linux-kernel - Re: [PATCH v4 1/3] clocksource: timer-keystone: introduce clocksource driver for Keystone

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Date:	Wed, 5 Feb 2014 00:35:59 +0200
From:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
To:	Santosh Shilimkar <santosh.shilimkar@...com>,
	Thomas Gleixner <tglx@...utronix.de>
CC:	<rob@...dley.net>, <linux@....linux.org.uk>,
	<galak@...eaurora.org>, <robh+dt@...nel.org>, <pawel.moll@....com>,
	<mark.rutland@....com>, <ijc+devicetree@...lion.org.uk>,
	<daniel.lezcano@...aro.org>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <grygorii.strashko@...com>
Subject: Re: [PATCH v4 1/3] clocksource: timer-keystone: introduce clocksource
 driver for Keystone

Yes. I'll send with __iowmb() instead of wmb().

On 02/05/2014 12:15 AM, Santosh Shilimkar wrote:
> On Tuesday 04 February 2014 03:17 PM, Thomas Gleixner wrote:
>> On Tue, 4 Feb 2014, Ivan Khoronzhuk wrote:
>>
>> Please do not top post.
>>
>>> It was so in v1. But it was decided to use explicit memory barriers,
>>> because we're always sure the memory barriers are there and that
>>> they're properly documented. Also in this case I don't need to add
>>> keystone readl/writel relaxed function variants and to use mixed calls of
>>> writel/writel_relaxed functions.
>>>
>>> See:
>>> http://www.spinics.net/lists/arm-kernel/msg294941.html
>> Fair enough, but we want a proper explanation for explicit barriers in
>> the code and not in some random discussion of patch version X on some
>> random mailing list.
>>
>> Aside of that it should be iowmb(), but I might miss something ...
>>
> Agree. __iowmb() seems to be more appropriate.
>
> Regards,
> Santosh
>

-- 
Regards,
Ivan Khoronzhuk

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