--- a/hotspot/src/share/vm/memory/generation.hpp	Wed Jun 27 15:23:36 2012 +0200
+++ b/hotspot/src/share/vm/memory/generation.hpp	Thu Jun 28 17:03:16 2012 -0400
@@ -86,7 +86,7 @@
 };
 
 
-class Generation: public CHeapObj {
+class Generation: public CHeapObj<mtGC> {
   friend class VMStructs;
  private:
   jlong _time_of_last_gc; // time when last gc on this generation happened (ms)