netdev - Re: [PATCH] [net-next] ip_tunnel: fix building with NET_IP

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Date:   Wed, 11 Oct 2017 15:57:28 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Arnd Bergmann <arnd@...db.de>, Networking <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Amine Kherbouche <amine.kherbouche@...nd.com>
Subject: Re: [PATCH] [net-next] ip_tunnel: fix building with NET_IP_TUNNEL=m

I forgot to Cc Amine, sorry.

On Wed, Oct 11, 2017 at 3:55 PM, Arnd Bergmann <arnd@...db.de> wrote:
> When af_mpls is built-in but the tunnel support is a module,
> we get a link failure:
>
> net/mpls/af_mpls.o: In function `mpls_init':
> af_mpls.c:(.init.text+0xdc): undefined reference to `ip_tunnel_encap_add_ops'
>
> This adds a Kconfig statement to prevent the broken
> configuration and force mpls to be a module as well in
> this case.
>
> Fixes: bdc476413dcd ("ip_tunnel: add mpls over gre support")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  net/mpls/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/net/mpls/Kconfig b/net/mpls/Kconfig
> index 5c467ef97311..801ea9098387 100644
> --- a/net/mpls/Kconfig
> +++ b/net/mpls/Kconfig
> @@ -24,6 +24,7 @@ config NET_MPLS_GSO
>
>  config MPLS_ROUTING
>         tristate "MPLS: routing support"
> +       depends on NET_IP_TUNNEL || NET_IP_TUNNEL=n
>         ---help---
>          Add support for forwarding of mpls packets.
>
> --
> 2.9.0
>