linux-kernel - Re: [PATCH] move orion_nand's probe function to .devinit.text

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Message-ID: <alpine.LFD.2.00.0907131536070.3138@xanadu.home>
Date:	Mon, 13 Jul 2009 15:37:23 -0400 (EDT)
From:	Nicolas Pitre <nico@...vell.com>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	Greg KH <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Lennert Buijtenhek <buytenh@...vell.com>,
	Saeed Bishara <saeed@...vell.com>,
	Jörn Engel <joern@...fs.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] move orion_nand's probe function to .devinit.text

On Sat, 11 Jul 2009, Uwe Kleine-König wrote:

> A pointer to orion_nand_probe is passed to the core via
> platform_driver_register and so the function must not disappear when the
> .init sections are discarded.  Otherwise (if also having HOTPLUG=y)
> unbinding and binding a device to the driver via sysfs will result in an
> oops as does a device being registered late.
> 
> An alternative to this patch is using platform_driver_probe instead of
> platform_driver_register plus removing the pointer to the probe function
> from the struct platform_driver.

For those kind of platform devices I'd prefer the alternative.


Nicolas