btrfs_orphan_cleanup
int btrfs_orphan_cleanup(struct btrfs_root *root);
ret = btrfs_orphan_cleanup(gang[i]);
if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) ||
(ret = btrfs_orphan_cleanup(fs_info->tree_root))) {
ret = btrfs_orphan_cleanup(sub_root);
btrfs_orphan_cleanup(root);
ret = btrfs_orphan_cleanup(pending_snapshot->snap);
ret = btrfs_orphan_cleanup(fs_root);