+ SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+
+ if (DisableReadAhead)
+ {
+ SetFlag(SharedCacheMap->Flags, READAHEAD_DISABLED);
+ }
+ else
+ {
+ ClearFlag(SharedCacheMap->Flags, READAHEAD_DISABLED);
+ }
+
+ if (DisableWriteBehind)
+ {
+ /* FIXME: also set flag 0x200 */
+ SetFlag(SharedCacheMap->Flags, WRITEBEHIND_DISABLED);
+ }
+ else
+ {
+ ClearFlag(SharedCacheMap->Flags, WRITEBEHIND_DISABLED);
+ }
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);