btrfs_find_first_clear_extent_bit
void btrfs_find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
btrfs_find_first_clear_extent_bit(&device->alloc_state, start,
btrfs_find_first_clear_extent_bit(&tree, 0, &start, &end, CHUNK_TRIMMED);
btrfs_find_first_clear_extent_bit(&tree, SZ_512K, &start, &end,
btrfs_find_first_clear_extent_bit(&tree, 12 * SZ_1M, &start, &end,
btrfs_find_first_clear_extent_bit(&tree, SZ_2M, &start, &end,
btrfs_find_first_clear_extent_bit(&tree, SZ_64M + SZ_1M, &start, &end,
btrfs_find_first_clear_extent_bit(&tree, SZ_64M - SZ_8M, &start, &end,
btrfs_find_first_clear_extent_bit(&tree, -1, &start, &end, CHUNK_TRIMMED);