--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp	Tue Feb 10 17:41:19 2015 -0500
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp	Wed Feb 11 14:47:21 2015 +0100
@@ -64,7 +64,7 @@
   // The task manager
   static GCTaskManager* _gc_task_manager;
 
-  void trace_heap(GCWhen::Type when, GCTracer* tracer);
+  void trace_heap(GCWhen::Type when, const GCTracer* tracer);
 
  protected:
   static inline size_t total_invocations();