int __btrfs_add_free_space(struct btrfs_block_group *block_group,
			   u64 offset, u64 bytes,
			   enum btrfs_trim_state trim_state)
static int __btrfs_add_free_space(struct btrfs_block_group *block_group,
			   u64 offset, u64 bytes,
			   enum btrfs_trim_state trim_state)