--- a/hotspot/src/share/vm/gc_implementation/shared/markSweep.hpp	Tue Sep 28 09:51:37 2010 -0700
+++ b/hotspot/src/share/vm/gc_implementation/shared/markSweep.hpp	Tue Sep 28 15:56:15 2010 -0700
@@ -104,23 +104,22 @@
   friend class KeepAliveClosure;
   friend class VM_MarkSweep;
   friend void marksweep_init();
-  friend class DataLayout;
 
   //
   // Vars
   //
  protected:
   // Traversal stacks used during phase1
-  static GrowableArray<oop>*             _marking_stack;
-  static GrowableArray<ObjArrayTask>*    _objarray_stack;
+  static Stack<oop>                      _marking_stack;
+  static Stack<ObjArrayTask>             _objarray_stack;
   // Stack for live klasses to revisit at end of marking phase
-  static GrowableArray<Klass*>*          _revisit_klass_stack;
+  static Stack<Klass*>                   _revisit_klass_stack;
   // Set (stack) of MDO's to revisit at end of marking phase
-  static GrowableArray<DataLayout*>*    _revisit_mdo_stack;
+  static Stack<DataLayout*>              _revisit_mdo_stack;
 
   // Space for storing/restoring mark word
-  static GrowableArray<markOop>*         _preserved_mark_stack;
-  static GrowableArray<oop>*             _preserved_oop_stack;
+  static Stack<markOop>                  _preserved_mark_stack;
+  static Stack<oop>                      _preserved_oop_stack;
   static size_t                          _preserved_count;
   static size_t                          _preserved_count_max;
   static PreservedMark*                  _preserved_marks;