rack_alloc_limit
nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT);
static struct rack_sendmap *rack_alloc_limit(struct tcp_rack *rack,
nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT);
nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT);