--- a/hotspot/src/share/vm/gc/g1/g1ConcurrentMark.cpp	Tue Apr 12 14:46:02 2016 -0400
+++ b/hotspot/src/share/vm/gc/g1/g1ConcurrentMark.cpp	Wed Apr 13 17:00:54 2016 -0400
@@ -2112,6 +2112,10 @@
   _parallel_workers->print_worker_threads_on(st);
 }
 
+void G1ConcurrentMark::threads_do(ThreadClosure* tc) const {
+  _parallel_workers->threads_do(tc);
+}
+
 void G1ConcurrentMark::print_on_error(outputStream* st) const {
   st->print_cr("Marking Bits (Prev, Next): (CMBitMap*) " PTR_FORMAT ", (CMBitMap*) " PTR_FORMAT,
       p2i(_prevMarkBitMap), p2i(_nextMarkBitMap));