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

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Date:	Sat, 11 Aug 2007 08:54:46 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	csnook@...hat.com (Chris Snook)
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.

What problems with interrupt handlers? Access to int/long must
be atomic or we're in big trouble anyway.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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