linux-kernel - Re: [PATCH 4/5] fs: don't call ->writepage from __mpage

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Message-ID: <20220609173119.b34yp6ey6ybokfdl@quack3.lan>
Date:   Thu, 9 Jun 2022 19:31:19 +0200
From:   Jan Kara <jack@...e.cz>
To:     Christoph Hellwig <hch@....de>
Cc:     Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.com>,
        Dave Kleikamp <shaggy@...nel.org>, linux-ext4@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        jfs-discussion@...ts.sourceforge.net
Subject: Re: [PATCH 4/5] fs: don't call ->writepage from __mpage_writepage

On Wed 08-06-22 17:04:50, Christoph Hellwig wrote:
> All callers of mpage_writepage use block_write_full_page as their
> ->writepage implementation, so hard code that.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Similarly here NTFS (fs/ntfs3/) seems to have some non-trivial stuff besides
block_write_full_page()...

								Honza

> ---
>  fs/mpage.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/mpage.c b/fs/mpage.c
> index 31a97a0acf5f5..a354ef2b4b4eb 100644
> --- a/fs/mpage.c
> +++ b/fs/mpage.c
> @@ -624,7 +624,7 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
>  	/*
>  	 * The caller has a ref on the inode, so *mapping is stable
>  	 */
> -	ret = mapping->a_ops->writepage(page, wbc);
> +	ret = block_write_full_page(page, mpd->get_block, wbc);
>  	mapping_set_error(mapping, ret);
>  out:
>  	mpd->bio = bio;
> -- 
> 2.30.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR