linux-kernel - Re: [PATCH v2 05/20] alpha: change do_timer() to xtime

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Message-ID: <alpine.LFD.2.00.1101311120530.31804@localhost6.localdomain6>
Date:	Mon, 31 Jan 2011 11:23:21 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Torben Hohn <torbenh@....de>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>, johnstul@...ibm.com,
	hch@...radead.org, yong.zhang0@...il.com,
	Matt Turner <mattst88@...il.com>,
	Richard Henderson <rth@...ddle.net>
Subject: Re: [PATCH v2 05/20] alpha: change do_timer() to xtime_update()

On Thu, 27 Jan 2011, Torben Hohn wrote:

> xtime_update() takes the xtime_lock itself.
> state does not to be protected with this lock.
> its only touched here and during init.

xtime_lock very well serializes the access to state on
SMP. timer_interrupt() is called on each cpu. So that wont work.

Thanks,

	tglx
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