--- old/src/hotspot/share/runtime/thread.hpp	2019-10-17 17:29:21.000000000 -0400
+++ new/src/hotspot/share/runtime/thread.hpp	2019-10-17 17:29:20.000000000 -0400
@@ -414,11 +414,11 @@
 
   // Per-thread ObjectMonitor lists:
  public:
-  ObjectMonitor* om_free_list;                  // SLL of free ObjectMonitors
-  int om_free_count;                            // # on om_free_list
+  ObjectMonitor* volatile om_free_list;         // SLL of free ObjectMonitors
+  volatile int om_free_count;                   // # on om_free_list
   int om_free_provision;                        // # to try to allocate next
-  ObjectMonitor* om_in_use_list;                // SLL of in-use ObjectMonitors
-  int om_in_use_count;                          // # on om_in_use_list
+  ObjectMonitor* volatile om_in_use_list;       // SLL of in-use ObjectMonitors
+  volatile int om_in_use_count;                 // # on om_in_use_list
 
 #ifdef ASSERT
  private:
@@ -524,7 +524,6 @@
     os::set_native_thread_name(name);
   }
 
-  ObjectMonitor** om_in_use_list_addr()          { return (ObjectMonitor **)&om_in_use_list; }
   Monitor* SR_lock() const                       { return _SR_lock; }
 
   bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; }