linux-kernel - Re: [PATCH 1/2] x86: Force asm-goto

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Date:   Thu, 22 Mar 2018 13:10:44 +0100
From:   Pavel Machek <pavel@....cz>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Jonathan Corbet <corbet@....net>, mingo@...nel.org,
        tglx@...utronix.de, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org
Subject: Re: [PATCH 1/2] x86: Force asm-goto

On Tue 2018-03-20 16:50:36, Peter Zijlstra wrote:
> On Tue, Mar 20, 2018 at 09:45:54AM -0600, Jonathan Corbet wrote:
> > On Mon, 19 Mar 2018 16:41:25 +0100
> > Peter Zijlstra <peterz@...radead.org> wrote:
> > 
> > > A primary prerequisite for this is of course that the compiler
> > > supports asm-goto. This effecively lifts the minimum GCC version to
> > > build an x86 kernel to gcc-4.5.
> > 
> > Given that, how about a patch to Documentation/Changes to reflect the new
> > reality?  It's not in RST yet, so you should be able to go there without
> > ill effect :)
> 
> 
> That thing says:
> 
>   GCC
>   ---
> 
>   The gcc version requirements may vary depending on the type of CPU in your
>   computer. jon
> 
> Which is still entirely accurate. And afaik the 3.2 minimum listed there
> still works for !x86.

Maybe accurate, but pretty user hostile :-(.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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