uvm_map_submap    249 uvm/uvm_km.c   	if (uvm_map_submap(map, *min, *max, submap) != 0)
uvm_map_submap    309 uvm/uvm_map.h  int		uvm_map_submap(vm_map_t, vaddr_t, vaddr_t, vm_map_t);