linux-kernel - Re: [lm-sensors] [patch 1/5] hwmon: Convert fschmd to unlocked

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Date:	Thu, 17 Dec 2009 14:12:43 +0100
From:	Jean Delvare <khali@...ux-fr.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, lm-sensors@...sensors.org,
	Hans de Goede <hdegoede@...hat.com>
Subject: Re: [lm-sensors] [patch 1/5] hwmon: Convert fschmd to 
 unlocked_ioctl

Hi Thomas,

On Fri, 6 Nov 2009 16:56:34 +0100 (CET), Thomas Gleixner wrote:
> On Fri, 6 Nov 2009, Jean Delvare wrote:
> > I'm not sure why we need to hold the mutex here? My understanding is
> > that watchdog_data_mutex protects watchdog_data_list and each
> > watchdog's kref. And the above code doesn't touch either.
> > 
> > What I am more worried about is why ident is declared static. This
> > looks like a bug to me. Instead of abusing watchdog_data_mutex to
> > workaround this, I'd rather remove the "static". I guess that the
> > current code happens to work because neither data->revision nor
> > nowayout can change over time, but this looks needlessly fragile.
> 
> Right, we can change ident to be non static instead of abusing the
> mutex. Stupid me. Will fix.

This was quite some time ago and I can't seem to find an updated version
of your patch that I could apply. Care to send one?

Thanks,
-- 
Jean Delvare
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