ViExCheckAPCLevelOrBelow

UINT8 __stdcall ViExCheckAPCLevelOrBelow(UINT64 BugcheckSubcode, PVOID Lock, UINT64 DisableChecks){
  UINT8 CurrentIrql; 
  UINT64 v5; 
  CurrentIrql = KeGetCurrentIrql();
  if( !(_DWORD)DisableChecks && CurrentIrql > 1u )
    VerifierBugCheckIfAppropriate(0xC4ui64, 0x33ui64, CurrentIrql, (UINT64)Lock, 0i64, v5);
  return CurrentIrql;
}

Referenced by:

VerifierExAcquireFastMutex
VerifierExAcquireFastMutexNoReboot
ViExTryToAcquireFastMutexCommon