indirect_split_t
indirect_split_t *is =
malloc(offsetof(indirect_split_t, is_child[n]));
bzero(is, offsetof(indirect_split_t, is_child[n]));
indirect_split_t *is;
indirect_split_t *first;
sizeof (indirect_split_t), offsetof(indirect_split_t, is_node));
for (indirect_split_t *is = list_head(&iv->iv_splits);