Re: [PATCH] ipv4: tunnel: fix compilation on ARCH=um

[Eric Dumazet <eric.dumazet@gmail.com>]

On 8/12/20 12:08 PM, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@intel.com>
> 
> With certain configurations, a 64-bit ARCH=um errors
> out here with an unknown csum_ipv6_magic() function.
> Include the right header file to always have it.
> 
> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
> ---
>  net/ipv4/ip_tunnel_core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
> index 9ddee2a0c66d..4ecf0232ba2d 100644
> --- a/net/ipv4/ip_tunnel_core.c
> +++ b/net/ipv4/ip_tunnel_core.c
> @@ -37,6 +37,7 @@
>  #include <net/geneve.h>
>  #include <net/vxlan.h>
>  #include <net/erspan.h>
> +#include <net/ip6_checksum.h>
>  
>  const struct ip_tunnel_encap_ops __rcu *
>  		iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly;
> 

Already fixed ?

commit 8ed54f167abda44da48498876953f5b7843378df
Author: Stefano Brivio <sbrivio@redhat.com>
Date:   Wed Aug 5 15:39:31 2020 +0200

    ip_tunnel_core: Fix build for archs without _HAVE_ARCH_IPV6_CSUM
    
    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@canb.auug.org.au>
    Fixes: 4cb47a8644cc ("tunnels: PMTU discovery support for directly bridged IP packets")
    Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>