netdev - Re: pull-request: bpf-next 2022-03-21 v2

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Date:   Tue, 22 Mar 2022 09:38:07 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Network Development <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Kernel Team <kernel-team@...com>
Subject: Re: pull-request: bpf-next 2022-03-21 v2

On Tue, Mar 22, 2022 at 7:32 AM Masami Hiramatsu <mhiramat@...nel.org> wrote:
>
> Hi Alexei,
>
> So after this is merged, would you have a plan to merge the tip tree
> which has IBT to the bpf-next? Or should I wait for merging this series
> or IBT(ENDBR) series in Linus tree?
>
> If I add the no ENDBR annotation to the x86 rethook trampoline on this
> bpf-next branch, it will cause a build error...

Right now (after arch bits revert) there are no build errors in bpf-next
and won't be any after the merge into Linus's tree either.

linux-next is a proxy of what Linus's tree will look like in a few days.
Please create a single x86 arch patch against linux-next and make sure
Peter is happy with it.
We will land that patch at that time.

That patch will be pretty much the same as what you had earlier
with ENDBR annotation. And maybe regs->ss set which is future proofing
optional bit and not a functional part of the patch.