fs/fs-writeback.c: remove unneccesary parameter of __writeback_single_inode()

The parameter 'wb' is never used in this function.
Signed-off-by: Yan Hong <clouds.yan@gmail.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/fs-writeback.c

@@ -439,8 +439,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
  * setting I_SYNC flag and calling inode_sync_complete() to clear it.
  */
 static int
-__writeback_single_inode(struct inode *inode, struct bdi_writeback *wb,
-			 struct writeback_control *wbc)
+__writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
 {
 	struct address_space *mapping = inode->i_mapping;
 	long nr_to_write = wbc->nr_to_write;
@@ -527,7 +526,7 @@ writeback_single_inode(struct inode *inode, struct bdi_writeback *wb,
 	inode->i_state |= I_SYNC;
 	spin_unlock(&inode->i_lock);
 
-	ret = __writeback_single_inode(inode, wb, wbc);
+	ret = __writeback_single_inode(inode, wbc);
 
 	spin_lock(&wb->list_lock);
 	spin_lock(&inode->i_lock);
@@ -670,7 +669,7 @@ static long writeback_sb_inodes(struct super_block *sb,
 		 * We use I_SYNC to pin the inode in memory. While it is set
 		 * evict_inode() will wait so the inode cannot be freed.
 		 */
-		__writeback_single_inode(inode, wb, &wbc);
+		__writeback_single_inode(inode, &wbc);
 
 		work->nr_pages -= write_chunk - wbc.nr_to_write;
 		wrote += write_chunk - wbc.nr_to_write;