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a trivial writeback fix

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Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux

Pull writeback fix from Wu Fengguang:
 "A trivial writeback fix"

* tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  writeback: Do not sort b_io list only because of block device inode
This commit is contained in:
Linus Torvalds 2013-09-13 23:06:40 -04:00
commit 3711d86a2d
3 changed files with 12 additions and 4 deletions
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8
fs/fs-writeback.c
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@ -69,7 +69,7 @@ static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
if (strcmp(sb->s_type->name, "bdev") == 0)
if (sb_is_blkdev_sb(sb))
return inode->i_mapping->backing_dev_info;
return sb->s_bdi;
@ -251,11 +251,13 @@ static int move_expired_inodes(struct list_head *delaying_queue,
if (work->older_than_this &&
inode_dirtied_after(inode, *work->older_than_this))
break;
list_move(&inode->i_wb_list, &tmp);
moved++;
if (sb_is_blkdev_sb(inode->i_sb))
continue;
if (sb && sb != inode->i_sb)
do_sb_sort = 1;
sb = inode->i_sb;
list_move(&inode->i_wb_list, &tmp);
moved++;
}
/* just one sb in list, splice to dispatch_queue and we're done */