--- a/hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp	Thu Dec 10 14:24:26 2015 +0000
+++ b/hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp	Wed Dec 09 16:05:24 2015 +0100
@@ -96,6 +96,7 @@
   bool verify_task(StarTask ref) const;
 #endif // ASSERT
 
+  template <class T> void do_oop_ext(T* ref);
   template <class T> void push_on_queue(T* ref);
 
   template <class T> void update_rs(HeapRegion* from, T* p, oop o) {