--- old/src/share/vm/gc_implementation/g1/heapRegion.hpp	2013-06-04 17:03:23.895740643 +0200
+++ new/src/share/vm/gc_implementation/g1/heapRegion.hpp	2013-06-04 17:03:23.731740638 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -354,6 +354,8 @@
                                       ~((1 << (size_t) LogOfHRGrainBytes) - 1);
   }
 
+  // return the (conservative) maximum heap alignment for any heap region
+  static size_t max_heap_alignment();
   // It sets up the heap region size (GrainBytes / GrainWords), as
   // well as other related fields that are based on the heap region
   // size (LogOfHRGrainBytes / LogOfHRGrainWords /