linux-kernel - Re: x86-64: Maintain 16-byte stack alignment

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Message-ID: <20170112074059.GA30151@gmail.com>
Date:   Thu, 12 Jan 2017 08:40:59 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: x86-64: Maintain 16-byte stack alignment


* Andy Lutomirski <luto@...capital.net> wrote:

> I find it rather annoying that gcc before 4.8 malfunctions when it
> sees __aligned__(16) on x86_64 kernels.  Sigh.

Ran into this when writing silly FPU in-kernel testcases a couple of months ago...

Thanks,

	Ingo