--- old/src/share/vm/gc/parallel/parallelScavengeHeap.hpp	2016-09-12 15:41:07.682114538 +0200
+++ new/src/share/vm/gc/parallel/parallelScavengeHeap.hpp	2016-09-12 15:41:07.574114533 +0200
@@ -175,7 +175,7 @@
 
   bool supports_inline_contig_alloc() const { return !UseNUMA; }
 
-  HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; }
+  HeapWord* volatile* top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord* volatile*)-1; }
   HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; }
 
   void ensure_parsability(bool retire_tlabs);