Export dummy_irq_chip to modules to allow them to do things such as

	irq_set_chip_and_handler(virq,
				 &dummy_irq_chip,
				 handle_level_irq);
This fixes

	ERROR: "dummy_irq_chip" [drivers/gpio/gpio-pcf857x.ko] undefined!

when gpio-pcf857x.c is being built as a module.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 kernel/irq/dummychip.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
index b5fcd96..988dc58 100644
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c

@@ -6,6 +6,7 @@
  */
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/export.h>
 
 #include "internals.h"
 

@@ -57,3 +58,4 @@ struct irq_chip dummy_irq_chip = {
 	.irq_mask	= noop,
 	.irq_unmask	= noop,
 };
+EXPORT_SYMBOL_GPL(dummy_irq_chip);

-- 
1.7.5.4