linux-kernel - Re: [PATCH v2] x86/speculation: Use DECLARE_PER_CPU for x86_spec_ctrl

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Message-ID: <YtCUleBPU31sY0jK@worktop.programming.kicks-ass.net>
Date:   Fri, 15 Jul 2022 00:11:33 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Borislav Petkov <bp@...e.de>,
        the arch/x86 maintainers <x86@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <llvm@...ts.linux.dev>,
        stable <stable@...r.kernel.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2] x86/speculation: Use DECLARE_PER_CPU for
 x86_spec_ctrl_current

On Thu, Jul 14, 2022 at 02:56:12PM -0700, Linus Torvalds wrote:
> On Thu, Jul 14, 2022 at 2:51 PM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > But if this particular one causes problems for maintainers, I can
> > easily just take it right away just cherry-pick it from my own
> > test-tree to my "main" tree.
> 
> Oh, and as I did that cherry-pick, I suddenly remembered that I think
> PeterZ had a slightly different version of it - the one I picked up is
> Nathan's "v2".
> 
> PeterZ, do you have preferences? I've waited this long, I might as
> well wait a bit more before I push out whatever version people prefer.

Nathan's is much nicer; I got bit by header hell and punted.