linux-kernel - Re: [BUG] __copy_to_user_inatomic broken on non Pentium machines

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Message-ID: <20070325183010.GA12676@elte.hu>
Date:	Sun, 25 Mar 2007 20:30:10 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Stable Kernel Team <stable@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Adrian Bunk <bunk@...sta.de>
Subject: Re: [BUG] __copy_to_user_inatomic broken on non Pentium machines


* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> On Sun, 25 Mar 2007, Thomas Gleixner wrote:
> >
> > Environment: Pre Pentium systems, (boot_cpu_data.wp_works_ok == 0)
> 
> This shouldn't be "pre-pentium", afaik. WP-works-ok on i486 too. I 
> think only the original i386 had this bug ("feature").
> 
> But I agree, it does seem to be broken on such machines (I assume you 
> don't actually have one, but just tested by forcing it by hand ;)

actually, AFAIK this is a genuine i386 box Thomas has (an embedded 
board). Our hardware legacies and the resulting dependencies _really_ 
stick around for quite long time :-/

	Ingo
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