--- old/src/share/vm/gc/g1/g1MarkSweep.cpp	2015-06-22 11:04:42.402672393 +0200
+++ new/src/share/vm/gc/g1/g1MarkSweep.cpp	2015-06-22 11:04:42.286671818 +0200
@@ -74,7 +74,7 @@
   assert(rp != NULL, "should be non-NULL");
   assert(rp == G1CollectedHeap::heap()->ref_processor_stw(), "Precondition");
 
-  GenMarkSweep::_ref_processor = rp;
+  GenMarkSweep::set_ref_processor(rp);
   rp->setup_policy(clear_all_softrefs);
 
   // When collecting the permanent generation Method*s may be moving,
@@ -108,7 +108,7 @@
   JvmtiExport::gc_epilogue();
 
   // refs processing: clean slate
-  GenMarkSweep::_ref_processor = NULL;
+  GenMarkSweep::set_ref_processor(NULL);
 }