linux-kernel - Re: [PATCH 1/2] ipv6: hide ip6_encap_hlen/ip6_tnl

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Date:	Sun, 29 May 2016 22:24:34 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	arnd@...db.de
Cc:	tom@...bertland.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ipv6: hide ip6_encap_hlen/ip6_tnl_encap definitions

From: Arnd Bergmann <arnd@...db.de>
Date: Wed, 25 May 2016 16:50:45 +0200

> A recent cleanup moved MAX_IPTUN_ENCAP_OPS along with some other
> definitions, but it is now invisible when CONFIG_INET is
> not defined, but still referenced from ip6_tunnel.h:
> 
> In file included from net/xfrm/xfrm_input.c:17:0:
> include/net/ip6_tunnel.h:67:17: error: 'MAX_IPTUN_ENCAP_OPS' undeclared here (not in a function)
>    ip6tun_encaps[MAX_IPTUN_ENCAP_OPS];
>                  ^~~~~~~~~~~~~~~~~~~
> 
> This hides the ip6_encap_hlen and ip6_tnl_encap functions inside
> of CONFIG_INET so we don't run into the the problem.
> 
> Alternatively we could move the macro out of the #ifdef again to
> restore the previous behavior
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 55c2bc143224 ("net: Cleanup encap items in ip_tunnels.h")

Applied.