On Wed, Jul 27, 2016 at 06:27:51PM +0530, Vinod Koul wrote:
> On Wed, Jul 27, 2016 at 09:53:24AM +0200, Arnd Bergmann wrote:

> > We should be at the point where an 'allmodconfig' build on ARM
> > gets you most of the drivers and builds without warnings (using
> > gcc-4.9 or higher).

> The problem is drivers depend on various ARM sub arch's. That is the
> sole reason why I have multiple configs now.

That shouldn't be the case at least for any new code, things should at
least build OK with an || COMPILE_TEST normally.  Old code may need
fixing up for this.

> Which brings me to another problem :-) why should individual drivers
> depend on ARM sub arch's. Depends on ARM, yes. First look at code tells
> me they shouldn't!, probably sometime back that was true, but I don't
> think that should be the case now, ofcourse you would know better!

The dependencies are there to improve UX when people are configuring
their kernels - it stops them being asked about hardware they can't
possibly have in their system.  If there's no build time reason for it
then it should be (ARCH_FOO || COMPILE_TEST) so people can do build
tests.