From 2c66588f3e0b6f48ec1d19bd4d6eb4804ed940e7 Mon Sep 17 00:00:00 2001
From: Michael Brown <mcb30@etherboot.org>
Date: Fri, 12 Jan 2007 01:40:12 +0000
Subject: [PATCH] Add UNULL

---
 src/include/gpxe/uaccess.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/include/gpxe/uaccess.h b/src/include/gpxe/uaccess.h
index 38853bfb..05f89e03 100644
--- a/src/include/gpxe/uaccess.h
+++ b/src/include/gpxe/uaccess.h
@@ -21,4 +21,7 @@
 
 #include <bits/uaccess.h>
 
+/** Equivalent of NULL for user pointers */
+#define UNULL ( ( userptr_t ) 0 )
+
 #endif /* _GPXE_UACCESS_H */