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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Goldwyn Rodrigues <rgoldwyn@suse.com>,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 03/19] iomap: always use AOP_FLAG_NOFS in iomap_write_begin
Date: Mon, 16 Sep 2019 11:11:09 -0700
Message-ID: <20190916181109.GH2229799@magnolia> (raw)
In-Reply-To: <20190909182722.16783-4-hch@lst.de>

On Mon, Sep 09, 2019 at 08:27:06PM +0200, Christoph Hellwig wrote:
> All callers pass AOP_FLAG_NOFS, so lift that flag to iomap_write_begin
> to allow reusing the flags arguments for an internal flags namespace
> soon.  Also remove the local index variable that is only used once.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

--D

> ---
>  fs/iomap/buffered-io.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 2a9b41352495..33e03992d8a7 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -606,7 +606,6 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
>  		struct page **pagep, struct iomap *iomap)
>  {
>  	const struct iomap_page_ops *page_ops = iomap->page_ops;
> -	pgoff_t index = pos >> PAGE_SHIFT;
>  	struct page *page;
>  	int status = 0;
>  
> @@ -621,7 +620,8 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
>  			return status;
>  	}
>  
> -	page = grab_cache_page_write_begin(inode->i_mapping, index, flags);
> +	page = grab_cache_page_write_begin(inode->i_mapping, pos >> PAGE_SHIFT,
> +			AOP_FLAG_NOFS);
>  	if (!page) {
>  		status = -ENOMEM;
>  		goto out_no_page;
> @@ -763,7 +763,6 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
>  	struct iov_iter *i = data;
>  	long status = 0;
>  	ssize_t written = 0;
> -	unsigned int flags = AOP_FLAG_NOFS;
>  
>  	do {
>  		struct page *page;
> @@ -793,8 +792,7 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
>  			break;
>  		}
>  
> -		status = iomap_write_begin(inode, pos, bytes, flags, &page,
> -				iomap);
> +		status = iomap_write_begin(inode, pos, bytes, 0, &page, iomap);
>  		if (unlikely(status))
>  			break;
>  
> @@ -892,8 +890,7 @@ iomap_dirty_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
>  		if (IS_ERR(rpage))
>  			return PTR_ERR(rpage);
>  
> -		status = iomap_write_begin(inode, pos, bytes,
> -					   AOP_FLAG_NOFS, &page, iomap);
> +		status = iomap_write_begin(inode, pos, bytes, 0, &page, iomap);
>  		put_page(rpage);
>  		if (unlikely(status))
>  			return status;
> @@ -944,8 +941,7 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset,
>  	struct page *page;
>  	int status;
>  
> -	status = iomap_write_begin(inode, pos, bytes, AOP_FLAG_NOFS, &page,
> -				   iomap);
> +	status = iomap_write_begin(inode, pos, bytes, 0, &page, iomap);
>  	if (status)
>  		return status;
>  
> -- 
> 2.20.1
> 

  reply index

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-09 18:27 iomap and xfs COW cleanups Christoph Hellwig
2019-09-09 18:27 ` [PATCH 01/19] iomap: better document the IOMAP_F_* flags Christoph Hellwig
2019-09-14  0:42   ` Allison Collins
2019-09-16 18:08   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 02/19] iomap: remove the unused iomap argument to __iomap_write_end Christoph Hellwig
2019-09-14  0:42   ` Allison Collins
2019-09-16 18:10   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 03/19] iomap: always use AOP_FLAG_NOFS in iomap_write_begin Christoph Hellwig
2019-09-16 18:11   ` Darrick J. Wong [this message]
2019-09-09 18:27 ` [PATCH 04/19] iomap: ignore non-shared or non-data blocks in xfs_file_dirty Christoph Hellwig
2019-09-16 18:12   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 05/19] iomap: move the zeroing case out of iomap_read_page_sync Christoph Hellwig
2019-09-16 18:17   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 06/19] iomap: use write_begin to read pages to unshare Christoph Hellwig
2019-09-16 18:34   ` Darrick J. Wong
2019-09-30 11:07     ` Christoph Hellwig
2019-10-08 15:12       ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 07/19] iomap: use a srcmap for a read-modify-write I/O Christoph Hellwig
2019-09-10 12:48   ` Goldwyn Rodrigues
2019-09-10 14:39     ` hch
2019-09-16 17:57       ` Darrick J. Wong
2019-09-16 18:42   ` Darrick J. Wong
2019-09-18 18:15     ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 08/19] xfs: also call xfs_file_iomap_end_delalloc for zeroing operations Christoph Hellwig
2019-09-18 17:09   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 09/19] xfs: remove xfs_reflink_dirty_extents Christoph Hellwig
2019-09-18 17:17   ` Darrick J. Wong
2019-09-18 17:25     ` Christoph Hellwig
2019-09-18 17:31       ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 10/19] xfs: pass two imaps to xfs_reflink_allocate_cow Christoph Hellwig
2019-09-18 17:26   ` Darrick J. Wong
2019-09-30 11:10     ` Christoph Hellwig
2019-09-09 18:27 ` [PATCH 11/19] xfs: refactor xfs_file_iomap_begin_delay Christoph Hellwig
2019-09-18 17:30   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 12/19] xfs: fill out the srcmap in iomap_begin Christoph Hellwig
2019-09-18 17:52   ` Darrick J. Wong
2019-10-01  6:26     ` Christoph Hellwig
2019-09-09 18:27 ` [PATCH 13/19] xfs: factor out a helper to calculate the end_fsb Christoph Hellwig
2019-09-14  0:42   ` Allison Collins
2019-09-18 17:55   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 14/19] xfs: split out a new set of read-only iomap ops Christoph Hellwig
2019-09-18 17:56   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 15/19] xfs: move xfs_file_iomap_begin_delay around Christoph Hellwig
2019-09-18 17:59   ` Darrick J. Wong
2019-09-30 11:14     ` Christoph Hellwig
2019-09-09 18:27 ` [PATCH 16/19] xfs: split the iomap ops for buffered vs direct writes Christoph Hellwig
2019-09-18 18:00   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 17/19] xfs: rename the whichfork variable in xfs_buffered_write_iomap_begin Christoph Hellwig
2019-09-14  0:42   ` Allison Collins
2019-09-18 18:00   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 18/19] xfs: cleanup xfs_iomap_write_unwritten Christoph Hellwig
2019-09-18 18:06   ` Darrick J. Wong
2019-09-09 18:27 ` [PATCH 19/19] xfs: improve the IOMAP_NOWAIT check for COW inodes Christoph Hellwig
2019-09-18 18:09   ` Darrick J. Wong

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