--- a/src/hotspot/share/runtime/mutexLocker.cpp	Mon Apr 29 14:34:10 2019 -0400
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Mon Apr 29 16:01:52 2019 -0400
@@ -216,9 +216,7 @@
   def(ResolvedMethodTableWeakAlloc_lock    , PaddedMutex  , vmweak,      true,  Monitor::_safepoint_check_never);
   def(ResolvedMethodTableWeakActive_lock   , PaddedMutex  , vmweak-1,    true,  Monitor::_safepoint_check_never);
 
-  if (UseConcMarkSweepGC || UseG1GC) {
-    def(FullGCCount_lock           , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_never);      // in support of ExplicitGCInvokesConcurrent
-  }
+  def(FullGCCount_lock             , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_never);      // in support of ExplicitGCInvokesConcurrent
   if (UseG1GC) {
     def(SATB_Q_CBL_mon             , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);