--- old/src/hotspot/cpu/x86/c1_MacroAssembler_x86.hpp	2019-01-15 22:00:15.452805299 -0800
+++ new/src/hotspot/cpu/x86/c1_MacroAssembler_x86.hpp	2019-01-15 22:00:15.264798388 -0800
@@ -51,7 +51,7 @@
   // disp_hdr: must point to the displaced header location, contents preserved
   // scratch : scratch register, contents destroyed
   // returns code offset at which to add null check debug information
-  int lock_object  (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
+  int lock_object  (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case, bool check_always_locked);
 
   // unlocking
   // hdr     : contents destroyed