The patch noted replaces a line of code in drivers/staging/comedi/drivers/usbdux.c that will fail to compile due to syntax.
The patch attempts:
-	init_MUTEX(&(usbduxsub[index].sem));
+	sema_init(&(usbduxsub[index].sem)), 1;

and the line should read:
-	init_MUTEX(&(usbduxsub[index].sem));
+	sema_init(&(usbduxsub[index].sem), 1);