linux-kernel - Re: [PATCH 2/2] x86/percpu: Fix this_cpu

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Message-ID: <CANn89i+xbyatCY3Qs=rH9Aaoa2-kbF0nE9u-Tg=NNgbg28OGjg@mail.gmail.com>
Date:   Thu, 11 Oct 2018 09:08:19 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 2/2] x86/percpu: Fix this_cpu_read()

On Thu, Oct 11, 2018 at 8:50 AM Peter Zijlstra <peterz@...radead.org> wrote:

> Right; it goes back a long long way... is:
>
>   7c3576d261ce ("[PATCH] i386: Convert PDA into the percpu section")
>
> early enough? That introduces percpu_from_op(), but arguably the
> pda_from_op() it replaces was buggy already.

Yeah I guess all stable versions would need a fix anyway, so this tag
would suffice,
even if bug was older.