VOID __stdcall PopRunNormalIrpWorkers(){ ExAcquireFastMutex((PFAST_MUTEX)((char *)&PopIrpWorkerControlEvent + 64)); PopCreateIrpWorkerAllowed = 1; KeReleaseGuardedMutex((PKGUARDED_MUTEX)((char *)&PopIrpWorkerControlEvent + 64)); }