linux-kernel - Re: register long sp asm("r1") incorrect

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Message-ID: <20100215073405.GB20456@atrey.karlin.mff.cuni.cz>
Date:	Mon, 15 Feb 2010 08:34:05 +0100
From:	Pavel Machek <pavel@....cz>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	paulus@...ba.org, linuxppc-dev@...abs.org,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: register long sp asm("r1") incorrect

> On Tue, 2010-02-09 at 16:24 +0100, Pavel Machek wrote:
> > ...according to gcc docs, sp should be global, or placement in
> > register is not guaranteed (except at asm boundaries, but there are
> > none).
> 
> Sorry I'm not sure I grok what you mean.

Well, according to gcc doscs and my experience, local "register int
__asm()" variables only work by accident (or not at all).
									Pavel
-- 
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