linux-kernel - Re: [PATCH v3 4/4] x86/retpoline: Support retpoline build with Clang

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Message-ID: <1519116351.7876.104.camel@infradead.org>
Date:   Tue, 20 Feb 2018 08:45:51 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Chandler Carruth <chandlerc@...gle.com>
Cc:     karahmed@...zon.de, x86@...nel.org, kvm@...r.kernel.org,
        torvalds@...ux-foundation.org, pbonzini@...hat.com,
        linux-kernel@...r.kernel.org, bp@...en8.de, peterz@...radead.org,
        jmattson@...gle.com, rkrcmar@...hat.com,
        arjan.van.de.ven@...el.com, dave.hansen@...el.com, mingo@...nel.org
Subject: Re: [PATCH v3 4/4] x86/retpoline: Support retpoline build with
 Clang

On Tue, 2018-02-20 at 09:36 +0100, Thomas Gleixner wrote:
> On Mon, 19 Feb 2018, David Woodhouse wrote:
> 
> Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
> 
> > 
> > +/* Clang doesn't have a way to turn it off per-function, yet. */
>
> Is that going to happen in the foreseable future? Hmm, why am I asking,
> clang is going to break anyway once we require asm-gotos hard.

It's only minor optimisation so I told them there was no massive
urgency to get it implemented. Unlike asm-goto.

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