/* return the block group that contains the given bytenr  */
struct btrfs_block_group_cache* btrfs_lookup_block_group(struct btrfs_fs_info *info, u64 bytenr)
/* return the block group that contains the given bytenr  */
struct btrfs_block_group_cache* btrfs_lookup_block_group(struct btrfs_fs_info *info, u64 bytenr)
{
	struct btrfs_block_group_cache *cache;
	cache = block_group_cache_tree_search(info, bytenr, 1);
	return cache;
}