--- old/src/share/vm/gc/g1/g1HotCardCache.hpp	2016-04-06 17:17:21.510383633 +0200
+++ new/src/share/vm/gc/g1/g1HotCardCache.hpp	2016-04-06 17:17:21.414383632 +0200
@@ -63,7 +63,7 @@
 
 
   // The card cache table
-  jbyte**           _hot_cache;
+  volatile jbyte**           _hot_cache;
 
   size_t            _hot_cache_size;
 
@@ -108,7 +108,7 @@
   // adding, NULL is returned and no further action in needed.
   // If we evict a card from the cache to make room for the new card,
   // the evicted card is then returned for refinement.
-  jbyte* insert(jbyte* card_ptr);
+  volatile jbyte* insert(volatile jbyte* card_ptr);
 
   // Refine the cards that have delayed as a result of
   // being in the cache.