linux-kernel - Re: linux-next: build warnings after merge of the tip tree

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Date:   Mon, 21 Mar 2022 15:12:05 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Alexei Starovoitov <ast@...nel.org>,
        "H.J. Lu" <hjl.tools@...il.com>,
        "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        Mike Rapoport <rppt@...nel.org>,
        linux-toolchains <linux-toolchains@...r.kernel.org>,
        Andrew Cooper <Andrew.Cooper3@...rix.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: linux-next: build warnings after merge of the tip tree

On Mon, Mar 21, 2022 at 3:05 PM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> On Mon, 21 Mar 2022 09:52:58 -0700 Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> >
> > On Mon, Mar 21, 2022 at 9:45 AM Peter Zijlstra <peterz@...radead.org> wrote:
> > > >
> > > > It's presumably not in any of the pull requests I already have
> > > > pending, but it would be nice if I saw some details of _what_ you are
> > > > complaining about, and not just the complaint itself ;)
> > >
> > > Duh, right. It's this series:
> > >
> > >   https://lore.kernel.org/bpf/164757541675.26179.17727138330733641017.git-patchwork-notify@kernel.org/
> > >
> > > That went into bpf-next last Friday. I just checked but haven't found a
> > > pull for it yet.
> >
> > Thanks. I can confirm it's not in any of the pull requests I have
> > pending, so I'll just start doing my normal work and try to remember
> > to look out for this issue later.
>
> The normal path for bpf-next code is via the net-next tree.  But the
> above series has not yet been merged into the net-next tree so is only
> in the bpf-next tree.
>
> So, what am I to do?  Drop the bpf-next tree from linux-next until this
> is resolved?  Some input from the BPF people would be useful.
>
> Dave, Jakub, please do not merge the bpf-bext tree into the net-next
> tree for now.

That makes little sense. It's not an unusual merge conflict.
Peter's endbr series conflict with Masami's fprobe.
Peter has a trivial patch that fixes objtool warning.
The question is how to land that patch.
I think the best is for Linus to apply it after bpf-next->net-next gets
merged.

We're preparing bpf-next PR right now.