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Date:	Tue, 3 Jun 2008 10:31:02 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Scott Wood <scottwood@...escale.com>
Cc:	Jeff Garzik <jeff@...zik.org>, netdev@...r.kernel.org,
	linuxppc-dev@...abs.org, adrian.bunk@...ial.fi
Subject: Re: [RFC] Make board force selection of PHYLIB


On Jun 3, 2008, at 10:18 AM, Scott Wood wrote:

> Kumar Gala wrote:
>> On Jun 3, 2008, at 10:10 AM, Scott Wood wrote:
>>> I'd rather avoid adding another case where the kernel needs to  
>>> know what modules are being built, though, especially if the  
>>> result of changing the .config and building modules is a  
>>> mysterious runtime failure (due to a missing platform fixup)  
>>> rather than compile- or insertion-time.
>> I don't follow what you are getting at here.  Is this something  
>> more than #ifdef PHYLIB in the platform code?
>
> If you just #ifdef PHYLIB, then things will break if the user does  
> this:
> make config, GIANFAR=PHYLIB=n
> make zImage
> make config, GIANFAR=PHYLIB=m
> make modules
>
> And the cause of the failure will not be something that obviously  
> points to a build problem, such as unresolved symbols.

what you are suggesting will not break with my patch.

The second case will for PHYLIB=y w/the select.

> I'd rather just unconditionally select PHYLIB on platforms that need  
> to do fixups.

But you don't need fix ups for the phy if you don't have the enet  
driver that the phy is connected to in your system.

(But I do understand the desire to be generous, but I think we can get  
this right).

- k
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