linux-ext4 - Re: [PATCH v5 6/9] iomap: Rename page_prepare handler to get

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Message-ID: <Y7W7WYW2mPLHACcl@magnolia>
Date:   Wed, 4 Jan 2023 09:46:01 -0800
From:   "Darrick J. Wong" <djwong@...nel.org>
To:     Andreas Gruenbacher <agruenba@...hat.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, cluster-devel@...hat.com
Subject: Re: [PATCH v5 6/9] iomap: Rename page_prepare handler to get_folio

On Sat, Dec 31, 2022 at 04:09:16PM +0100, Andreas Gruenbacher wrote:
> The ->page_prepare() handler in struct iomap_page_ops is now somewhat
> misnamed, so rename it to ->get_folio().
> 
> Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com>

Looks good to me,
Reviewed-by: Darrick J. Wong <djwong@...nel.org>

--D

> ---
>  fs/gfs2/bmap.c         | 6 +++---
>  fs/iomap/buffered-io.c | 4 ++--
>  include/linux/iomap.h  | 6 +++---
>  3 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
> index 41349e09558b..d3adb715ac8c 100644
> --- a/fs/gfs2/bmap.c
> +++ b/fs/gfs2/bmap.c
> @@ -957,7 +957,7 @@ static int __gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
>  }
>  
>  static struct folio *
> -gfs2_iomap_page_prepare(struct iomap_iter *iter, loff_t pos, unsigned len)
> +gfs2_iomap_get_folio(struct iomap_iter *iter, loff_t pos, unsigned len)
>  {
>  	struct inode *inode = iter->inode;
>  	unsigned int blockmask = i_blocksize(inode) - 1;
> @@ -998,7 +998,7 @@ static void gfs2_iomap_put_folio(struct inode *inode, loff_t pos,
>  }
>  
>  static const struct iomap_page_ops gfs2_iomap_page_ops = {
> -	.page_prepare = gfs2_iomap_page_prepare,
> +	.get_folio = gfs2_iomap_get_folio,
>  	.put_folio = gfs2_iomap_put_folio,
>  };
>  
> @@ -1291,7 +1291,7 @@ int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock,
>  /*
>   * NOTE: Never call gfs2_block_zero_range with an open transaction because it
>   * uses iomap write to perform its actions, which begin their own transactions
> - * (iomap_begin, page_prepare, etc.)
> + * (iomap_begin, get_folio, etc.)
>   */
>  static int gfs2_block_zero_range(struct inode *inode, loff_t from,
>  				 unsigned int length)
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 7decd8cdc755..4f363d42dbaf 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -642,8 +642,8 @@ static int iomap_write_begin(struct iomap_iter *iter, loff_t pos,
>  	if (!mapping_large_folio_support(iter->inode->i_mapping))
>  		len = min_t(size_t, len, PAGE_SIZE - offset_in_page(pos));
>  
> -	if (page_ops && page_ops->page_prepare)
> -		folio = page_ops->page_prepare(iter, pos, len);
> +	if (page_ops && page_ops->get_folio)
> +		folio = page_ops->get_folio(iter, pos, len);
>  	else
>  		folio = iomap_get_folio(iter, pos);
>  	if (IS_ERR(folio))
> diff --git a/include/linux/iomap.h b/include/linux/iomap.h
> index 87b5d0f8e578..dd3575ada5d1 100644
> --- a/include/linux/iomap.h
> +++ b/include/linux/iomap.h
> @@ -126,17 +126,17 @@ static inline bool iomap_inline_data_valid(const struct iomap *iomap)
>  }
>  
>  /*
> - * When a filesystem sets page_ops in an iomap mapping it returns, page_prepare
> + * When a filesystem sets page_ops in an iomap mapping it returns, get_folio
>   * and put_folio will be called for each page written to.  This only applies to
>   * buffered writes as unbuffered writes will not typically have pages
>   * associated with them.
>   *
> - * When page_prepare succeeds, put_folio will always be called to do any
> + * When get_folio succeeds, put_folio will always be called to do any
>   * cleanup work necessary.  put_folio is responsible for unlocking and putting
>   * @folio.
>   */
>  struct iomap_page_ops {
> -	struct folio *(*page_prepare)(struct iomap_iter *iter, loff_t pos,
> +	struct folio *(*get_folio)(struct iomap_iter *iter, loff_t pos,
>  			unsigned len);
>  	void (*put_folio)(struct inode *inode, loff_t pos, unsigned copied,
>  			struct folio *folio);
> -- 
> 2.38.1
>