--- old/src/hotspot/share/runtime/thread.hpp	2019-08-28 15:04:04.222957238 -0400
+++ new/src/hotspot/share/runtime/thread.hpp	2019-08-28 15:04:04.026957245 -0400
@@ -410,12 +410,11 @@
 
   // 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
-  volatile bool om_request_deflation;           // request deflation of idle monitors
+  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: