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

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Message-ID: <CAADnVQKg7GPVpg-22B2Ym5HFVoGaquoFZDEkRwTDgXzm+L8OOw@mail.gmail.com>
Date:   Mon, 21 Mar 2022 15:50:17 -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 3:46 PM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi Alexei,
>
> On Mon, 21 Mar 2022 15:12:05 -0700 Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:
> >
> > 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.
>
> Peter has other concerns, please read the thread and consider them.

Masami is an expert in kprobe. He copy pasted a bit of kprobe logic
to make it into 'multi kprobe' (he calls it fprobe).
I believe he knows what he's doing.
Steven reviewed and tested that set.
We've tested it as well and don't have any correctness or api concerns.