diff a/src/hotspot/share/gc/g1/g1ParScanThreadState.hpp b/src/hotspot/share/gc/g1/g1ParScanThreadState.hpp
--- a/src/hotspot/share/gc/g1/g1ParScanThreadState.hpp
+++ b/src/hotspot/share/gc/g1/g1ParScanThreadState.hpp
@@ -79,12 +79,10 @@
   size_t _surviving_words_length;
   // Indicates whether in the last generation (old) there is no more space
   // available for allocation.
   bool _old_gen_is_full;
 
-#define PADDING_ELEM_NUM (DEFAULT_CACHE_LINE_SIZE / sizeof(size_t))
-
   G1RedirtyCardsQueue& redirty_cards_queue()     { return _rdcq; }
   G1CardTable* ct()                              { return _ct; }
 
   G1HeapRegionAttr dest(G1HeapRegionAttr original) const {
     assert(original.is_valid(),