diff -urN oldtree/include/linux/devfs_fs_kernel.h newtree/include/linux/devfs_fs_kernel.h
--- oldtree/include/linux/devfs_fs_kernel.h	2006-06-21 13:12:02.710099250 +0000
+++ newtree/include/linux/devfs_fs_kernel.h	2006-06-21 15:42:16.547250750 +0000
@@ -2,6 +2,7 @@
 #define _LINUX_DEVFS_FS_KERNEL_H
 
 #include <linux/fs.h>
+#include <linux/config.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>