--- a/src/share/vm/prims/unsafe.cpp	Wed Oct 09 13:00:20 2013 +0200
+++ b/src/share/vm/prims/unsafe.cpp	Wed Oct 09 05:03:34 2013 -0700
@@ -292,9 +292,9 @@
   volatile oop v;
   if (UseCompressedOops) {
     volatile narrowOop n = *(volatile narrowOop*) addr;
-    v = oopDesc::decode_heap_oop(n);
+    (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n));
   } else {
-    v = *(volatile oop*) addr;
+    (void)const_cast<oop&>(v = *(volatile oop*) addr);
   }
   OrderAccess::acquire();
   return JNIHandles::make_local(env, v);
@@ -1222,9 +1222,9 @@
 #endif /* USDT2 */
   if (event.should_commit()) {
     oop obj = thread->current_park_blocker();
-    event.set_klass(obj ? obj->klass() : NULL);
+    event.set_klass((obj != NULL) ? obj->klass() : NULL);
     event.set_timeout(time);
-    event.set_address(obj ? (TYPE_ADDRESS) (uintptr_t) obj : 0);
+    event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0);
     event.commit();
   }
 UNSAFE_END