--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2015-01-27 17:28:14.890437954 -0500
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2015-01-27 17:28:14.778431479 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2015, 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
@@ -800,7 +800,6 @@
   // The concurrent marker (and the thread it runs in.)
   ConcurrentMark* _cm;
   ConcurrentMarkThread* _cmThread;
-  bool _mark_in_progress;
 
   // The concurrent refiner.
   ConcurrentG1Refine* _cg1r;
@@ -1443,15 +1442,9 @@
   void markModUnionRange(MemRegion mr);
 
   // Records the fact that a marking phase is no longer in progress.
-  void set_marking_complete() {
-    _mark_in_progress = false;
-  }
-  void set_marking_started() {
-    _mark_in_progress = true;
-  }
-  bool mark_in_progress() {
-    return _mark_in_progress;
-  }
+  void set_marking_complete();
+  void set_marking_started();
+  bool mark_in_progress();
 
   // Print the maximum heap capacity.
   virtual size_t max_capacity() const;