linux-kernel - Re: tq 2440

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Message-ID: <20100715165141.GA21272@suse.de>
Date:	Thu, 15 Jul 2010 09:51:41 -0700
From:	Greg KH <gregkh@...e.de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Conke Hu <conke.hu@...il.com>, CoffBeta <coffbeta@...il.com>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	inux kernel <linux-kernel@...r.kernel.org>,
	ext-jani.1.nikula@...ia.com,
	Uwe Kleine-K?nig <u.kleine-koenig@...gutronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: tq 2440

On Thu, Jul 15, 2010 at 05:35:26PM +0100, Russell King - ARM Linux wrote:
> On Thu, Jul 15, 2010 at 11:16:30PM +0800, Conke Hu wrote:
> > ever notice to the following kernel log?
> > "Device 's3c2440-nand' does not have a release() function, it is
> > broken and must."
> > release() function should be implemented  in the platform_device.
> 
> That's not telling you to provide a release function.  The warning is
> telling you that a device is being unregistered which doesn't have a
> release function.
> 
> Consider this point - maybe it doesn't have a release function because
> it's not supposed to be unregistered?

Heh, well, it is being unregistered, and at that point in time, the
kernel complains.

All kobjects need a release function that actually frees it.  If not,
that is a logic bug.  Please see the Documentation/kobject.txt file for
details.

thanks,

greg k-h
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