--- a/src/hotspot/share/trace/tracingExport.cpp	Tue May 15 11:28:29 2018 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-/*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-#include "runtime/orderAccess.inline.hpp"
-#include "trace/tracingExport.hpp"
-
-// Allow lock-free reads of _sampler_thread.
-Thread* volatile TracingExport::_sampler_thread = NULL;
-
-Thread* TracingExport::sampler_thread_acquire() {
-  return (Thread*)OrderAccess::load_acquire(&_sampler_thread);
-}
-
-void TracingExport::set_sampler_thread_with_lock(Thread* thread) {
-  // Grab Threads_lock to avoid conflicts with Thread-SMR scans.
-  MutexLocker ml(Threads_lock);
-  assert(thread == NULL || _sampler_thread == NULL, "_sampler_thread should not already be set.");
-  // To match with the lock-free load_acquire():
-  OrderAccess::release_store(&_sampler_thread, thread);
-}