--- a/hotspot/src/share/vm/gc/shared/generation.hpp	Tue Sep 20 20:22:19 2016 +0200
+++ b/hotspot/src/share/vm/gc/shared/generation.hpp	Tue Sep 20 15:42:17 2016 -0400
@@ -263,7 +263,7 @@
   // These functions return the addresses of the fields that define the
   // boundaries of the contiguous allocation area.  (These fields should be
   // physically near to one another.)
-  virtual HeapWord** top_addr() const { return NULL; }
+  virtual HeapWord* volatile* top_addr() const { return NULL; }
   virtual HeapWord** end_addr() const { return NULL; }
 
   // Thread-local allocation buffers