--- old/src/hotspot/share/runtime/mutexLocker.cpp	2020-01-31 17:22:39.394970250 -0500
+++ new/src/hotspot/share/runtime/mutexLocker.cpp	2020-01-31 17:22:39.098954325 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2020, 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
@@ -73,7 +73,6 @@
 Monitor* STS_lock                     = NULL;
 Monitor* FullGCCount_lock             = NULL;
 Monitor* G1OldGCCount_lock            = NULL;
-Monitor* DirtyCardQ_CBL_mon           = NULL;
 Mutex*   Shared_DirtyCardQ_lock       = NULL;
 Mutex*   MarkStackFreeList_lock       = NULL;
 Mutex*   MarkStackChunkList_lock      = NULL;
@@ -211,7 +210,6 @@
   if (UseG1GC) {
     def(G1OldGCCount_lock          , PaddedMonitor, leaf,        true,  _safepoint_check_always);
 
-    def(DirtyCardQ_CBL_mon         , PaddedMonitor, access,      true,  _safepoint_check_never);
     def(Shared_DirtyCardQ_lock     , PaddedMutex  , access + 1,  true,  _safepoint_check_never);
 
     def(FreeList_lock              , PaddedMutex  , leaf     ,   true,  _safepoint_check_never);