Re: [PATCH v2 21/24] pack-bitmap: factor out 'add_commit_to_bitmap()'

> +static int add_commit_to_bitmap(struct bitmap_index *bitmap_git,
> +				struct bitmap **base,
> +				struct commit *commit)
> +{
> +	struct ewah_bitmap *or_with = bitmap_for_commit(bitmap_git, commit);
> +
> +	if (!or_with)
> +		return 0;
> +
> +	if (*base == NULL)
> +		*base = ewah_to_bitmap(or_with);
> +	else
> +		bitmap_or_ewah(*base, or_with);
> +
> +	return 1;
> +}
> +
>  static struct bitmap *find_objects(struct bitmap_index *bitmap_git,
>  				   struct rev_info *revs,
>  				   struct object_list *roots,
> @@ -544,21 +561,10 @@ static struct bitmap *find_objects(struct bitmap_index *bitmap_git,
>  		struct object *object = roots->item;
>  		roots = roots->next;
>  
> -		if (object->type == OBJ_COMMIT) {
> -			khiter_t pos = kh_get_oid_map(bitmap_git->bitmaps, object->oid);
> -
> -			if (pos < kh_end(bitmap_git->bitmaps)) {
> -				struct stored_bitmap *st = kh_value(bitmap_git->bitmaps, pos);
> -				struct ewah_bitmap *or_with = lookup_stored_bitmap(st);