8074561: Wrong volatile qualifier for field ClassLoaderDataGraphKlassIteratorAtomic::_next_klass

Reviewed-by: mgerdin, stefank

src/share/vm/classfile/classLoaderData.cpp

@@ -882,7 +882,7 @@ Klass* ClassLoaderDataGraphKlassIteratorAtomic::next_klass_in_cldg(Klass* klass)
 }
 
 Klass* ClassLoaderDataGraphKlassIteratorAtomic::next_klass() {
-  Klass* head = (Klass*)_next_klass;
+  Klass* head = _next_klass;
 
   while (head != NULL) {
     Klass* next = next_klass_in_cldg(head);

src/share/vm/classfile/classLoaderData.hpp

@@ -307,7 +307,7 @@ class ClassLoaderData : public CHeapObj<mtClass> {
 
 // An iterator that distributes Klasses to parallel worker threads.
 class ClassLoaderDataGraphKlassIteratorAtomic : public StackObj {
-  volatile Klass* _next_klass;
+ Klass* volatile _next_klass;
  public:
   ClassLoaderDataGraphKlassIteratorAtomic();
   Klass* next_klass();