--- a/master/master.h	Thu Sep 28 08:29:59 2006 +0000
+++ b/master/master.h	Thu Sep 28 12:58:06 2006 +0000
@@ -45,6 +45,7 @@
 #include <linux/sysfs.h>
 #include <linux/timer.h>
 #include <asm/atomic.h>
+#include <asm/semaphore.h>
 
 #include "device.h"
 #include "domain.h"
@@ -99,6 +100,7 @@
     struct kobject kobj; /**< kobject */
 
     ec_device_t *device; /**< EtherCAT device */
+    struct semaphore device_sem; /**< device semaphore */
 
     ec_xmldev_t xmldev; /**< XML character device */