+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
+
+#define batadv_softif_slave_add(__dev, __slave_dev, __extack) \
+ batadv_softif_slave_add(__dev, __slave_dev)
+
+#endif /* < KERNEL_VERSION(4, 15, 0) */
+
+#ifndef from_timer
+
+#define TIMER_DATA_TYPE unsigned long
+#define TIMER_FUNC_TYPE void (*)(TIMER_DATA_TYPE)
+
+static inline void (struct timer_list *timer,
+ void (*callback)(struct timer_list *),
+ unsigned int flags)
+{
+ __setup_timer(timer, (TIMER_FUNC_TYPE)callback,
+ (TIMER_DATA_TYPE)timer, flags);
+}
+
+#define from_timer(var, callback_timer, timer_fieldname) \
+ container_of(callback_timer, typeof(*var), timer_fieldname)
+
+#endif /* !from_timer */
+