--- old/src/share/vm/gc/g1/vm_operations_g1.hpp	2016-03-23 15:56:35.393025784 +0100
+++ new/src/share/vm/gc/g1/vm_operations_g1.hpp	2016-03-23 15:56:35.277020863 +0100
@@ -27,7 +27,6 @@
 
 #include "gc/g1/g1AllocationContext.hpp"
 #include "gc/shared/gcId.hpp"
-#include "gc/shared/referencePendingListLocker.hpp"
 #include "gc/shared/vmGCOperations.hpp"
 
 // VM_operations for the G1 collector.
@@ -103,20 +102,13 @@
 // Concurrent GC stop-the-world operations such as remark and cleanup;
 // consider sharing these with CMS's counterparts.
 class VM_CGC_Operation: public VM_Operation {
-  VoidClosure*               _cl;
-  const char*                _printGCMessage;
-  bool                       _needs_pending_list_lock;
-  ReferencePendingListLocker _pending_list_locker;
-  uint                       _gc_id;
-
-protected:
-  // java.lang.ref.Reference support
-  void acquire_pending_list_lock();
-  void release_and_notify_pending_list_lock();
+  VoidClosure* _cl;
+  const char*  _printGCMessage;
+  uint         _gc_id;
 
 public:
-  VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pending_list_lock)
-    : _cl(cl), _printGCMessage(printGCMsg), _needs_pending_list_lock(needs_pending_list_lock), _gc_id(GCId::current()) {}
+  VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg)
+    : _cl(cl), _printGCMessage(printGCMsg), _gc_id(GCId::current()) {}
   virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
   virtual void doit();
   virtual bool doit_prologue();