linux-kernel - Re: [PATCH] x86/alternatives: Fix optimize

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Message-ID: <20180110211058.bp4ymu4quwqgw2mk@pd.tnic>
Date:   Wed, 10 Jan 2018 22:10:58 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        David Woodhouse <dwmw2@...radead.org>,
        Andi Kleen <andi@...stfloor.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Paul Turner <pjt@...gle.com>,
        Andrew Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Jiri Kosina <jikos@...nel.org>, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] x86/alternatives: Fix optimize_nops() checking

On Wed, Jan 10, 2018 at 01:05:08PM -0800, Linus Torvalds wrote:
> Any jumps *within* the alternatives should have been handled by the
> assembler already.
> 
> And jumps between the alternatives and other places? Why do they exist?

Yap, I say so too, the alternatives handle everything just fine but then
Woodhouse appeared... :-)

-- 
Regards/Gruss,
    Boris.

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