__rb_erase_augmented
struct rb_node *rebalance = __rb_erase_augmented(node, root, augment);
rebalance = __rb_erase_augmented(node, root, &dummy_callbacks);
struct rb_node *rebalance = __rb_erase_augmented(node, root, augment);
rebalance = __rb_erase_augmented(node, root, &dummy_callbacks);