--- old/src/share/vm/gc/g1/vm_operations_g1.hpp	2015-09-09 16:12:52.159861816 +0200
+++ new/src/share/vm/gc/g1/vm_operations_g1.hpp	2015-09-09 16:12:52.047861820 +0200
@@ -26,7 +26,6 @@
 #define SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP
 
 #include "gc/g1/g1AllocationContext.hpp"
-#include "gc/shared/gcId.hpp"
 #include "gc/shared/vmGCOperations.hpp"
 
 // VM_operations for the G1 collector.
@@ -105,7 +104,6 @@
   VoidClosure* _cl;
   const char* _printGCMessage;
   bool _needs_pll;
-  uint _gc_id;
 
 protected:
   // java.lang.ref.Reference support
@@ -114,7 +112,7 @@
 
 public:
   VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
-    : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll), _gc_id(GCId::current()) { }
+    : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
   virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
   virtual void doit();
   virtual bool doit_prologue();