metaslab_weight_from_range_tree
weight = metaslab_weight_from_range_tree(msp);
static uint64_t metaslab_weight_from_range_tree(metaslab_t *msp);
uint64_t weight = metaslab_weight_from_range_tree(msp);
weight = metaslab_weight_from_range_tree(msp);
metaslab_weight_from_range_tree(msp));
metaslab_weight_from_range_tree(msp));