linux-kernel - Re: [PATCH 2/6] Blackfin Serial Driver: Add a debug function to serial driver.

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Message-ID: <20081015083811.GA21237@shell.devel.redhat.com>
Date:	Wed, 15 Oct 2008 04:38:11 -0400
From:	Alan Cox <alan@...hat.com>
To:	gyang <graf.yang@...log.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Bryan Wu <cooloney@...nel.org>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH 2/6] Blackfin Serial Driver: Add a debug function to serial driver.

On Wed, Oct 15, 2008 at 10:23:41AM +0800, gyang wrote:
> We are making a SMP like patch to blackfin, cpu_relax() is replaced by a
> data cache flush function which will count it to a per-cpu counter.
> If this serial function is called too early, the per-cpu data area have
> not been initialized, this call will cause crash.
> So we'd like to use barrier() instead of cpu_relax().

Can you split that out as a separate change and include the explanation in
the patch then.

Thanks
Alan
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