From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarkko Nikula Subject: Re: [alsa-devel] [PATCH] OMAP: McBSP: Do not use extensive spin locks for dma_op_mode Date: Tue, 27 Oct 2009 16:00:00 +0200 Message-ID: <20091027160000.f276e706.jhnikula@gmail.com> References: <1256641215-26131-1-git-send-email-peter.ujfalusi@nokia.com> <1256641643.30157.339.camel@eenurkka-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bw0-f219.google.com ([209.85.218.219]:57828 "EHLO mail-bw0-f219.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752162AbZJ0N7N (ORCPT ); Tue, 27 Oct 2009 09:59:13 -0400 Received: by bwz19 with SMTP id 19so221393bwz.28 for ; Tue, 27 Oct 2009 06:59:17 -0700 (PDT) In-Reply-To: <1256641643.30157.339.camel@eenurkka-desktop> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: ext-eero.nurkkala@nokia.com Cc: "Ujfalusi Peter (Nokia-D/Tampere)" , "tony@atomide.com" , "alsa-devel@alsa-project.org" , "linux-omap@vger.kernel.org" , "Valentin Eduardo (Nokia-D/Helsinki)" , "broonie@opensource.wolfsonmicro.com" On Tue, 27 Oct 2009 13:07:23 +0200 Eero Nurkkala wrote: > Otherwise, that spinlocking is highly unnecessary and things are > far better without than with it. The only case it could be useful > is in SMPs, but OMAPs are not such quite yet - and when they > are, things will need to be re-though anyway. > Following commit is suggesting that mcbsp code *must* be SMP safe already now: commit a5b92cc348299c20be215b9f4b50853ecfbf3864 Author: Syed Rafiuddin Date: Tue Jul 28 18:57:10 2009 +0530 ARM: OMAP4: Add McBSP support -- Jarkko