--- a/hotspot/src/share/vm/gc/serial/defNewGeneration.hpp	Thu May 21 09:23:46 2015 +0200
+++ b/hotspot/src/share/vm/gc/serial/defNewGeneration.hpp	Thu May 21 09:35:38 2015 +0200
@@ -255,7 +255,7 @@
   // Iteration
   void object_iterate(ObjectClosure* blk);
 
-  void younger_refs_iterate(OopsInGenClosure* cl);
+  void younger_refs_iterate(OopsInGenClosure* cl, uint n_threads);
 
   void space_iterate(SpaceClosure* blk, bool usedOnly = false);