--- old/src/hotspot/share/gc/shared/genCollectedHeap.hpp	2017-11-28 11:57:12.662672426 +0100
+++ new/src/hotspot/share/gc/shared/genCollectedHeap.hpp	2017-11-28 11:57:12.401675454 +0100
@@ -79,7 +79,7 @@
   unsigned int _full_collections_completed;
 
   // Collects the given generation.
-  void collect_generation(Generation* gen, GCMemoryManager* mem_mgr, bool full, size_t size, bool is_tlab,
+  void collect_generation(Generation* gen, bool full, size_t size, bool is_tlab,
                           bool run_verification, bool clear_soft_refs,
                           bool restore_marks_for_biased_locking);
 
@@ -112,8 +112,8 @@
   // (gen-specific) roots processing.
   SubTasksDone* _process_strong_tasks;
 
-  GCMemoryManager* _young_mgr;
-  GCMemoryManager* _old_mgr;
+  GCMemoryManager* _young_manager;
+  GCMemoryManager* _old_manager;
 
   // Helper functions for allocation
   HeapWord* attempt_allocation(size_t size,