VOID
ExReleaseFastMutexUnsafe(
IN PFAST_MUTEX FastMutex
);
ExReleaseFastMutexUnsafe releases ownership of a fast mutex that was acquired with ExAcquireFastMutexUnsafe.
It is a programming error to call ExReleaseFastMutexUnsafe with a FastMutex that was acquired with ExAcquireFastMutex or ExTryToAcquireFastMutex.
Callers of ExReleaseFastMutexUnsafe must be running at IRQL < DISPATCH_LEVEL.