--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#ifndef __CEPH_OS_REVERSE_H
+#define __CEPH_OS_REVERSE_H
+
+#include "include/int_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint32_t reverse_bits(uint32_t v);
+extern uint32_t reverse_nibbles(uint32_t retval);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif