netdev - Re: [PATCH net] udp: Remove an unnecessary variable in udp[46]_lib

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Date:   Fri, 24 Jul 2020 12:12:55 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     Kuniyuki Iwashima <kuniyu@...zon.co.jp>,
        David Miller <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jakub Sitnicki <jakub@...udflare.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Kuniyuki Iwashima <kuni1840@...il.com>,
        Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH net] udp: Remove an unnecessary variable in udp[46]_lib_lookup2().

On Fri, Jul 24, 2020 at 6:38 AM Willem de Bruijn
<willemdebruijn.kernel@...il.com> wrote:
>
> On Fri, Jul 24, 2020 at 2:13 AM Kuniyuki Iwashima <kuniyu@...zon.co.jp> wrote:
> >
> > From:   David Miller <davem@...emloft.net>
> > Date:   Thu, 23 Jul 2020 15:10:51 -0700 (PDT)
> > > From: Kuniyuki Iwashima <kuniyu@...zon.co.jp>
> > > Date: Thu, 23 Jul 2020 01:52:27 +0900
> > >
> > > > This patch removes an unnecessary variable in udp[46]_lib_lookup2() and
> > > > makes it easier to resolve a merge conflict with bpf-next reported in
> > > > the link below.
> > > >
> > > > Link: https://lore.kernel.org/linux-next/20200722132143.700a5ccc@canb.auug.org.au/
> > > > Fixes: efc6b6f6c311 ("udp: Improve load balancing for SO_REUSEPORT.")
> > > > Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.co.jp>
> > > > Signed-off-by: Jakub Sitnicki <jakub@...udflare.com>
> > > > Cc: Willem de Bruijn <willemdebruijn.kernel@...il.com>
> > >
> > > This doesn't apply to net-next.
> >
> > Yes. I think this kind of patch should be submitted to net-next, but this
> > is for the net tree. Please let me add more description.
> >
> > Currently, the net and net-next trees conflict in udp[46]_lib_lookup2()
> > between
> >
> >    efc6b6f6c311 ("udp: Improve load balancing for SO_REUSEPORT.")
> >
> > and
> >
> >    7629c73a1466 ("udp: Extract helper for selecting socket from reuseport group")
> >    2a08748cd384 ("udp6: Extract helper for selecting socket from reuseport group")
> > .
> >
> > The conflict is reported in the link[0] and Jakub suggested how to resolve
> > it[1]. To ease the merge conflict, Jakub and I have to send follow up patches to
> > the bpf-next and net trees.
> >
> > Now, his patchset (7629c73a1466 and 2a08748cd384) to bpf-next is merged
> > into net-next, and his follow up patch is applied in bpf-next[2].
> >
> > I fixed a bug in efc6b6f6c311, but it introduced an unnecessary variable
> > and made the conflict worse. So I sent this follow up patch to net tree.
> >
> > However, I do not know the best way to resolve the conflict, so any comments
> > are welcome.
>
> Perhaps simpler is to apply this change to bpf-next:

I'm fine whichever way.
Could you please submit an official patch?