linux-kernel - Re: cpumask: re-introduce constant-sized cpumask optimizations

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Message-ID: <CAMuHMdUMbbQM5-1M=OkGzWZ2cKJsOu6t1tJotL9jUChRH-ErXA@mail.gmail.com>
Date:   Mon, 6 Mar 2023 21:18:58 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: cpumask: re-introduce constant-sized cpumask optimizations

Hi Linus,

On Mon, Mar 6, 2023 at 8:19 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> On Mon, Mar 6, 2023 at 3:20 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > Your final commit 596ff4a09b898179 ("cpumask: re-introduce
> > constant-sized cpumask optimizations") in v6.3-rc1 introduced a
> > regression.  During Debian userspace startup, the kernel crashes with:
>
> I'm pretty sure the attached patch should fix it. If you can confirm,
> that would be lovely.

Thanks, works fine again!
Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds