<snip>
> + * This helper is here to determine if that's the case.
> + */
> +static inline bool btrfs_backref_has_tree_block_info(
> + struct btrfs_backref_iterator *iterator)
> +{
> + if (iterator->cur_key.type == BTRFS_EXTENT_ITEM_KEY &&
> + iterator->cur_ptr - iterator->item_ptr ==
> + sizeof(struct btrfs_extent_item))
> + return true;
> + return false;
> +}
> +
> +int btrfs_backref_iterator_start(struct btrfs_backref_iterator *iterator,
> + u64 bytenr);
> +int btrfs_backref_iterator_next(struct btrfs_backref_iterator *iterator);
You are exposing a function here which is not implemented. Remove this
line and add it in the next patch where you actually introduce
iterator_next.
> +
> #endif
>
