--- a/src/hotspot/cpu/x86/macroAssembler_x86.hpp	Thu Nov 08 11:22:28 2018 -0800
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.hpp	Thu Nov 08 11:45:13 2018 -0800
@@ -644,9 +644,6 @@
                                                 Register tmp,
                                                 int offset);
 
-  // Support for serializing memory accesses between threads
-  void serialize_memory(Register thread, Register tmp);
-
   // If thread_reg is != noreg the code assumes the register passed contains
   // the thread (required on 64 bit).
   void safepoint_poll(Label& slow_path, Register thread_reg, Register temp_reg);