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Date:	Thu, 26 Apr 2007 20:50:13 -0400
From:	"John W. Linville" <>
To:	Jean Tourrilhes <>
Cc:	Johannes Berg <>,
	David Miller <>,,
Subject: Re: [PATCH 9/9] net_device: dont include wext bits if not required

On Thu, Apr 26, 2007 at 09:53:04AM -0700, Jean Tourrilhes wrote:
> On Tue, Apr 24, 2007 at 08:07:41PM +0200, Johannes Berg wrote:
> > This patch makes the wext bits in struct net_device depend on
> > 
> > Signed-off-by: Johannes Berg <>
> 	I personally would not do that. Having conditional fields in
> "struct net_device" is very bad, it's a sure way to crash on modules
> in some cases. If I remember well, Jeff Garzik has been fighting those
> over the years.

I'm not sure I understand the reasoning here.  Without a doubt kernel
modules need to be built against the same configuration as the kernels
that are loading them.  So, conditional component of net_device should
not cause crashes.

FWIW, there are other conditionally compiled portions of net_device
(NETPOLL, NET_POLL_CONTROLLER).  I don't see the harm here.

John W. Linville
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