PnpWaitForEmptyDeviceActionQueue

VOID __fastcall PnpWaitForEmptyDeviceActionQueue(UINT64 *a1){
  KeWaitForSingleObject(&PnpEnumerationLock, Executive, 0, 0, 0i64);
}

Referenced by:

IopInitializeBootDrivers
PipInitializeCoreDriversByGroup
PnpWaitForDevicesToStart
PopGracefulShutdown