radix_tree_sum_node
if ((radix_tree_sum_node(n) & tagmask) != 0) {
assert((radix_tree_sum_node(n) & RADIX_TREE_TAG_MASK) ==
KASSERT(n == NULL || radix_tree_sum_node(n) == 0);
KASSERT(radix_tree_sum_node(n) == 0);
if (radix_tree_sum_node(n) != 0) {
if (radix_tree_sum_node(n) != 0) {
KASSERT(radix_tree_sum_node(n) != 0);
newmask = radix_tree_sum_node(n) & RADIX_TREE_TAG_MASK;