From 39cf9f5b470399d9f69daf0c9e91cb6970db659c Mon Sep 17 00:00:00 2001
From: Sven Eckelmann <sven@narfation.org>
Date: Thu, 28 Jan 2021 21:02:56 +0100
Subject: [PATCH] batman-adv: Drop compat code for Linux < 5.4

The lowest kernel version supported by OpenWrt at the moment is Linux 5.4.
It is therefore not required to have these dead code sections anymore.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
 batman-adv/Makefile           |   2 +-
 batman-adv/src/compat-hacks.h | 100 ----------------------------------
 2 files changed, 1 insertion(+), 101 deletions(-)

diff --git a/batman-adv/Makefile b/batman-adv/Makefile
index 2ed9596..002a2ef 100644
--- a/batman-adv/Makefile
+++ b/batman-adv/Makefile
@@ -4,7 +4,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=batman-adv
 PKG_VERSION:=2020.4
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://downloads.open-mesh.org/batman/releases/batman-adv-$(PKG_VERSION)
diff --git a/batman-adv/src/compat-hacks.h b/batman-adv/src/compat-hacks.h
index fec5e15..32730a3 100644
--- a/batman-adv/src/compat-hacks.h
+++ b/batman-adv/src/compat-hacks.h
@@ -5,106 +5,6 @@
 #include <linux/version.h>	/* LINUX_VERSION_CODE */
 #include <linux/types.h>
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
-
-#include <linux/netdevice.h>
-
-#define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
-	BUILD_BUG_ON(extack != NULL); \
-	netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info); \
-})
-
-#endif /* < KERNEL_VERSION(4, 15, 0) */
-
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
-
-#ifndef sizeof_field
-#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
-#endif
-
-#endif /* < KERNEL_VERSION(4, 16, 0) */
-
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0)
-
-#include_next <linux/igmp.h>
-#include_next <net/addrconf.h>
-
-static inline int batadv_ipv6_mc_check_mld1(struct sk_buff *skb)
-{
-	return ipv6_mc_check_mld(skb, NULL);
-}
-
-static inline int batadv_ipv6_mc_check_mld2(struct sk_buff *skb,
-					    struct sk_buff **skb_trimmed)
-{
-	return ipv6_mc_check_mld(skb, skb_trimmed);
-}
-
-#define ipv6_mc_check_mld_get(_1, _2, ipv6_mc_check_mld_name, ...) ipv6_mc_check_mld_name
-#define ipv6_mc_check_mld(...) \
-	ipv6_mc_check_mld_get(__VA_ARGS__, batadv_ipv6_mc_check_mld2, batadv_ipv6_mc_check_mld1)(__VA_ARGS__)
-
-static inline int batadv_ip_mc_check_igmp1(struct sk_buff *skb)
-{
-	return ip_mc_check_igmp(skb, NULL);
-}
-
-static inline int batadv_ip_mc_check_igmp2(struct sk_buff *skb,
-					   struct sk_buff **skb_trimmed)
-{
-	return ip_mc_check_igmp(skb, skb_trimmed);
-}
-
-#define ip_mc_check_igmp_get(_1, _2, ip_mc_check_igmp_name, ...) ip_mc_check_igmp_name
-#define ip_mc_check_igmp(...) \
-	ip_mc_check_igmp_get(__VA_ARGS__, batadv_ip_mc_check_igmp2, batadv_ip_mc_check_igmp1)(__VA_ARGS__)
-
-#endif /* < KERNEL_VERSION(5, 1, 0) */
-
-
-#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) */
-
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
-
-static inline int batadv_access_ok(int type, const void __user *p,
-				   unsigned long size)
-{
-	return access_ok(type, p, size);
-}
-
-#ifdef access_ok
-#undef access_ok
-#endif
-
-#define access_ok_get(_1, _2, _3 , access_ok_name, ...) access_ok_name
-#define access_ok(...) \
-	access_ok_get(__VA_ARGS__, access_ok3, access_ok2)(__VA_ARGS__)
-
-#define access_ok2(addr, size)	batadv_access_ok(VERIFY_WRITE, (addr), (size))
-#define access_ok3(type, addr, size)	batadv_access_ok((type), (addr), (size))
-
-#endif /* < KERNEL_VERSION(5, 0, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 0)
-
-#ifndef fallthrough
-#if __GNUC__ > 7 && !defined(__CHECKER__)
-# define fallthrough                    __attribute__((__fallthrough__))
-#else
-# define fallthrough                    do {} while (0)  /* fallthrough */
-#endif
-#endif
-
-#endif /* < KERNEL_VERSION(5, 4, 0) */
-
 #if LINUX_VERSION_IS_LESS(5, 10, 0)
 
 #include <linux/if_bridge.h>