btrfs_insert_root
ret = btrfs_insert_root(trans, tree_root, &root->root_key, &root->root_item);
ret = btrfs_insert_root(trans, fs_info->tree_root, &key,
ret = btrfs_insert_root(trans, fs_info->tree_root,
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
ret = btrfs_insert_root(trans, tree_root, &key, new_root_item);
ret = btrfs_insert_root(trans, fs_info->log_root_tree,