--- a/hotspot/src/share/vm/gc/g1/suspendibleThreadSet.hpp	Thu Mar 24 15:19:06 2016 +0000
+++ b/hotspot/src/share/vm/gc/g1/suspendibleThreadSet.hpp	Tue Mar 22 20:32:48 2016 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 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
@@ -45,6 +45,8 @@
   static bool   _suspend_all;
   static double _suspend_all_start;
 
+  static bool is_synchronized();
+
   // Add the current thread to the set. May block if a suspension is in progress.
   static void join();