linux-kernel - Re: MMIO and gcc re-ordering issue

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Message-ID: <adad4n82xud.fsf@cisco.com>
Date:	Mon, 26 May 2008 21:08:10 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	David Miller <davem@...emloft.net>, benh@...nel.crashing.org,
	linux-arch@...r.kernel.org, scottwood@...escale.com,
	linuxppc-dev@...abs.org, alan@...rguk.ukuu.org.uk,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	tpiepho@...escale.com
Subject: Re: MMIO and gcc re-ordering issue

 > either via sparse or some fancy lockdep like "device store" thing?
 > If we can't test for it and it doesn't show up on x86 ... it'll just be
 > an eterrnal chase.

Ben's point is that it will start showing up on x86 because newer
compilers are reordering things...

 - R.
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