Btrfs: kill obsolete arguments in btrfs_wait_ordered_extents

nocow_only is now an obsolete argument.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>

fs/btrfs/extent-tree.c

@@ -3722,7 +3722,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
 	if (delalloc_bytes == 0) {
 		if (trans)
 			return;
-		btrfs_wait_ordered_extents(root, 0, 0);
+		btrfs_wait_ordered_extents(root, 0);
 		return;
 	}
 
@@ -3748,7 +3748,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
 
 		loops++;
 		if (wait_ordered && !trans) {
-			btrfs_wait_ordered_extents(root, 0, 0);
+			btrfs_wait_ordered_extents(root, 0);
 		} else {
 			time_left = schedule_timeout_killable(1);
 			if (time_left)

fs/btrfs/ordered-data.c

@@ -468,8 +468,7 @@ void btrfs_remove_ordered_extent(struct inode *inode,
  * wait for all the ordered extents in a root.  This is done when balancing
  * space between drives.
  */
-void btrfs_wait_ordered_extents(struct btrfs_root *root,
-				int nocow_only, int delay_iput)
+void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
 {
 	struct list_head splice;
 	struct list_head *cur;
@@ -484,15 +483,6 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root,
 		cur = splice.next;
 		ordered = list_entry(cur, struct btrfs_ordered_extent,
 				     root_extent_list);
-		if (nocow_only &&
-		    !test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags) &&
-		    !test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags)) {
-			list_move(&ordered->root_extent_list,
-				  &root->fs_info->ordered_extents);
-			cond_resched_lock(&root->fs_info->ordered_extent_lock);
-			continue;
-		}
-
 		list_del_init(&ordered->root_extent_list);
 		atomic_inc(&ordered->refs);
 

fs/btrfs/ordered-data.h

@@ -190,8 +190,7 @@ void btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
 void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
 				 struct btrfs_root *root,
 				 struct inode *inode);
-void btrfs_wait_ordered_extents(struct btrfs_root *root,
-				int nocow_only, int delay_iput);
+void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput);
 int __init ordered_data_init(void);
 void ordered_data_exit(void);
 #endif

fs/btrfs/relocation.c

@@ -4058,7 +4058,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
 	       (unsigned long long)rc->block_group->flags);
 
 	btrfs_start_delalloc_inodes(fs_info->tree_root, 0);
-	btrfs_wait_ordered_extents(fs_info->tree_root, 0, 0);
+	btrfs_wait_ordered_extents(fs_info->tree_root, 0);
 
 	while (1) {
 		mutex_lock(&fs_info->cleaner_mutex);

fs/btrfs/super.c

@@ -852,7 +852,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
 		return 0;
 	}
 
-	btrfs_wait_ordered_extents(root, 0, 0);
+	btrfs_wait_ordered_extents(root, 0);
 
 	trans = btrfs_join_transaction_freeze(root);
 	if (IS_ERR(trans)) {

fs/btrfs/transaction.c

@@ -1475,7 +1475,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 
 		if (flush_on_commit || snap_pending) {
 			btrfs_start_delalloc_inodes(root, 1);
-			btrfs_wait_ordered_extents(root, 0, 1);
+			btrfs_wait_ordered_extents(root, 1);
 		}
 
 		ret = btrfs_run_delayed_items(trans, root);