linux-kernel - Re: [PATCH v2 2/4] x86/vdso: Remove a stale/misleading comment from the linker script

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Message-ID: <CALCETrWmEOpgkNsKzXxHyS8+U1dVYTMMe5BUVY=fnckdfk-oJQ@mail.gmail.com>
Date:   Tue, 4 Dec 2018 14:49:22 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     "Christopherson, Sean J" <sean.j.christopherson@...el.com>
Cc:     Andrew Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] x86/vdso: Remove a stale/misleading comment from
 the linker script

On Tue, Dec 4, 2018 at 1:26 PM Sean Christopherson
<sean.j.christopherson@...el.com> wrote:
>
> Once upon a time, vdso2c aggressively stripped data from the vDSO
> image when generating the final userspace image.  This included
> stripping the .altinstructions and .altinstr_replacement sections.
> Eventually, the stripping process reverted to "objdump -S" and no
> longer removed the aforementioned sections, but the comment remained.
>
> Keeping the .alt* sections at the end of the PT_LOAD segment is no
> longer necessary, but there's no harm in doing so and it's a helpful
> reminder that they don't need to be included in the final vDSO image,
> i.e. someone may want to take another stab at zapping/stripping the
> unneeded sections.

Acked-by: Andy Lutomirski <luto@...nel.org>