VOID
KeLeaveCriticalRegion(
);
KeLeaveCriticalRegion re-enables the delivery of special kernel APCs that was disabled by a preceding call to KeEnterCriticalRegion.
Highest-level drivers can call this routine while running in the context of the thread that requested the current I/O operation.
Callers of KeLeaveCriticalRegion must be running at IRQL PASSIVE_LEVEL.