--- old/src/share/vm/gc/g1/heapRegion.cpp	2016-04-06 17:17:23.950383662 +0200
+++ new/src/share/vm/gc/g1/heapRegion.cpp	2016-04-06 17:17:23.802383660 +0200
@@ -384,7 +384,7 @@
 oops_on_card_seq_iterate_careful(MemRegion mr,
                                  FilterOutOfRegionClosure* cl,
                                  bool filter_young,
-                                 jbyte* card_ptr) {
+                                 volatile jbyte* card_ptr) {
   // Currently, we should only have to clean the card if filter_young
   // is true and vice versa.
   if (filter_young) {
@@ -1093,4 +1093,3 @@
   set_saved_mark_word(NULL);
   reset_bot();
 }
-