linux-kernel - Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic

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Message-ID: <4A1B0ACD.8020502@zytor.com>
Date:	Mon, 25 May 2009 14:17:01 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	lkml@...ethan.org
CC:	Harald Welte <HaraldWelte@...tech.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic

Michael S. Zick wrote:
> On Mon May 25 2009, Michael S. Zick wrote:
> 
> In actual application, this *should not* make a difference.
> 

No kidding.  This is a valid transformation for integers, since it is
all done with 2's-complement arithmetic.

Floating-point numbers is a whole other game.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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