--- a/hotspot/src/share/vm/gc/shared/barrierSet.hpp	Wed Sep 02 16:16:58 2015 +0200
+++ b/hotspot/src/share/vm/gc/shared/barrierSet.hpp	Wed Sep 02 11:41:42 2015 -0400
@@ -145,7 +145,7 @@
   // ...then the post-write version.
   inline void write_ref_field(void* field, oop new_val, bool release = false);
 protected:
-  virtual void write_ref_field_work(void* field, oop new_val, bool release = false) = 0;
+  virtual void write_ref_field_work(void* field, oop new_val, bool release) = 0;
 public:
 
   // Invoke the barrier, if any, necessary when writing the "bytes"-byte