[NTOSKRNL/IO]

- Always use interlocked operations on DeviceObject->ReferenceCount

svn path=/trunk/; revision=55128

reactos/ntoskrnl/io/iomgr/device.c

@@ -486,7 +486,7 @@ IopDereferenceDeviceObject(IN PDEVICE_OBJECT DeviceObject,
     ASSERT(DeviceObject->ReferenceCount);
 
     /* Dereference the device */
-    DeviceObject->ReferenceCount--;
+    InterlockedDecrement(&DeviceObject->ReferenceCount);
 
     /*
      * Check if we can unload it and it's safe to unload (or if we're forcing

reactos/ntoskrnl/io/iomgr/file.c

@@ -157,7 +157,7 @@ IopCheckDeviceAndDriver(IN POPEN_PACKET OpenPacket,
     else
     {
         /* Increase reference count */
-        DeviceObject->ReferenceCount++;
+        InterlockedIncrement(&DeviceObject->ReferenceCount);
         return STATUS_SUCCESS;
     }
 }