--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Fri May 22 10:58:16 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Fri May 22 13:35:29 2015 +0200
@@ -981,6 +981,8 @@
 
   RefToScanQueue *task_queue(uint i) const;
 
+  uint num_task_queues() const;
+
   // A set of cards where updates happened during the GC
   DirtyCardQueueSet& dirty_card_queue_set() { return _dirty_card_queue_set; }