From: Alan <alan@lxorguk.ukuu.org.uk>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [rfc PATCH] ieee1394: ohci1394: delete bogus spinlock, flush MMIO writes
Date: Tue, 28 Nov 2006 21:56:21 +0000 [thread overview]
Message-ID: <20061128215621.2e0ac9a6@localhost.localdomain> (raw)
In-Reply-To: <tkrat.9660c0c3e547e1fd@s5r6.in-berlin.de>
On Tue, 28 Nov 2006 22:24:11 +0100 (CET)
Stefan Richter <stefanr@s5r6.in-berlin.de> wrote:
> All MMIO writes which were surrounded by the spinlock as well as the
> very last MMIO write of the IRQ handler are now explicitly flushed by
> MMIO reads of the respective register.
MMIO is ordered anyway on the bus, you just need mmiowb() to force
ordering to the bus controller in case you are on a big numa box.
next prev parent reply other threads:[~2006-11-28 21:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-28 21:24 [rfc PATCH] ieee1394: ohci1394: delete bogus spinlock, flush MMIO writes Stefan Richter
2006-11-28 21:56 ` Alan [this message]
2006-11-28 23:50 ` Stefan Richter
2006-11-29 1:26 ` Alan
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