kernel: add linux 5.10 support

Signed-off-by: Felix Fietkau <nbd@nbd.name>

3 files changed, 157 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch b/target/linux/generic/backport-5.10/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch
new file mode 100644
index 0000000000..7ac4f9d240
--- /dev/null
+++ b/target/linux/generic/backport-5.10/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch
@@ -0,0 +1,30 @@
+From 13b1ecc3401653a355798eb1dee10cc1608202f4 Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@nbd.name>
+Date: Mon, 18 Jan 2016 12:27:49 +0100
+Subject: [PATCH 33/34] Kbuild: don't hardcode path to awk in
+ scripts/ld-version.sh
+
+On some systems /usr/bin/awk does not exist, or is broken. Find it via
+$PATH instead.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ scripts/ld-version.sh | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/scripts/ld-version.sh
++++ b/scripts/ld-version.sh
+@@ -1,6 +1,7 @@
+-#!/usr/bin/awk -f
++#!/bin/sh
+ # SPDX-License-Identifier: GPL-2.0
+ # extract linker version number from stdin and turn into single number
++exec awk '
+ 	{
+ 	gsub(".*\\)", "");
+ 	gsub(".*version ", "");
+@@ -9,3 +10,4 @@
+ 	print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
+ 	exit
+ 	}
++'
diff --git a/target/linux/generic/backport-5.10/011-kbuild-export-SUBARCH.patch b/target/linux/generic/backport-5.10/011-kbuild-export-SUBARCH.patch
new file mode 100644
index 0000000000..a1f0d9aa96
--- /dev/null
+++ b/target/linux/generic/backport-5.10/011-kbuild-export-SUBARCH.patch
@@ -0,0 +1,21 @@
+From 173019b66dcc9d68ad9333aa744dad1e369b5aa8 Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sun, 9 Jul 2017 00:26:53 +0200
+Subject: [PATCH 34/34] kernel: add compile fix for linux 4.9 on x86
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ Makefile | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/Makefile
++++ b/Makefile
+@@ -506,7 +506,7 @@ KBUILD_LDFLAGS_MODULE :=
+ KBUILD_LDFLAGS :=
+ CLANG_FLAGS :=
+ 
+-export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
++export ARCH SRCARCH SUBARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
+ export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
+ export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
+ export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
diff --git a/target/linux/generic/backport-5.10/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch b/target/linux/generic/backport-5.10/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch
new file mode 100644
index 0000000000..137264cb9f
--- /dev/null
+++ b/target/linux/generic/backport-5.10/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch
@@ -0,0 +1,106 @@
+From: Pablo Neira Ayuso <pablo@netfilter.org>
+Date: Thu, 25 Jan 2018 12:58:55 +0100
+Subject: [PATCH] netfilter: nft_flow_offload: handle netdevice events from
+ nf_flow_table
+
+Move the code that deals with device events to the core.
+
+Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
+---
+
+--- a/net/netfilter/nf_flow_table_core.c
++++ b/net/netfilter/nf_flow_table_core.c
+@@ -577,13 +577,41 @@ void nf_flow_table_free(struct nf_flowta
+ }
+ EXPORT_SYMBOL_GPL(nf_flow_table_free);
+ 
++static int nf_flow_table_netdev_event(struct notifier_block *this,
++				      unsigned long event, void *ptr)
++{
++	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
++
++	if (event != NETDEV_DOWN)
++		return NOTIFY_DONE;
++
++	nf_flow_table_cleanup(dev);
++
++	return NOTIFY_DONE;
++}
++
++static struct notifier_block flow_offload_netdev_notifier = {
++	.notifier_call	= nf_flow_table_netdev_event,
++};
++
+ static int __init nf_flow_table_module_init(void)
+ {
+-	return nf_flow_table_offload_init();
++	int ret;
++
++	ret = nf_flow_table_offload_init();
++	if (ret)
++		return ret;
++
++	ret = register_netdevice_notifier(&flow_offload_netdev_notifier);
++	if (ret)
++		nf_flow_table_offload_exit();
++
++	return ret;
+ }
+ 
+ static void __exit nf_flow_table_module_exit(void)
+ {
++	unregister_netdevice_notifier(&flow_offload_netdev_notifier);
+ 	nf_flow_table_offload_exit();
+ }
+ 
+--- a/net/netfilter/nft_flow_offload.c
++++ b/net/netfilter/nft_flow_offload.c
+@@ -237,47 +237,14 @@ static struct nft_expr_type nft_flow_off
+ 	.owner		= THIS_MODULE,
+ };
+ 
+-static int flow_offload_netdev_event(struct notifier_block *this,
+-				     unsigned long event, void *ptr)
+-{
+-	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+-
+-	if (event != NETDEV_DOWN)
+-		return NOTIFY_DONE;
+-
+-	nf_flow_table_cleanup(dev);
+-
+-	return NOTIFY_DONE;
+-}
+-
+-static struct notifier_block flow_offload_netdev_notifier = {
+-	.notifier_call	= flow_offload_netdev_event,
+-};
+-
+ static int __init nft_flow_offload_module_init(void)
+ {
+-	int err;
+-
+-	err = register_netdevice_notifier(&flow_offload_netdev_notifier);
+-	if (err)
+-		goto err;
+-
+-	err = nft_register_expr(&nft_flow_offload_type);
+-	if (err < 0)
+-		goto register_expr;
+-
+-	return 0;
+-
+-register_expr:
+-	unregister_netdevice_notifier(&flow_offload_netdev_notifier);
+-err:
+-	return err;
++	return nft_register_expr(&nft_flow_offload_type);
+ }
+ 
+ static void __exit nft_flow_offload_module_exit(void)
+ {
+ 	nft_unregister_expr(&nft_flow_offload_type);
+-	unregister_netdevice_notifier(&flow_offload_netdev_notifier);
+ }
+ 
+ module_init(nft_flow_offload_module_init);