From: Thomas Schlichter <schlicht@uni-mannheim.de>
To: Jeff Garzik <jgarzik@pobox.com>, ricardo.b@zmail.pt
Subject: Re: SET_MODULE_OWNER
Date: Thu, 17 Jul 2003 17:56:17 +0200
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On Thursday 17 July 2003 17:32, Jeff Garzik wrote:
> Ricardo Bugalho wrote:
> > Hi all,
> >   most net device drivers have replaced MOD_INC/DEC_USE_COUNT with
> > SET_MODULE_OWNER but SET_MODULE_OWNER doesn't do nothing.
> >   Therefore, those modules (though I can only vouch for 8139too) always
> > report 0 use. Some people that had "modprobe -r" in their cronttab found
> > it quite annoying.
> >   I'd guess that there's a good reason for why struct net_device doesn't
> > have .owner field and why this happens. Can someone be so kind to point
> > it
> > out?
>
> struct net_device does have an owner field, and SET_MODULE_OWNER
> obviously _does_ do something.

That's not correct for 2.5.x anymore...
Have a look at Changeset 1.1167 from davem.

It removed the owner field about 9 weeks ago. That was the time where 
SET_MODULE_OWNER became a NOP...

> If your interface is up, your net driver's module refcount is greater
> than zero.

Well, as I looked now my netdevice is up, but its reference count is at 0, 
too!

  Thomas Schlichter
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