Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764762AbXHKAzb (ORCPT ); Fri, 10 Aug 2007 20:55:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757443AbXHKAzM (ORCPT ); Fri, 10 Aug 2007 20:55:12 -0400 Received: from rhun.apana.org.au ([64.62.148.172]:1518 "EHLO arnor.apana.org.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756714AbXHKAzK (ORCPT ); Fri, 10 Aug 2007 20:55:10 -0400 From: Herbert Xu To: csnook@redhat.com (Chris Snook) Subject: Re: [PATCH 6/24] make atomic_read() behave consistently on frv Cc: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, torvalds@linux-foundation.org, netdev@vger.kernel.org, akpm@linux-foundation.org, ak@suse.de, heiko.carstens@de.ibm.com, davem@davemloft.net, schwidefsky@de.ibm.com, wensong@linux-vs.org, horms@verge.net.au, wjiang@resilience.com, cfriesen@nortel.com, zlynx@acm.org, rpjday@mindspring.com, jesper.juhl@gmail.com Organization: Core In-Reply-To: <46BCC26B.6080600@redhat.com> X-Newsgroups: apana.lists.os.linux.kernel,apana.lists.os.linux.netdev User-Agent: tin/1.7.4-20040225 ("Benbecula") (UNIX) (Linux/2.6.17-rc4 (i686)) Message-Id: Date: Sat, 11 Aug 2007 08:54:46 +0800 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 811 Lines: 20 Chris Snook 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~} Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/