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From: Eric Biggers <ebiggers@kernel.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org,
	linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com,
	ocfs2-devel@oss.oracle.com, linux-xfs@vger.kernel.org,
	William Kucharski <william.kucharski@oracle.com>
Subject: Re: [PATCH v9 21/25] ext4: Pass the inode to ext4_mpage_readpages
Date: Fri, 20 Mar 2020 11:44:18 -0700
Message-ID: <20200320184418.GH851@sol.localdomain> (raw)
In-Reply-To: <20200320142231.2402-22-willy@infradead.org>

On Fri, Mar 20, 2020 at 07:22:27AM -0700, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> 
> This function now only uses the mapping argument to look up the inode,
> and both callers already have the inode, so just pass the inode instead
> of the mapping.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
> ---
>  fs/ext4/ext4.h     | 2 +-
>  fs/ext4/inode.c    | 4 ++--
>  fs/ext4/readpage.c | 3 +--
>  3 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 1570a0b51b73..bc1b34ba6eab 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -3278,7 +3278,7 @@ static inline void ext4_set_de_type(struct super_block *sb,
>  }
>  
>  /* readpages.c */
> -extern int ext4_mpage_readpages(struct address_space *mapping,
> +extern int ext4_mpage_readpages(struct inode *inode,
>  		struct readahead_control *rac, struct page *page);
>  extern int __init ext4_init_post_read_processing(void);
>  extern void ext4_exit_post_read_processing(void);
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index d674c5f9066c..4f3703c1408d 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -3226,7 +3226,7 @@ static int ext4_readpage(struct file *file, struct page *page)
>  		ret = ext4_readpage_inline(inode, page);
>  
>  	if (ret == -EAGAIN)
> -		return ext4_mpage_readpages(page->mapping, NULL, page);
> +		return ext4_mpage_readpages(inode, NULL, page);
>  
>  	return ret;
>  }
> @@ -3239,7 +3239,7 @@ static void ext4_readahead(struct readahead_control *rac)
>  	if (ext4_has_inline_data(inode))
>  		return;
>  
> -	ext4_mpage_readpages(rac->mapping, rac, NULL);
> +	ext4_mpage_readpages(inode, rac, NULL);
>  }
>  
>  static void ext4_invalidatepage(struct page *page, unsigned int offset,
> diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
> index 66275f25235d..5761e9961682 100644
> --- a/fs/ext4/readpage.c
> +++ b/fs/ext4/readpage.c
> @@ -221,13 +221,12 @@ static inline loff_t ext4_readpage_limit(struct inode *inode)
>  	return i_size_read(inode);
>  }
>  
> -int ext4_mpage_readpages(struct address_space *mapping,
> +int ext4_mpage_readpages(struct inode *inode,
>  		struct readahead_control *rac, struct page *page)
>  {
>  	struct bio *bio = NULL;
>  	sector_t last_block_in_bio = 0;
>  
> -	struct inode *inode = mapping->host;
>  	const unsigned blkbits = inode->i_blkbits;
>  	const unsigned blocks_per_page = PAGE_SIZE >> blkbits;
>  	const unsigned blocksize = 1 << blkbits;
> -- 

Reviewed-by: Eric Biggers <ebiggers@google.com>

- Eric

  reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-20 14:22 [PATCH v9 00/25] Change readahead API Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 01/25] mm: Move readahead prototypes from mm.h Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 02/25] mm: Return void from various readahead functions Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 03/25] mm: Ignore return value of ->readpages Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 04/25] mm: Move readahead nr_pages check into read_pages Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 05/25] mm: Add new readahead_control API Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 06/25] mm: Use readahead_control to pass arguments Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 07/25] mm: Rename various 'offset' parameters to 'index' Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 08/25] mm: rename readahead loop variable to 'i' Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 09/25] mm: Remove 'page_offset' from readahead loop Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 10/25] mm: Put readahead pages in cache earlier Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 11/25] mm: Add readahead address space operation Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 12/25] mm: Move end_index check out of readahead loop Matthew Wilcox
2020-03-20 16:58   ` Eric Biggers
2020-03-20 17:30     ` Matthew Wilcox
2020-03-20 18:00       ` Eric Biggers
2020-03-20 18:11         ` Matthew Wilcox
2020-03-20 18:24           ` Eric Biggers
2020-03-22 16:28             ` Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 13/25] mm: Add page_cache_readahead_unbounded Matthew Wilcox
2020-03-20 17:27   ` Eric Biggers
2020-03-20 14:22 ` [PATCH v9 14/25] mm: Document why we don't set PageReadahead Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 15/25] mm: Use memalloc_nofs_save in readahead path Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 16/25] fs: Convert mpage_readpages to mpage_readahead Matthew Wilcox
2020-03-20 23:24   ` Namjae Jeon
2020-03-20 14:22 ` [PATCH v9 17/25] btrfs: Convert from readpages to readahead Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 18/25] erofs: Convert uncompressed files " Matthew Wilcox
2020-03-21 12:38   ` [f2fs-dev] " Chao Yu
2020-03-20 14:22 ` [PATCH v9 19/25] erofs: Convert compressed " Matthew Wilcox
2020-03-21 12:41   ` [f2fs-dev] " Chao Yu
2020-03-20 14:22 ` [PATCH v9 20/25] ext4: Convert " Matthew Wilcox
2020-03-20 17:37   ` Eric Biggers
2020-03-20 17:48     ` Matthew Wilcox
2020-03-20 18:40       ` Eric Biggers
2020-03-20 14:22 ` [PATCH v9 21/25] ext4: Pass the inode to ext4_mpage_readpages Matthew Wilcox
2020-03-20 18:44   ` Eric Biggers [this message]
2020-03-20 14:22 ` [PATCH v9 22/25] f2fs: Convert from readpages to readahead Matthew Wilcox
2020-03-20 18:51   ` Eric Biggers
2020-03-21 12:34   ` [f2fs-dev] " Chao Yu
2020-03-23  3:55   ` Jaegeuk Kim
2020-03-20 14:22 ` [PATCH v9 23/25] f2fs: Pass the inode to f2fs_mpage_readpages Matthew Wilcox
2020-03-20 18:52   ` Eric Biggers
2020-03-21 12:35   ` [f2fs-dev] " Chao Yu
2020-03-23  3:53   ` Jaegeuk Kim
2020-03-20 14:22 ` [PATCH v9 24/25] fuse: Convert from readpages to readahead Matthew Wilcox
2020-03-20 14:22 ` [PATCH v9 25/25] iomap: " Matthew Wilcox

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