[openwrt/openwrt] wireguard: Fix compile with kernel 4.14.217

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-19.07:
https://git.openwrt.org/1ce50085975781c4c265dfae4c8a98e2d902dc3f

commit 1ce50085975781c4c265dfae4c8a98e2d902dc3f
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Fri Jan 29 21:12:43 2021 +0100

    wireguard: Fix compile with kernel 4.14.217
    
    Backport a patch from wireguard to fix a compile problem with kernel
    4.14.217.
    
    Fixes: 2ecb22dc51a5 ("kernel: bump 4.14 to 4.14.217")
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 package/network/services/wireguard/Makefile         |  2 +-
 .../001-kernel-compile-skb_mark_not_on_list.patch   | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/package/network/services/wireguard/Makefile b/package/network/services/wireguard/Makefile
index 710038732b..fc546e3e8c 100644
--- a/package/network/services/wireguard/Makefile
+++ b/package/network/services/wireguard/Makefile
@@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/kernel.mk
 PKG_NAME:=wireguard
 
 PKG_VERSION:=1.0.20200611
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=wireguard-linux-compat-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://git.zx2c4.com/wireguard-linux-compat/snapshot/
diff --git a/package/network/services/wireguard/patches/001-kernel-compile-skb_mark_not_on_list.patch b/package/network/services/wireguard/patches/001-kernel-compile-skb_mark_not_on_list.patch
new file mode 100644
index 0000000000..ad051b7c03
--- /dev/null
+++ b/package/network/services/wireguard/patches/001-kernel-compile-skb_mark_not_on_list.patch
@@ -0,0 +1,21 @@
+From 1bb90881971c226d45c0abd1ac16ce3d6b77fc5f Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason at zx2c4.com>
+Date: Sun, 24 Jan 2021 14:09:09 +0100
+Subject: compat: skb_mark_not_on_list was backported to 4.14
+
+Signed-off-by: Jason A. Donenfeld <Jason at zx2c4.com>
+---
+ src/compat/compat.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/src/compat/compat.h
++++ b/src/compat/compat.h
+@@ -826,7 +826,7 @@ static __always_inline void old_rcu_barr
+ #define COMPAT_CANNOT_DEPRECIATE_BH_RCU
+ #endif
+ 
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 10) && !defined(ISRHEL8) && !defined(ISOPENSUSE15)
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 10) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0) && !defined(ISRHEL8)) || LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 217)
+ static inline void skb_mark_not_on_list(struct sk_buff *skb)
+ {
+ 	skb->next = NULL;