Btrfs: remove redundant btrfs_balance_delayed_items

In functions like btrfs_create(), we run both
btrfs_balance_delayed_items() and btrfs_btree_balance_dirty() after
the operation, but btrfs_btree_balance_dirty() is surely going to run
btrfs_balance_delayed_items().

This keeps only btrfs_btree_balance_dirty().

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/inode.c

@@ -6560,7 +6560,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
 
 out_unlock:
 	btrfs_end_transaction(trans);
-	btrfs_balance_delayed_items(fs_info);
 	btrfs_btree_balance_dirty(fs_info);
 	if (drop_inode) {
 		inode_dec_link_count(inode);
@@ -6641,7 +6640,6 @@ out_unlock:
 		inode_dec_link_count(inode);
 		iput(inode);
 	}
-	btrfs_balance_delayed_items(fs_info);
 	btrfs_btree_balance_dirty(fs_info);
 	return err;
 
@@ -6716,7 +6714,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
 		btrfs_log_new_name(trans, BTRFS_I(inode), NULL, parent);
 	}
 
-	btrfs_balance_delayed_items(fs_info);
 fail:
 	if (trans)
 		btrfs_end_transaction(trans);
@@ -6794,7 +6791,6 @@ out_fail:
 		inode_dec_link_count(inode);
 		iput(inode);
 	}
-	btrfs_balance_delayed_items(fs_info);
 	btrfs_btree_balance_dirty(fs_info);
 	return err;
 
@@ -10688,7 +10684,6 @@ out:
 	btrfs_end_transaction(trans);
 	if (ret)
 		iput(inode);
-	btrfs_balance_delayed_items(fs_info);
 	btrfs_btree_balance_dirty(fs_info);
 	return ret;