diff -r 02f49b66361a -r 455328d90876 src/share/vm/gc_implementation/g1/heapRegionSet.hpp
--- a/src/share/vm/gc_implementation/g1/heapRegionSet.hpp	Mon Mar 28 10:58:54 2011 -0700
+++ b/src/share/vm/gc_implementation/g1/heapRegionSet.hpp	Tue Mar 29 22:36:16 2011 -0400
@@ -277,6 +277,10 @@
   }
 
 public:
+  // It adds hr to the list as the new head. The region should not be
+  // a member of another set.
+  inline void add_as_head(HeapRegion* hr);
+
   // It adds hr to the list as the new tail. The region should not be
   // a member of another set.
   inline void add_as_tail(HeapRegion* hr);
@@ -290,6 +294,11 @@
 
   // It moves the regions from from_list to this list and empties
   // from_list. The new regions will appear in the same order as they
+  // were in from_list and be linked in the beginning of this list.
+  void add_as_head(HeapRegionLinkedList* from_list);
+
+  // It moves the regions from from_list to this list and empties
+  // from_list. The new regions will appear in the same order as they
   // were in from_list and be linked in the end of this list.
   void add_as_tail(HeapRegionLinkedList* from_list);