diff -r 643e2fbeccc3 -r a6d6dd711998 hotspot/src/share/vm/gc/shared/genRemSet.cpp
--- a/hotspot/src/share/vm/gc/shared/genRemSet.cpp	Thu Oct 22 11:13:08 2015 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,77 +0,0 @@
-/*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-#include "classfile/classLoaderData.hpp"
-#include "gc/shared/cardTableRS.hpp"
-#include "gc/shared/genRemSet.hpp"
-#include "oops/klass.hpp"
-
-// This kind of "BarrierSet" allows a "CollectedHeap" to detect and
-// enumerate ref fields that have been modified (since the last
-// enumeration.)
-
-uintx GenRemSet::max_alignment_constraint() {
-  return CardTableRS::ct_max_alignment_constraint();
-}
-
-class HasAccumulatedModifiedOopsClosure : public KlassClosure {
-  bool _found;
- public:
-  HasAccumulatedModifiedOopsClosure() : _found(false) {}
-  void do_klass(Klass* klass) {
-    if (_found) {
-      return;
-    }
-
-    if (klass->has_accumulated_modified_oops()) {
-      _found = true;
-    }
-  }
-  bool found() {
-    return _found;
-  }
-};
-
-bool KlassRemSet::mod_union_is_clear() {
-  HasAccumulatedModifiedOopsClosure closure;
-  ClassLoaderDataGraph::classes_do(&closure);
-
-  return !closure.found();
-}
-
-
-class ClearKlassModUnionClosure : public KlassClosure {
- public:
-  void do_klass(Klass* klass) {
-    if (klass->has_accumulated_modified_oops()) {
-      klass->clear_accumulated_modified_oops();
-    }
-  }
-};
-
-void KlassRemSet::clear_mod_union() {
-  ClearKlassModUnionClosure closure;
-  ClassLoaderDataGraph::classes_do(&closure);
-}