--- old/src/share/vm/gc/g1/concurrentMark.hpp	2015-09-08 13:23:19.695225827 +0200
+++ new/src/share/vm/gc/g1/concurrentMark.hpp	2015-09-08 13:23:19.587225831 +0200
@@ -425,7 +425,6 @@
   volatile bool           _concurrent;
   // Set at the end of a Full GC so that marking aborts
   volatile bool           _has_aborted;
-  GCId                    _aborted_gc_id;
 
   // Used when remark aborts due to an overflow to indicate that
   // another concurrent marking phase should start
@@ -768,8 +767,6 @@
 
   bool has_aborted()      { return _has_aborted; }
 
-  const GCId& concurrent_gc_id();
-
   // This prints the global/local fingers. It is used for debugging.
   NOT_PRODUCT(void print_finger();)