--- old/src/hotspot/cpu/zero/cppInterpreter_zero.cpp	2017-10-13 11:44:52.357376334 -0400
+++ new/src/hotspot/cpu/zero/cppInterpreter_zero.cpp	2017-10-13 11:44:51.805502130 -0400
@@ -276,7 +276,7 @@
     markOop disp = lockee->mark()->set_unlocked();
 
     monitor->lock()->set_displaced_header(disp);
-    if (Atomic::cmpxchg(monitor, lockee->mark_addr(), disp) != disp) {
+    if (Atomic::cmpxchg((markOop)monitor, lockee->mark_addr(), disp) != disp) {
       if (thread->is_lock_owned((address) disp->clear_lock_bits())) {
         monitor->lock()->set_displaced_header(NULL);
       }
@@ -420,7 +420,7 @@
     monitor->set_obj(NULL);
 
     if (header != NULL) {
-      if (Atomic::cmpxchg(header, rcvr->mark_addr(), lock) != lock) {
+      if (Atomic::cmpxchg(header, rcvr->mark_addr(), (markOop)lock) != lock) {
         monitor->set_obj(rcvr); {
           HandleMark hm(thread);
           CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(thread, monitor));