linux-kernel - [PATCH] mfd: syscon: include errno.h from header

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Date:	Wed, 23 Mar 2016 11:36:53 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mfd: syscon: include errno.h from header

The syscon header uses the ENOTSUPP error constant, but doesn't
include the header that defines it. This causes a build error
after the imx pinctrl driver started using syscon:

include/linux/mfd/syscon.h: In function 'syscon_node_to_regmap':
include/linux/mfd/syscon.h:32:18: error: 'ENOTSUPP' undeclared (first use in this function)
  return ERR_PTR(-ENOTSUPP);
                  ^~~~~~~~

This adds the missing #include.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 8626ada871f1 ("pinctrl: imx: attach iomuxc device to gpr syscon")
---
 include/linux/mfd/syscon.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h
index 1088149be0c9..40a76b97b7ab 100644
--- a/include/linux/mfd/syscon.h
+++ b/include/linux/mfd/syscon.h
@@ -16,6 +16,7 @@
 #define __LINUX_MFD_SYSCON_H__
 
 #include <linux/err.h>
+#include <linux/errno.h>
 
 struct device_node;
 
-- 
2.7.0