From: Stefano Brivio <sbrivio@xxxxxxxxxx>
Date: Wed, 5 Aug 2020 15:39:31 +0200
> On architectures defining _HAVE_ARCH_IPV6_CSUM, we get
> csum_ipv6_magic() defined by means of arch checksum.h headers. On
> other architectures, we actually need to include net/ip6_checksum.h
> to be able to use it.
>
> Without this include, building with defconfig breaks at least for
> s390.
>
> Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> Fixes: 4cb47a8644cc ("tunnels: PMTU discovery support for directly bridged IP packets")
> Signed-off-by: Stefano Brivio <sbrivio@xxxxxxxxxx>
Applied, thank you.
