diff -r 216f4f645fd8 -r ba006b931e27 hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.hpp
--- a/hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.hpp	Mon Sep 26 17:49:01 2016 +0300
+++ b/hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.hpp	Tue Sep 27 16:43:59 2016 -0400
@@ -540,7 +540,7 @@
 
   // Overflow list of grey objects, threaded through mark-word
   // Manipulated with CAS in the parallel/multi-threaded case.
-  oop _overflow_list;
+  oopDesc* volatile _overflow_list;
   // The following array-pair keeps track of mark words
   // displaced for accommodating overflow list above.
   // This code will likely be revisited under RFE#4922830.