--- a/src/hotspot/share/runtime/mutexLocker.cpp	Sat Jan 19 11:20:01 2019 +0100
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Sat Jan 19 19:50:01 2019 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, 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
@@ -79,10 +79,8 @@
 Monitor* CGC_lock                     = NULL;
 Monitor* STS_lock                     = NULL;
 Monitor* FullGCCount_lock             = NULL;
-Mutex*   SATB_Q_FL_lock               = NULL;
 Monitor* SATB_Q_CBL_mon               = NULL;
 Mutex*   Shared_SATB_Q_lock           = NULL;
-Mutex*   DirtyCardQ_FL_lock           = NULL;
 Monitor* DirtyCardQ_CBL_mon           = NULL;
 Mutex*   Shared_DirtyCardQ_lock       = NULL;
 Mutex*   MarkStackFreeList_lock       = NULL;
@@ -214,11 +212,9 @@
     def(FullGCCount_lock           , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_never);      // in support of ExplicitGCInvokesConcurrent
   }
   if (UseG1GC) {
-    def(SATB_Q_FL_lock             , PaddedMutex  , access,      true,  Monitor::_safepoint_check_never);
     def(SATB_Q_CBL_mon             , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);
     def(Shared_SATB_Q_lock         , PaddedMutex  , access + 1,  true,  Monitor::_safepoint_check_never);
 
-    def(DirtyCardQ_FL_lock         , PaddedMutex  , access,      true,  Monitor::_safepoint_check_never);
     def(DirtyCardQ_CBL_mon         , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);
     def(Shared_DirtyCardQ_lock     , PaddedMutex  , access + 1,  true,  Monitor::_safepoint_check_never);
 
@@ -235,7 +231,6 @@
     def(MonitoringSupport_lock     , PaddedMutex  , native   ,   true,  Monitor::_safepoint_check_never);      // used for serviceability monitoring support
   }
   if (UseShenandoahGC) {
-    def(SATB_Q_FL_lock             , PaddedMutex  , access,      true,  Monitor::_safepoint_check_never);
     def(SATB_Q_CBL_mon             , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);
     def(Shared_SATB_Q_lock         , PaddedMutex  , access + 1,  true,  Monitor::_safepoint_check_never);