From: Sven Eckelmann <sven@narfation.org>
Date: Tue, 11 Jul 2023 11:46:30 +0200
Subject: batman-adv: compat: Use native kstrtox.h for 5.10.185

Upstream stable commit 6e2e551e39fd ("kernel.h: split out kstrtox() and
simple_strtox() to a separate header") backported the support for
linux/kstrtox.h. Unfortunately, the compat support via linux/kernel.h was
dropped and thus references to kstrtou64 caused build errors

  batman-adv/net/batman-adv/gateway_common.c: In function ‘batadv_parse_throughput’:
  batman-adv/net/batman-adv/gateway_common.c:55:15: error: implicit declaration of function ‘kstrtou64’ [-Werror=implicit-function-declaration]
     55 |         ret = kstrtou64(buff, 10, &lthroughput);
        |               ^~~~~~~~~

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/8924adbdf993cd0521f9d0024b43e3b23af5114f

--- a/compat-include/linux/kstrtox.h
+++ b/compat-include/linux/kstrtox.h
@@ -11,7 +11,8 @@
 #define _NET_BATMAN_ADV_COMPAT_LINUX_KSTRTOX_H_
 
 #include <linux/version.h>
-#if LINUX_VERSION_IS_GEQ(5, 14, 0)
+#if (LINUX_VERSION_IS_GEQ(5, 10, 185) && LINUX_VERSION_IS_LESS(5, 11, 0)) || \
+    LINUX_VERSION_IS_GEQ(5, 14, 0)
 #include_next <linux/kstrtox.h>
 #else
 #include <linux/kernel.h>