ZwSetSystemTime

NTSTATUS __stdcall ZwSetSystemTime(LARGE_INTEGER *SystemTime, LARGE_INTEGER *PreviousTime){
  NTSTATUS result; 
  _disable();
  __readeflags();
  KiServiceInternal();
  return result;
}

Referenced by:

ExpTimeZoneInitSiloState
ExpTimeZoneWork
Phase1InitializationDiscard