diff -r c7a3e57fdf4a -r b985cbb00e68 src/share/vm/runtime/mutexLocker.hpp
--- a/src/share/vm/runtime/mutexLocker.hpp	Thu Aug 01 03:44:03 2019 +0100
+++ b/src/share/vm/runtime/mutexLocker.hpp	Mon Aug 12 18:30:40 2019 +0300
@@ -142,12 +142,17 @@
 extern Monitor* Service_lock;                    // a lock used for service thread operation
 extern Monitor* PeriodicTask_lock;               // protects the periodic task structure
 
-#ifdef INCLUDE_TRACE
+#ifdef INCLUDE_JFR
 extern Mutex*   JfrStacktrace_lock;              // used to guard access to the JFR stacktrace table
 extern Monitor* JfrMsg_lock;                     // protects JFR messaging
 extern Mutex*   JfrBuffer_lock;                  // protects JFR buffer operations
 extern Mutex*   JfrStream_lock;                  // protects JFR stream access
 extern Mutex*   JfrThreadGroups_lock;            // protects JFR access to Thread Groups
+
+#ifndef SUPPORTS_NATIVE_CX8
+extern Mutex*   JfrCounters_lock;                // provides atomic updates of JFR counters
+#endif
+
 #endif
 
 #ifndef SUPPORTS_NATIVE_CX8