linux-kernel - Re: [PATCH v2 1/3] timekeeping: Add persistent_clock

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Message-ID: <50F5B29A.7050703@linaro.org>
Date:	Tue, 15 Jan 2013 11:48:42 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	Feng Tang <feng.tang@...el.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	linux-kernel@...r.kernel.org,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Subject: Re: [PATCH v2 1/3] timekeeping: Add persistent_clock_exist flag

On 01/15/2013 08:09 AM, Feng Tang wrote:
> In current kernel, there are several places which need to check
> whether there is a persistent clock for the platform. Current check
> is done by calling the read_persistent_clock() and validating its
> return value.
>
> So one optimization is to do the check only once in timekeeping_init(),
> and use a flag persistent_clock_exist to record it.
>
> v2: Add a has_persistent_clock() helper function, as suggested by John.

Applied! Thanks
-john

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