Index: include/io.h
===================================================================
--- include/io.h	(revision 8973acd23a70305139d469bac63060280979efcb)
+++ include/io.h	(revision 99cac8608770916f6368b2cb7e41876121107061)
@@ -34,4 +34,5 @@
 	int16_t	d_seek;		/* seek routine code */
 	devop	d_open;		/* special open function */
+	int16_t	d_kind;		/* kind of device */
 };
 
@@ -40,5 +41,3 @@
 	int8_t	*d_name;	/* device name */
 	struct	device	*d_dev;	/* pointer to device structure */
-	io_arg	d_arg;		/* argument to device driver */
-	int16_t	d_kind;		/* kind of device */
 };