--- 1/include/linux/sysctl.h	2003-05-18 22:12:39.000000000 +0200
+++ 2/include/linux/sysctl.h	2003-05-18 22:13:58.000000000 +0200
@@ -35,6 +35,10 @@
 				   the largest acceptable value for the nlen
 				   member of a struct __sysctl_args to have? */
 
+#ifndef __user
+#define __user
+#endif
+
 struct __sysctl_args {
 	int __user *name;
 	int nlen;