--- a/src/hotspot/share/runtime/threadSMR.inline.hpp	Thu Apr 25 05:54:54 2019 -0700
+++ b/src/hotspot/share/runtime/threadSMR.inline.hpp	Thu Apr 25 10:56:31 2019 -0400
@@ -82,7 +82,7 @@
 }
 
 inline bool ThreadsSMRSupport::is_a_protected_JavaThread_with_lock(JavaThread *thread) {
-  MutexLockerEx ml(Threads_lock->owned_by_self() ? NULL : Threads_lock);
+  MutexLocker ml(Threads_lock->owned_by_self() ? NULL : Threads_lock);
   return is_a_protected_JavaThread(thread);
 }