PAGE_RX
if (pgprot_val(pgprot) == pgprot_val(PAGE_RX))
pm[VM_EXEC] = PAGE_RX;
pm[VM_EXEC | VM_READ] = PAGE_RX;
pm[VM_EXEC | VM_WRITE] = PAGE_RX;
pm[VM_EXEC | VM_WRITE | VM_READ] = PAGE_RX;
pm[VM_SHARED | VM_EXEC] = PAGE_RX;
pm[VM_SHARED | VM_EXEC | VM_READ] = PAGE_RX;