[PATCH v2] of_irq.h: fix build warnings when CONFIG_OF is not enabled

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Fix build warnings when CONFIG_OF is not enabled:
(seen on i386 and x86_64)

include/linux/of_irq.h:82:7: warning: 'struct device_node' declared inside parameter list [enabled by default]
include/linux/of_irq.h:82:7: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
include/linux/of_irq.h:87:47: warning: 'struct device_node' declared inside parameter list [enabled by default]

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc:	Grant Likely <grant.likely@xxxxxxxxxx>
Cc:	Rob Herring <rob.herring@xxxxxxxxxxx>
Cc:	devicetree@xxxxxxxxxxxxxxx
---
 include/linux/of_irq.h |    2 ++
 1 file changed, 2 insertions(+)

--- linux-next-20130830.orig/include/linux/of_irq.h
+++ linux-next-20130830/include/linux/of_irq.h
@@ -1,6 +1,8 @@
 #ifndef __OF_IRQ_H
 #define __OF_IRQ_H
 
+struct device_node;
+
 #if defined(CONFIG_OF)
 struct of_irq;
 #include <linux/types.h>
--
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