diff -r 59065e5d56ec -r 6f18c23b0185 src/hotspot/share/runtime/safepoint.hpp
--- a/src/hotspot/share/runtime/safepoint.hpp	Wed Nov 14 09:19:31 2018 +0100
+++ b/src/hotspot/share/runtime/safepoint.hpp	Wed Nov 14 04:56:43 2018 -0500
@@ -178,10 +178,6 @@
 
   static address safepoint_counter_addr()                  { return (address)&_safepoint_counter; }
 
-  // This method is only used for -Xconcurrentio support.
-  static void set_defer_thr_suspend_loop_count() {
-    _defer_thr_suspend_loop_count = 1;
-  }
 };
 
 // Some helper assert macros for safepoint checks.