vm_map_check_protection
if (vm_map_check_protection(map, pageno, pageno +
rv = vm_map_check_protection(kernel_map, saddr, eaddr, prot);
rv = vm_map_check_protection(map, trunc_page((vm_offset_t)addr),
boolean_t vm_map_check_protection (vm_map_t, vm_offset_t, vm_offset_t, vm_prot_t);
if (vm_map_check_protection(map, entry->start,