--- a/hotspot/src/os/linux/vm/osThread_linux.hpp	Tue Nov 23 15:01:43 2010 -0500
+++ b/hotspot/src/os/linux/vm/osThread_linux.hpp	Tue Nov 23 13:22:55 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2004, 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_OSTHREAD_LINUX_HPP
+#define OS_LINUX_VM_OSTHREAD_LINUX_HPP
+
  private:
   int _thread_type;
 
@@ -139,3 +142,5 @@
 // Reconciliation History
 // osThread_solaris.hpp 1.24 99/08/27 13:11:54
 // End
+
+#endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP