linux-kernel - [PATCH] of: include errno.h in of

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Date:	Mon,  2 May 2016 12:59:19 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Rob Herring <robh+dt@...nel.org>,
	Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>
Cc:	Dave Airlie <airlied@...hat.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org, Arnd Bergmann <arnd@...db.de>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] of: include errno.h in of_graph.h

When CONFIG_OF is disabled, we have to include linux/errno.h before
including of_graph.h, or get build errors like in the newly added
sun4i drm driver:

In file included from ../drivers/gpu/drm/sun4i/sun4i_drv.c:14:0:
include/linux/of_graph.h: In function 'of_graph_parse_endpoint':
include/linux/of_graph.h:58:10: error: 'ENOSYS' undeclared (first use in this function)

A better solution is to ensure that the header can be included
by itself, so let's include linux/errno.h here to fix the error
we just got, and any similar future error.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 9026e0d122ac ("drm: Add Allwinner A10 Display Engine support")
---
 include/linux/of_graph.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index f8bcd0e21a26..bb3a5a2cd570 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -15,6 +15,7 @@
 #define __LINUX_OF_GRAPH_H
 
 #include <linux/types.h>
+#include <linux/errno.h>
 
 /**
  * struct of_endpoint - the OF graph endpoint data structure
-- 
2.7.0