oracle.com,
        reiserfs-devel@...r.kernel.org, jack@...e.cz, tytso@....edu,
        akpm@...ux-foundation.org, axboe@...nel.dk,
        viro@...iv.linux.org.uk, rpeterso@...hat.com, agruenba@...hat.com,
        almaz.alexandrovich@...agon-software.com, mark@...heh.com,
        dushistov@...l.ru, hch@...radead.org, chengzhihao1@...wei.com,
        yukuai3@...wei.com
Subject: Re: [PATCH 13/14] ext2: replace bh_submit_read() helper with
 bh_read_locked()

On Wed 31-08-22 15:21:10, Zhang Yi wrote:
> bh_submit_read() is almost the same as bh_read_locked(), switch to use
> bh_read_locked() in read_block_bitmap(), prepare remove the old one.
> 
> Signed-off-by: Zhang Yi <yi.zhang@...wei.com>
...
> diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
> index c17ccc19b938..548a1d607f5a 100644
> --- a/fs/ext2/balloc.c
> +++ b/fs/ext2/balloc.c
> @@ -142,7 +142,7 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
>  	if (likely(bh_uptodate_or_lock(bh)))
>  		return bh;
>  
> -	if (bh_submit_read(bh) < 0) {
> +	if (bh_read_locked(bh, 0) < 0) {

I would just use bh_read() here and thus remove a bit more of the
boilerplate code (like the bh_uptodate_or_lock() checking).

							Honza

>  		brelse(bh);
>  		ext2_error(sb, __func__,
>  			    "Cannot read block bitmap - "
> -- 
> 2.31.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR