[PATCH] drivers: mfd: mfd-core: disable irq_domain related code when 'HAVE_GENERIC_HARDIRQS' disabled.

[Chen Gang <gang.chen@asianux.com>]

'irq_domain' depends on hard irqs, so for the architectures which have
no hard irqs, but still need mfd (e.g. s390), need disable the related
code, or can not pass compiling.

The related commit:

  "c94bb23 mfd: Make MFD core code Device Tree and IRQ domain aware"

The related error: (with allmodconfig under s390)

  ERROR: "irq_create_mapping" [drivers/mfd/mfd-core.ko] undefined!


Signed-off-by: Chen Gang <gang.chen@asianux.com>
---
 drivers/mfd/mfd-core.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 7604f4e..8e56a74 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -129,13 +129,16 @@ static int mfd_add_device(struct device *parent, int id,
 			res[r].end = mem_base->start +
 				cell->resources[r].end;
 		} else if (cell->resources[r].flags & IORESOURCE_IRQ) {
+#ifdef HAVE_GENERIC_HARDIRQS
 			if (domain) {
 				/* Unable to create mappings for IRQ ranges. */
 				WARN_ON(cell->resources[r].start !=
 					cell->resources[r].end);
 				res[r].start = res[r].end = irq_create_mapping(
 					domain, cell->resources[r].start);
-			} else {
+			} else
+#endif
+			{
 				res[r].start = irq_base +
 					cell->resources[r].start;
 				res[r].end   = irq_base +
-- 
1.7.7.6