--- old/src/hotspot/os/linux/gc/z/zPhysicalMemoryBacking_linux.hpp	2020-01-15 13:47:37.619448260 +0100
+++ /dev/null	2020-01-07 09:26:22.747784373 +0100
@@ -1,72 +0,0 @@
-/*
- * Copyright (c) 2015, 2019, 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.
- */
-
-#ifndef OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
-#define OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
-
-#include "gc/z/zBackingFile_linux.hpp"
-#include "gc/z/zMemory.hpp"
-
-class ZErrno;
-class ZPhysicalMemory;
-
-class ZPhysicalMemoryBacking {
-private:
-  ZBackingFile   _file;
-  ZMemoryManager _committed;
-  ZMemoryManager _uncommitted;
-
-  void warn_available_space(size_t max) const;
-  void warn_max_map_count(size_t max) const;
-
-  void map_failed(ZErrno err) const;
-
-  void advise_view(uintptr_t addr, size_t size, int advice) const;
-  void pretouch_view(uintptr_t addr, size_t size) const;
-  void map_view(const ZPhysicalMemory& pmem, uintptr_t addr) const;
-  void unmap_view(const ZPhysicalMemory& pmem, uintptr_t addr) const;
-
-public:
-  bool is_initialized() const;
-
-  void warn_commit_limits(size_t max) const;
-  bool supports_uncommit();
-
-  size_t commit(size_t size);
-  size_t uncommit(size_t size);
-
-  ZPhysicalMemory alloc(size_t size);
-  void free(const ZPhysicalMemory& pmem);
-
-  uintptr_t nmt_address(uintptr_t offset) const;
-
-  void pretouch(uintptr_t offset, size_t size) const;
-
-  void map(const ZPhysicalMemory& pmem, uintptr_t offset) const;
-  void unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const;
-
-  void debug_map(const ZPhysicalMemory& pmem, uintptr_t offset) const;
-  void debug_unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const;
-};
-
-#endif // OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP