{ The purpose of this request is to unlock pages which were previously locked
{ via the mmp$lock_pages request. All pages that are totally or partially
{ contained within the specified portion of the segment are unlocked.
{   If any pages in the specified portion of the segment are not locked
{ or are not in memory, the page is ignored and unlocking continues.
{
{       MMP$UNLOCK_PAGES (PVA, LENGTH, STATUS)
{
{ PVA: (input) This parameter specifies the start of the
{       range of memory to be unlocked.
{
{ LENGTH: (input) This parameter specifies the number of bytes
{       to be unlocked.
{
{ STATUS: (output) This parameter specifies the request status.
{       The possible error codes are:
{             mme$invalid_pva
{             mme$invalid_request
{             mme$lock_unlock_invalid_length
{             mme$not_valid_in_page_table
{             mme$page_not_in_page_table
{             mme$ref_to_unrecovered_file
{
