src/hotspot/share/gc/shared/referenceProcessor.cpp

@@ -1029,11 +1029,11 @@
   // discovered_addr.
   oop current_head = refs_list.head();
   // The last ref must have its discovered field pointing to itself.
   oop next_discovered = (current_head != NULL) ? current_head : obj;
 
-  oop retest = HeapAccess<AS_NO_KEEPALIVE>::oop_atomic_cmpxchg(next_discovered, discovered_addr, oop(NULL));
+  oop retest = HeapAccess<AS_NO_KEEPALIVE>::oop_atomic_cmpxchg(discovered_addr, oop(NULL), next_discovered);
 
   if (retest == NULL) {
     // This thread just won the right to enqueue the object.
     // We have separate lists for enqueueing, so no synchronization
     // is necessary.