linux-kernel - Re: [PATCH] ipv6: mcast: make annotations for ip6_mc

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Date:   Fri, 30 Oct 2020 13:59:48 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc:     Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Al Viro <viro@...iv.linux.org.uk>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-safety@...ts.elisa.tech
Subject: Re: [PATCH] ipv6: mcast: make annotations for ip6_mc_msfget()
 consistent

On Wed, 28 Oct 2020 12:53:49 +0100 Lukas Bulwahn wrote:
> Commit 931ca7ab7fe8 ("ip*_mc_gsfget(): lift copyout of struct group_filter
> into callers") adjusted the type annotations for ip6_mc_msfget() at its
> declaration, but missed the type annotations at its definition.
> 
> Hence, sparse complains on ./net/ipv6/mcast.c:
> 
>   mcast.c:550:5: error: symbol 'ip6_mc_msfget' redeclared with different type \
>   (incompatible argument 3 (different address spaces))
> 
> Make ip6_mc_msfget() annotations consistent, which also resolves this
> warning from sparse:
> 
>   mcast.c:607:34: warning: incorrect type in argument 1 (different address spaces)
>   mcast.c:607:34:    expected void [noderef] __user *to
>   mcast.c:607:34:    got struct __kernel_sockaddr_storage *p
> 
> No functional change. No change in object code.
> 
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>

Applied, thank you!