linux-kernel - Re: [PATCH V7 5/8] ptp: Added a brand new class driver for ptp clocks.

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Message-Id: <201012161657.24058.arnd@arndb.de>
Date:	Thu, 16 Dec 2010 16:57:23 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	netdev@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Christoph Lameter <cl@...ux.com>,
	David Miller <davem@...emloft.net>,
	John Stultz <johnstul@...ibm.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	Peter Zijlstra <peterz@...radead.org>,
	Rodolfo Giometti <giometti@...ux.it>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH V7 5/8] ptp: Added a brand new class driver for ptp clocks.

On Thursday 16 December 2010, Richard Cochran wrote:
> This patch adds an infrastructure for hardware clocks that implement
> IEEE 1588, the Precision Time Protocol (PTP). A class driver offers a
> registration method to particular hardware clock drivers. Each clock is
> presented as a standard POSIX clock.
> 
> The ancillary clock features are exposed in two different ways, via
> the sysfs and by a character device.
> 
> Signed-off-by: Richard Cochran <richard.cochran@...cron.at>

Looks fine to me, with one tiny comment:

> +
> +/* private globals */
> +
> +extern struct device_attribute ptp_dev_attrs[]; /* see ptp_sysfs.c */

The declaration is in a C file, better move it into a header in order
to make sure the definition matches the declaration.

	Arnd
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