--- old/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2019-03-08 19:15:53.858759793 -0500
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2019-03-08 19:15:53.470739235 -0500
@@ -1682,12 +1682,10 @@
   // later, based on the concurrent refinement object.
   G1BarrierSet::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon,
                                                   &bs->dirty_card_queue_buffer_allocator(),
-                                                  Shared_DirtyCardQ_lock,
                                                   true); // init_free_ids
 
   dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon,
-                                    &bs->dirty_card_queue_buffer_allocator(),
-                                    Shared_DirtyCardQ_lock);
+                                    &bs->dirty_card_queue_buffer_allocator());
 
   // Create the hot card cache.
   _hot_card_cache = new G1HotCardCache(this);