On Wednesday 30 March 2016 08:29:45 Rob Herring wrote:

On Wed, Mar 30, 2016 at 5:03 AM, Arnd Bergmann [off-list ref] wrote:

quoted

On Wednesday 30 March 2016 10:13:53 Richard Weinberger wrote:

quoted

I fully understand your point of view. COMPILE_TEST is a monster that
can do the heavy lifting for you, but monsters also have claws and fangs.

Having COMPILE_TEST having depend on !UML works for me. But don't
we have other archs without io mem? At least a few years ago while
porting nandsim to UML I found s390 that lacks of io mem too.

s390 gained IOMEM support when they started having PCI attachments.

I'm confused how s390 defines HAS_IOMEM and includes it from lib/Kconfig though.

Kconfig can define the same symbol multiple times, which is really
confusing. I only checked for NO_IOMEM, which s390 no longer defines,
but I have not checked what actually happens in case of two conflicting
definitions, where the one lib/Kconfig defaults to 'y' and the one in
arch/s390 defaults to CONFIG_PCI.

	Arnd