diff -r 1c21c60f51bf -r 6a0c42c40cd1 src/hotspot/share/runtime/synchronizer.hpp
--- a/src/hotspot/share/runtime/synchronizer.hpp	Mon Oct 16 20:22:41 2017 +0000
+++ b/src/hotspot/share/runtime/synchronizer.hpp	Mon Oct 16 22:36:06 2017 -0400
@@ -25,6 +25,7 @@
 #ifndef SHARE_VM_RUNTIME_SYNCHRONIZER_HPP
 #define SHARE_VM_RUNTIME_SYNCHRONIZER_HPP
 
+#include "memory/padded.hpp"
 #include "oops/markOop.hpp"
 #include "runtime/basicLock.hpp"
 #include "runtime/handles.hpp"
@@ -159,9 +160,7 @@
  private:
   enum { _BLOCKSIZE = 128 };
   // global list of blocks of monitors
-  // gBlockList is really PaddedEnd<ObjectMonitor> *, but we don't
-  // want to expose the PaddedEnd template more than necessary.
-  static ObjectMonitor * volatile gBlockList;
+  static PaddedEnd<ObjectMonitor> * volatile gBlockList;
   // global monitor free list
   static ObjectMonitor * volatile gFreeList;
   // global monitor in-use list, for moribund threads,