s390/Kconfig: remove PCI dependency from HAS_IOMEM

HAS_IOMEM was defined as def_bool PCI on s390, making it false on kernels
built without PCI support. This made sense until now as the IOMEM code
was only required if PCI was enabled. This will change as KVM will
require IOMEM in the future. To simplify the config space, turn
HAS_IOMEM on unconditionally by default.

All other architectures either do not override HAS_IOMEM or set it
unconditionally. s390 was the only architecture where HAS_IOMEM could be
false on a real system.

Since HAS_IOMEM=y now causes kernel/iomem.o and lib/devres.o to be built
unconditionally, ioremap()/iounmap() must always be available.
Select GENERIC_IOREMAP unconditionally to provide the generic
implementations for the PCI=n case.

Previously GENERIC_IOREMAP was conditioned on CONFIG_PCI in lockstep
with HAS_IOMEM, so mm/ioremap.c was never built without PCI. Therefore,
guard the PCI override macros ioremap_prot, iounmap, and ioremap_wc with
CONFIG_PCI.

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>

0 files changed, 0 insertions, 0 deletions