linux-kernel - Re: objtool clac/stac handling change..

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Message-ID: <CAHk-=wjXftMyC93Jg8J=_HiuERsHujPOa-RbOmMLuuxVoJCrfQ@mail.gmail.com>
Date:   Wed, 1 Jul 2020 19:30:35 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: objtool clac/stac handling change..

On Wed, Jul 1, 2020 at 5:48 PM Andy Lutomirski <luto@...nel.org> wrote:
>
> You inspired me to mock it up.

Ahh, you want to just use the jump folding of gcc to avoid the problem.

I guess we could do that. Are there cases where this actually helps?

                 Linus