--- /dev/null
+From: Sven Eckelmann <sven@narfation.org>
+Date: Tue, 14 Sep 2021 21:02:10 +0200
+Subject: Revert "batman-adv: Switch to kstrtox.h for kstrtou64"
+
+This header is only available after Linux 5.14
+
+This reverts commit c9a69cb4048ebef3a4d91835669011a26d9b7dab.
+
+--- a/net/batman-adv/gateway_common.c
++++ b/net/batman-adv/gateway_common.c
+@@ -10,7 +10,7 @@
+ #include <linux/atomic.h>
+ #include <linux/byteorder/generic.h>
+ #include <linux/errno.h>
+-#include <linux/kstrtox.h>
++#include <linux/kernel.h>
+ #include <linux/limits.h>
+ #include <linux/math64.h>
+ #include <linux/netdevice.h>