--- old/src/os/linux/vm/hpi_linux.hpp	2010-11-16 18:04:56.000000000 +0100
+++ new/src/os/linux/vm/hpi_linux.hpp	2010-11-16 18:04:56.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2010, 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
@@ -22,6 +22,9 @@
  *
  */
 
+#ifndef OS_LINUX_VM_HPI_LINUX_HPP
+#define OS_LINUX_VM_HPI_LINUX_HPP
+
 //
 // Because the interruptible IO has been dropped for HotSpot/Linux,
 // the following HPI interface is very different from HotSparc.
@@ -222,3 +225,5 @@
 // Reconciliation History
 // hpi_solaris.hpp      1.9 99/08/30 16:31:23
 // End
+
+#endif // OS_LINUX_VM_HPI_LINUX_HPP