[PATCH 1/1] Revert "compat: skb_mark_not_on_list will be backported to Ubuntu 18.04"

[Thadeu Lima de Souza Cascardo]

This reverts commit cad80597c7947f0def83caf8cb56aff0149c83a8.

Because this commit has not been backported so far, due to the implications
of building Ubuntu's backport of wireguard in a timely manner.

For now, reverting this fix would allow wireguard-linux-compat CI to work
on Ubuntu 18.04.

A different fix or the same one can be applied again when the time is
right.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
---
 src/compat/compat.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compat/compat.h b/src/compat/compat.h
index 26a6d7ec2d6b..91d4388824ea 100644
--- a/src/compat/compat.h
+++ b/src/compat/compat.h
@@ -823,7 +823,7 @@ static __always_inline void old_rcu_barrier(void)
 #define COMPAT_CANNOT_DEPRECIATE_BH_RCU
 #endif
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 10) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0) && !defined(ISRHEL8) && !defined(ISUBUNTU1804)) || LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 217)
+#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;
-- 
2.27.0