netdev - Re: [PATCH bpf-next] selftests/bpf: bring back (void *) cast to set_ipv4_csum in test_tc

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Date:   Tue, 16 Apr 2019 10:27:07 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Stanislav Fomichev <sdf@...gle.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     davem@...emloft.net, ast@...nel.org,
        Alan Maguire <alan.maguire@...cle.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>
Subject: Re: [PATCH bpf-next] selftests/bpf: bring back (void *) cast to
 set_ipv4_csum in test_tc_tunnel

On 04/12/2019 12:53 AM, Stanislav Fomichev wrote:
> It was removed in commit 166b5a7f2ca3 ("selftests_bpf: extend
> test_tc_tunnel for UDP encap") without any explanation.
> 
> Otherwise I see:
> progs/test_tc_tunnel.c:160:17: warning: taking address of packed member 'ip' of class or structure
>       'v4hdr' may result in an unaligned pointer value [-Waddress-of-packed-member]
>         set_ipv4_csum(&h_outer.ip);
>                        ^~~~~~~~~~
> 1 warning generated.
> 
> Cc: Alan Maguire <alan.maguire@...cle.com>
> Cc: Willem de Bruijn <willemdebruijn.kernel@...il.com>
> Fixes: 166b5a7f2ca3 ("selftests_bpf: extend test_tc_tunnel for UDP encap")
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>

Applied, thanks!