diff -r f052c884af39 -r 2faaa38c86a4 src/hotspot/os_cpu/linux_x86/gc/z/zBackingFile_linux_x86.hpp
--- a/src/hotspot/os_cpu/linux_x86/gc/z/zBackingFile_linux_x86.hpp	Wed Aug 28 11:52:20 2019 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,73 +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_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP
-#define OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP
-
-#include "memory/allocation.hpp"
-
-class ZErrno;
-
-class ZBackingFile {
-private:
-  int      _fd;
-  size_t   _size;
-  uint64_t _filesystem;
-  size_t   _block_size;
-  size_t   _available;
-  bool     _initialized;
-
-  int create_mem_fd(const char* name) const;
-  int create_file_fd(const char* name) const;
-  int create_fd(const char* name) const;
-
-  bool is_tmpfs() const;
-  bool is_hugetlbfs() const;
-  bool tmpfs_supports_transparent_huge_pages() const;
-
-  ZErrno fallocate_compat_ftruncate(size_t size) const;
-  ZErrno fallocate_compat_mmap(size_t offset, size_t length, bool reserve_only) const;
-  ZErrno fallocate_compat_pwrite(size_t offset, size_t length) const;
-  ZErrno fallocate_fill_hole_compat(size_t offset, size_t length);
-  ZErrno fallocate_fill_hole_syscall(size_t offset, size_t length);
-  ZErrno fallocate_fill_hole(size_t offset, size_t length);
-  ZErrno fallocate_punch_hole(size_t offset, size_t length);
-  ZErrno split_and_fallocate(bool punch_hole, size_t offset, size_t length);
-  ZErrno fallocate(bool punch_hole, size_t offset, size_t length);
-
-  bool commit_inner(size_t offset, size_t length);
-
-public:
-  ZBackingFile();
-
-  bool is_initialized() const;
-
-  int fd() const;
-  size_t size() const;
-  size_t available() const;
-
-  size_t commit(size_t offset, size_t length);
-  size_t uncommit(size_t offset, size_t length);
-};
-
-#endif // OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP