linux-kernel - Re: [PATCH 6/24] make atomic_read() behave consistently on frv

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Message-ID: <7680.1186822071@redhat.com>
Date:	Sat, 11 Aug 2007 09:47:51 +0100
From:	David Howells <dhowells@...hat.com>
To:	Chris Snook <csnook@...hat.com>
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, torvalds@...ux-foundation.org,
	netdev@...r.kernel.org, akpm@...ux-foundation.org, ak@...e.de,
	heiko.carstens@...ibm.com, davem@...emloft.net,
	schwidefsky@...ibm.com, wensong@...ux-vs.org, horms@...ge.net.au,
	wjiang@...ilience.com, cfriesen@...tel.com, zlynx@....org,
	rpjday@...dspring.com, jesper.juhl@...il.com
Subject: Re: [PATCH 6/24] make atomic_read() behave consistently on frv

Chris Snook <csnook@...hat.com> wrote:

> cpu_relax() contains a barrier, so it should do the right thing.  For non-smp
> architectures, I'm concerned about interacting with interrupt handlers.  Some
> drivers do use atomic_* operations.

I'm not sure that actually answers my question.  Why not smp_rmb()?

David
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