Btrfs: btrfs_add_ordered_operation: Fix last modified transaction comparison.

Comparison of an inode's last modified transaction with the last committed
transaction is incorrect. Fix it.
Signed-off-by: Nchandan <chandan@linux.vnet.ibm.com>
Signed-off-by: NJosef Bacik <jbacik@fusionio.com>
Signed-off-by: NChris Mason <chris.mason@fusionio.com>

fs/btrfs/ordered-data.c

@@ -1076,7 +1076,7 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
 	 * if this file hasn't been changed since the last transaction
 	 * commit, we can safely return without doing anything
 	 */
-	if (last_mod < root->fs_info->last_trans_committed)
+	if (last_mod <= root->fs_info->last_trans_committed)
 		return;
 
 	spin_lock(&root->fs_info->ordered_root_lock);