--- a/master/master.h	Tue Apr 25 11:39:33 2006 +0000
+++ b/master/master.h	Tue Apr 25 12:04:04 2006 +0000
@@ -98,6 +98,9 @@
     unsigned int reserved; /**< true, if the master is reserved for RT */
     struct timer_list freerun_timer; /**< timer object for free run mode */
     ec_master_mode_t mode; /**< master mode */
+    int (*request_cb)(void *); /**< lock request callback */
+    void (*release_cb)(void *); /**< lock release callback */
+    void *cb_data; /**< data parameter of locking callbacks */
 };
 
 /*****************************************************************************/