--- a/hotspot/src/cpu/aarch64/vm/macroAssembler_aarch64.hpp	Tue May 09 13:50:06 2017 -0400
+++ b/hotspot/src/cpu/aarch64/vm/macroAssembler_aarch64.hpp	Thu Oct 13 11:27:20 2016 +0200
@@ -974,6 +974,8 @@
 
   // Various forms of CAS
 
+  void cmpxchg_obj_header(Register oldv, Register newv, Register obj, Register tmp,
+                          Label &suceed, Label *fail);
   void cmpxchgptr(Register oldv, Register newv, Register addr, Register tmp,
                   Label &suceed, Label *fail);