linux-ext4 - Re: [PATCH 14/14] fs/buffer: remove bh_submit

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Date:   Wed, 31 Aug 2022 13:16:14 +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 14/14] fs/buffer: remove bh_submit_read() helper

On Wed 31-08-22 15:21:11, Zhang Yi wrote:
> bh_submit_read() has no user anymore, just remove it.
> 
> Signed-off-by: Zhang Yi <yi.zhang@...wei.com>

Looks good. Feel free to add:

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

								Honza

> ---
>  fs/buffer.c                 | 25 -------------------------
>  include/linux/buffer_head.h |  1 -
>  2 files changed, 26 deletions(-)
> 
> diff --git a/fs/buffer.c b/fs/buffer.c
> index d1d09e2dacc2..fa7c2dbcef4c 100644
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -3029,31 +3029,6 @@ void __bh_read_batch(struct buffer_head *bhs[],
>  }
>  EXPORT_SYMBOL(__bh_read_batch);
>  
> -/**
> - * bh_submit_read - Submit a locked buffer for reading
> - * @bh: struct buffer_head
> - *
> - * Returns zero on success and -EIO on error.
> - */
> -int bh_submit_read(struct buffer_head *bh)
> -{
> -	BUG_ON(!buffer_locked(bh));
> -
> -	if (buffer_uptodate(bh)) {
> -		unlock_buffer(bh);
> -		return 0;
> -	}
> -
> -	get_bh(bh);
> -	bh->b_end_io = end_buffer_read_sync;
> -	submit_bh(REQ_OP_READ, bh);
> -	wait_on_buffer(bh);
> -	if (buffer_uptodate(bh))
> -		return 0;
> -	return -EIO;
> -}
> -EXPORT_SYMBOL(bh_submit_read);
> -
>  void __init buffer_init(void)
>  {
>  	unsigned long nrpages;
> diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
> index 1c93ff8c8f51..576f3609ac4e 100644
> --- a/include/linux/buffer_head.h
> +++ b/include/linux/buffer_head.h
> @@ -230,7 +230,6 @@ int submit_bh(blk_opf_t, struct buffer_head *);
>  void write_boundary_block(struct block_device *bdev,
>  			sector_t bblock, unsigned blocksize);
>  int bh_uptodate_or_lock(struct buffer_head *bh);
> -int bh_submit_read(struct buffer_head *bh);
>  int __bh_read(struct buffer_head *bh, blk_opf_t op_flags, bool wait);
>  void __bh_read_batch(struct buffer_head *bhs[],
>  		     int nr, blk_opf_t op_flags, bool force_lock);
> -- 
> 2.31.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR