netdev - Re: [PATCH net 1/2] mpls: Make MPLS_IPTUNNEL select NET_MPLS

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Message-ID: <20201023112304.086cd5e0@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Fri, 23 Oct 2020 11:23:04 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Guillaume Nault <gnault@...hat.com>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
        Alexander Ovechkin <ovov@...dex-team.ru>,
        David Ahern <dsahern@...il.com>
Subject: Re: [PATCH net 1/2] mpls: Make MPLS_IPTUNNEL select NET_MPLS_GSO

On Fri, 23 Oct 2020 18:19:43 +0200 Guillaume Nault wrote:
> Since commit b7c24497baea ("mpls: load mpls_gso after mpls_iptunnel"),
> mpls_iptunnel.ko has a softdep on mpls_gso.ko. For this to work, we
> need to ensure that mpls_gso.ko is built whenever MPLS_IPTUNNEL is set.

Does it generate an error or a warning? I don't know much about soft
dependencies, but I'd think it's optional.

> diff --git a/net/mpls/Kconfig b/net/mpls/Kconfig
> index d672ab72ab12..b83093bcb48f 100644
> --- a/net/mpls/Kconfig
> +++ b/net/mpls/Kconfig
> @@ -33,6 +33,7 @@ config MPLS_ROUTING
>  config MPLS_IPTUNNEL
>  	tristate "MPLS: IP over MPLS tunnel support"
>  	depends on LWTUNNEL && MPLS_ROUTING
> +	select NET_MPLS_GSO
>  	help
>  	 mpls ip tunnel support.
>