[PATCH] inodes_stat.nr_unused fix

__sync_single_inode() is forgetting to increment inodes_stat.nr_unused when
moving a previously-dirty inode onto the inode_unused list.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/fs-writeback.c

@@ -225,6 +225,7 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc)
 			 * The inode is clean, unused
 			 */
 			list_move(&inode->i_list, &inode_unused);
+			inodes_stat.nr_unused++;
 		}
 	}
 	wake_up_inode(inode);