linux-kernel - Re: [PATCH v2 5/7] x86/mm, tracing: Fix CR2 corruption

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Message-ID: <CAHk-=wh+J7ts6OrzzscMj5FONd3TRAwAKPZ=BQmEb2E8_-RXTA@mail.gmail.com>
Date:   Sun, 7 Jul 2019 11:17:09 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Juergen Gross <jgross@...e.com>,
        LKML <linux-kernel@...r.kernel.org>,
        He Zhe <zhe.he@...driver.com>,
        Joel Fernandes <joel@...lfernandes.org>, devel@...ukata.com
Subject: Re: [PATCH v2 5/7] x86/mm, tracing: Fix CR2 corruption

On Sun, Jul 7, 2019 at 8:11 AM Andy Lutomirski <luto@...nel.org> wrote:
>
> FWIW, I'm leaning toward suggesting that we apply the trivial tracing
> fix and backport *that*.  Then, in -tip, we could revert it and apply
> this patch instead.

You don't have to have the same fix in stable as in -tip.

It's fine to send something to stable that says "Fixed differently by
commit XYZ upstream". The main thing is to make sure that stable
doesn't have fixes that then get lost upstream (which we used to have
long long ago).

                  Linus