On Thursday 15 September 2011, Grant Likely wrote:
> > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> > index 21574bd..1836cdf 100644
> > --- a/drivers/mfd/Kconfig
> > +++ b/drivers/mfd/Kconfig
> > @@ -2,10 +2,9 @@
> > # Multifunction miscellaneous devices
> > #
> >
> > -menuconfig MFD_SUPPORT
> > - bool "Multifunction device drivers"
> > +menuconfig MFD_CORE
> > + tristate "Multifunction device drivers"
> > depends on HAS_IOMEM
> > - default y
>
> Looks like there is a bug here. Kconfig symbols with dependencies
> (HAS_IOMEM) must not ever be selected by other symbols because Kconfig
> doesn't implement a way to resolve them. This patch means that every
> "select MFD_CORE" just assumes that HAS_IOMEM is also selected.
That is probably a fair assumption though. Almost all architectures
set HAS_IOMEM unconditionally, and the other ones (probably just s390)
would not select MFD_CORE.
Note that Samuel already took the other patch in the end, so it doesn't
matter. The patch I posted encloses the entire directory in "if HAS_IOMEM".
Arnd
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