Subject: Re: [PATCH net 1/4] ipv6: silence compilation warning for non-IPV6 builds

From: Leon Romanovsky <[email-masked]>
Date: Tue, 2 Feb 2021 20:55:28 +0200

On Tue, Feb 02, 2021 at 08:29:09AM -0800, Jakub Kicinski wrote:
> On Tue,  2 Feb 2021 15:55:41 +0200 Leon Romanovsky wrote:
> > From: Leon Romanovsky <[email-masked]>
> >
> > The W=1 compilation of allmodconfig generates the following warning:
> >
> > net/ipv6/icmp.c:448:6: warning: no previous prototype for 'icmp6_send' [-Wmissing-prototypes]
> >   448 | void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
> >       |      ^~~~~~~~~~
> >
> > In such configuration, the icmp6_send() is not used outside of icmp.c, so close
> > its EXPORT_SYMBOL and add "static" word to limit the scope.
> >
> > Fixes: cc7a21b6fbd9 ("ipv6: icmp6: avoid indirect call for icmpv6_send()")
> > Signed-off-by: Leon Romanovsky <[email-masked]>
>
> That's a little much ifdefinery, why not move the declaration from
> under the ifdef in the header instead?

We will find ourselves with exported but not used function, it will
increase symbol file, not big deal but not nice, either.

>
> If you repost please target net-next, admittedly these fixes are pretty
> "obviously correct" but they are not urgent either.

I'll do.

Thanks