VOID __stdcall FsRtlLookupLastLargeMcbEntry(_LARGE_MCB *Mcb, INT64 *LargeVbn, INT64 *LargeLbn){ ExAcquireFastMutex(Mcb->GuardedMutex); FsRtlLookupLastBaseMcbEntry(&Mcb->BaseMcb, LargeVbn, LargeLbn); KeReleaseGuardedMutex(Mcb->GuardedMutex); }