linux-kernel - Re: [linux-usb-devel] [PATCH 2/2] usbnet: use MII hooks only if CONFIG

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Date:	Tue, 31 Oct 2006 11:36:52 -0800
From:	David Brownell <david-b@...bell.net>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	linux-usb-devel@...ts.sourceforge.net,
	Randy Dunlap <randy.dunlap@...cle.com>, akpm@...l.org,
	zippel@...ux-m68k.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, link@...gy.org,
	Christoph Hellwig <hch@...radead.org>, torvalds@...l.org,
	greg@...ah.com, toralf.foerster@....de
Subject: Re: [linux-usb-devel] [PATCH 2/2] usbnet: use MII hooks only if CONFIG_MII is enabled


> > 		...
> > 		depends on MII if MII != n
> > 
> > except that Kconfig doesn't comprehend conditionals like that.
> 
> You can express this in Kconfig:
> 	depends MII || MII=n

Except that:

Warning! Found recursive dependency: USB_USBNET USB_NET_AX8817X MII USB_USBNET

I think this is another case where Kconfig gets in the way and forces
introduction of a pseudovariable.  I'll give that a try.


> But my suggestion was:
> #if defined(CONFIG_MII) || (defined(CONFIG_MII_MODULE) && defined(MODULE))
>
> Or simply select MII ...

Nope; those both prevent completely legit configurations.
MII is not required, except for those two adapter options.


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