KeEnterCriticalRegion

VOID KeEnterCriticalRegion(void){
  _ETHREAD *CurrentThread; 
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  --*((_WORD *)CurrentThread + 242);
}

Referenced by:

CmFcManagerUpdateFeatureConfigurations
EtwpAddGuidEntry
EtwpCoverageSamplerStart
EtwpNotifyGuid
ExpQuerySystemInformation
NtSetSystemInformation
SepFilterToken