Re: [PATCH] x86 - Make CONFIG_OLPC dependent on CONFIG_MGEODE_LX

On Wed, 2008-11-12 at 15:29 +0100, Takashi Iwai wrote:
At Wed, 12 Nov 2008 08:54:10 -0500, Jeremy Katz wrote:
It's not about angering, it's about causing regressions in
functionality. Doing this will completely break the ability to run
generic distros on the OLPC hardware without a special kernel. Which
has been something that a lot of work has gone on upstream to avoid for
all sorts of cases (VMI, Xen, SMP, ...).

But, it is broken. The asm/olpc includes asm/geode.h and it refers
geode_gpio*() there.

The geode_gpio() users in asm/olpc.h are for some defines that really
probably don't belong there and which aren't used elsewhere in the main
tree afaict from a quick grep. I'd be glad to send the patch to remove
it :-)

but what we really need to
do is to make geode_gpio* defined even when we're not specifically
building with MGEODE_LX. I'm not sure how best to do that, but the
answer probably includes using the generic x86 gpio api.

This probably needs to be done as a precondition for getting the alsa
changes merged or the alsa changes need to have the bits which depend on
geode_gpio ripped out until it can be done.

Then let's stop inclusion of asm/geode.h from asm/olpc.h at first.
Any driver codes including asm/geode.h can be broken potentially
without a proper dependency.

Yes, but having a driver dependent on building for a specific x86
variant is quite wrong. What would people think about a driver which
was dependent on CONFIG_M586? Keep in mind that CONFIG_M686 wouldn't
then apply...

Jeremy

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