diff -u -r org/xenomai-2.3.2/include/rtdm/rtdm_driver.h xenomai-2.3.2/include/rtdm/rtdm_driver.h
--- org/xenomai-2.3.2/include/rtdm/rtdm_driver.h	2007-02-19 15:09:49.000000000 +0100
+++ xenomai-2.3.2/include/rtdm/rtdm_driver.h	2007-10-11 09:15:36.000000000 +0200
@@ -428,6 +428,9 @@
     /** Driver definable device ID */
     int                             device_id;
 
+    /** Driver definable device data */
+    void                            *device_data;
+
     /** Data stored by RTDM inside a registered device (internal use only) */
     struct rtdm_dev_reserved        reserved;
 };