{0.4.8] cherry-pick [NTOSKRNL] Fix mismatching spinlock release in CcPerformReadAhead()

(cherry picked from commit dd392b9)
cherry-picked by Joachim Henze (as recommended by Pierre)

Author: HeisSpiter

ntoskrnl/cc/copy.c

@@ -597,7 +597,7 @@ CcPerformReadAhead(
         InterlockedAnd((volatile long *)&PrivateCacheMap->UlongFlags, 0xFFFEFFFF);
         KeReleaseSpinLockFromDpcLevel(&PrivateCacheMap->ReadAheadSpinLock);
     }
-    KeReleaseSpinLock(&PrivateCacheMap->ReadAheadSpinLock, OldIrql);
+    KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
 
     /* If file was locked, release it */
     if (Locked)