Function rn_detachhead

freebsd/net/radix.c:1172–1189

}

int
rn_detachhead(void **head)
{
	struct radix_node_head *rnh;

	KASSERT((head != NULL && *head != NULL),
	    ("%s: head already freed", __func__));

	rnh = (struct radix_node_head *)(*head);

	rn_walktree(&rnh->rh.rnh_masks->head, rn_freeentry, rnh->rh.rnh_masks);
	rn_detachhead_internal(&rnh->rh.rnh_masks->head);
	rn_detachhead_internal(&rnh->rh);

	*head = NULL;

	return (1);
}