linux-kernel - Re: [PATCH 3/4] vfs: Make __fsync_super() a static function (version 3)

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Date:	Thu, 23 Apr 2009 17:39:50 -0400
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Jan Kara <jack@...e.cz>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 3/4] vfs: Make __fsync_super() a static function
 (version 3)

On Thu, 2009-04-23 at 23:35 +0200, Jan Kara wrote:
> __fsync_super() does the same thing as fsync_super(). So change the only
> caller to use fsync_super() and make __fsync_super() static. This removes
> unnecessarily duplicated call to sync_blockdev() and prepares ground
> for the changes to __fsync_super() in the following patches.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>
> ---
>  fs/block_dev.c     |    2 +-
>  fs/super.c         |    5 ++---
>  include/linux/fs.h |    1 -
>  3 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/block_dev.c b/fs/block_dev.c
> index f45dbc1..48d1290 100644
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -240,7 +240,7 @@ struct super_block *freeze_bdev(struct block_device *bdev)
>  		sb->s_frozen = SB_FREEZE_WRITE;
>  		smp_wmb();
>  
> -		__fsync_super(sb);
> +		fsync_super(sb);
>  
>  		sb->s_frozen = SB_FREEZE_TRANS;
>  		smp_wmb();
> diff --git a/fs/super.c b/fs/super.c
> index d9759e0..4c92068 100644
> --- a/fs/super.c
> +++ b/fs/super.c
> @@ -263,7 +263,7 @@ EXPORT_SYMBOL(unlock_super);
>   * device.  Takes the superblock lock.  Requires a second blkdev
>   * flush by the caller to complete the operation.
>   */
> -void __fsync_super(struct super_block *sb)
> +static int __fsync_super(struct super_block *sb)
>  {
>  	sync_inodes_sb(sb, 0);
>  	vfs_dq_sync(sb);

Still missing the return value here :-)

> @@ -284,8 +284,7 @@ void __fsync_super(struct super_block *sb)
>   */
>  int fsync_super(struct super_block *sb)
>  {
> -	__fsync_super(sb);
> -	return sync_blockdev(sb->s_bdev);
> +	return __fsync_super(sb);
>  }
>  EXPORT_SYMBOL_GPL(fsync_super);
>  
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 4bad02e..47a67c9 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2084,7 +2084,6 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
>  extern int vfs_fsync(struct file *file, struct dentry *dentry, int datasync);
>  extern void sync_supers(void);
>  extern void sync_filesystems(int wait);
> -extern void __fsync_super(struct super_block *sb);
>  extern void emergency_sync(void);
>  extern void emergency_remount(void);
>  extern int do_remount_sb(struct super_block *sb, int flags,

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