linux-kernel - Re: [PATCH 06/13] dev->priv to netdev_priv(dev), for drivers/net/ibm

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Message-ID: <20070803174754.GA1352@gate.ebshome.net>
Date:	Fri, 3 Aug 2007 10:47:54 -0700
From:	Eugene Surovegin <ebs@...home.net>
To:	Yoann Padioleau <padator@...adoo.fr>
Cc:	kernel-janitors@...r.kernel.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/13] dev->priv to netdev_priv(dev), for drivers/net/ibm_emac

On Fri, Aug 03, 2007 at 07:34:19PM +0200, Yoann Padioleau wrote:
> 
> Replacing accesses to dev->priv to netdev_priv(dev). The replacment
> is safe when netdev_priv is used to access a private structure that is
> right next to the net_device structure in memory. Cf
> http://groups.google.com/group/comp.os.linux.development.system/browse_thread/thread/de19321bcd94dbb8/0d74a4adcd6177bd
> This is the case when the net_device structure was allocated with
> a call to alloc_netdev or one of its derivative.

NAK.

While that assumption is correct for the actual emac net device, it's 
not for MAL poll one.

You patch breaks a working driver.

-- 
Eugene

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