--- old/src/share/vm/gc/shared/genCollectedHeap.hpp	2016-03-10 16:29:20.592011882 +0100
+++ new/src/share/vm/gc/shared/genCollectedHeap.hpp	2016-03-10 16:29:20.474006921 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -281,6 +281,10 @@
     return UseConcMarkSweepGC;
   }
 
+  virtual bool needs_reference_pending_list_locker_thread() const {
+    return UseConcMarkSweepGC;
+  }
+
   // We don't need barriers for stores to objects in the
   // young gen and, a fortiori, for initializing stores to
   // objects therein. This applies to DefNew+Tenured and ParNew+CMS