--- old/src/hotspot/share/runtime/mutexLocker.cpp	2019-07-08 11:17:31.000000000 -0700
+++ new/src/hotspot/share/runtime/mutexLocker.cpp	2019-07-08 11:17:30.000000000 -0700
@@ -128,6 +128,7 @@
 
 Mutex*   Management_lock              = NULL;
 Monitor* Service_lock                 = NULL;
+Monitor* Notification_lock            = NULL;
 Monitor* PeriodicTask_lock            = NULL;
 Monitor* RedefineClasses_lock         = NULL;
 
@@ -257,6 +258,7 @@
 
   def(Patching_lock                , PaddedMutex  , special,     true,  Monitor::_safepoint_check_never);      // used for safepointing and code patching.
   def(Service_lock                 , PaddedMonitor, special,     true,  Monitor::_safepoint_check_never);      // used for service thread operations
+  def(Notification_lock            , PaddedMonitor, special,     true,  Monitor::_safepoint_check_never);      // used for notification thread operations
   def(JmethodIdCreation_lock       , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_always); // used for creating jmethodIDs.
 
   def(SystemDictionary_lock        , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_always);