btrfs_alloc_log_tree_node
int ret = btrfs_alloc_log_tree_node(trans, log_root);
ret = btrfs_alloc_log_tree_node(trans, log_root);
int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans,
ret = btrfs_alloc_log_tree_node(trans, log_root_tree);