--- old/src/hotspot/share/runtime/mutexLocker.hpp	2019-07-08 11:17:33.000000000 -0700
+++ new/src/hotspot/share/runtime/mutexLocker.hpp	2019-07-08 11:17:32.000000000 -0700
@@ -122,6 +122,7 @@
 
 extern Mutex*   Management_lock;                 // a lock used to serialize JVM management
 extern Monitor* Service_lock;                    // a lock used for service thread operation
+extern Monitor* Notification_lock;               // a lock used for notification thread operation
 extern Monitor* PeriodicTask_lock;               // protects the periodic task structure
 extern Monitor* RedefineClasses_lock;            // locks classes from parallel redefinition
 extern Monitor* ThreadsSMRDelete_lock;           // Used by ThreadsSMRSupport to take pressure off the Threads_lock