--- old/src/share/vm/gc/shared/cardTableModRefBSForCTRS.hpp	2016-04-06 17:17:34.694383789 +0200
+++ new/src/share/vm/gc/shared/cardTableModRefBSForCTRS.hpp	2016-04-06 17:17:34.590383787 +0200
@@ -80,7 +80,7 @@
   // covered region.  Each entry of these arrays is the lowest non-clean
   // card of the corresponding chunk containing part of an object from the
   // previous chunk, or else NULL.
-  typedef jbyte*  CardPtr;
+  typedef volatile jbyte*  CardPtr;
   typedef CardPtr* CardArr;
   CardArr* _lowest_non_clean;
   size_t*  _lowest_non_clean_chunk_size;
@@ -93,7 +93,7 @@
   // Ensures that these arrays are of sufficient size, allocating if necessary.
   // May be called by several threads concurrently.
   void get_LNC_array_for_space(Space* sp,
-                               jbyte**& lowest_non_clean,
+                               volatile jbyte**& lowest_non_clean,
                                uintptr_t& lowest_non_clean_base_chunk_index,
                                size_t& lowest_non_clean_chunk_size);
 
@@ -117,7 +117,7 @@
                       jint stride, int n_strides,
                       OopsInGenClosure* cl,
                       CardTableRS* ct,
-                      jbyte** lowest_non_clean,
+                      volatile jbyte** lowest_non_clean,
                       uintptr_t lowest_non_clean_base_chunk_index,
                       size_t lowest_non_clean_chunk_size);
 
@@ -128,7 +128,7 @@
                                 DirtyCardToOopClosure* dcto_cl,
                                 MemRegion chunk_mr,
                                 MemRegion used,
-                                jbyte** lowest_non_clean,
+                                volatile jbyte** lowest_non_clean,
                                 uintptr_t lowest_non_clean_base_chunk_index,
                                 size_t    lowest_non_clean_chunk_size);
 
@@ -140,4 +140,3 @@
 };
 
 #endif // include guard
-