uvm_map_checkprot
uvm_map_checkprot(module_map, v, v + 1, prot);
if (uvm_map_checkprot(map, start, start + size - 1, VM_PROT_WRITE))
else if (uvm_map_checkprot(map, start, start + size - 1, VM_PROT_READ))
bool uvm_map_checkprot(struct vm_map *, vaddr_t,
rv = uvm_map_checkprot(kernel_map, saddr, eaddr, prot);
if (!uvm_map_checkprot(map, addr, addr + size, VM_PROT_NONE)) {