--- old/src/hotspot/share/runtime/os.hpp	2018-08-09 10:42:20.482115450 -0400
+++ new/src/hotspot/share/runtime/os.hpp	2018-08-09 10:42:20.242115458 -0400
@@ -897,7 +897,6 @@
   static int java_to_os_priority[CriticalPriority + 1];
   // Hint to the underlying OS that a task switch would not be good.
   // Void return because it's a hint and can fail.
-  static void hint_no_preempt();
   static const char* native_thread_creation_failed_msg() {
     return OS_NATIVE_THREAD_CREATION_FAILED_MSG;
   }