On Tue, Nov 06, 2018 at 07:21:41PM +0100, Geert Uytterhoeven wrote:

> > +#include <asm-generic/pci_iomap.h>

> Is this sufficient?

> include/asm-generic/pci_iomap.h provides the dummies if CONFIG_PCI=n and
> CONFIG_GENERIC_PCI_IOMAP=y, while arch/sh/Kconfig selects GENERIC_PCI_IOMAP
> only if PCI is enabled. Hence it's not set in the failing config
> (sh/allyesconfig).

Ah, possibly not - IIRC I minimized the config when testing but I
could've got the GENERIC_PCI_IOMAP=y.

> Probably SH should select GENERIC_PCI_IOMAP unconditionally, like most other
> architectures do (alpha and powerpc select it conditionally, though)?

I'd be surprised if it had a strong reason not to.