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From: Arnd Bergmann <arnd@arndb.de>
To: linux-kernel@vger.kernel.org
Cc: Alexandre Courbot <acourbot@nvidia.com>,
        Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH] gpio: include linux/bug.h in interface header
Date: Thu, 08 May 2014 15:42:25 +0200
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Today's linux-next kernel started showing build errors for the
use of WARN_ON in linux/gpio/consumer.h:

In file included from drivers/video/backlight/pwm_bl.c:13:0:
include/linux/gpio/consumer.h: In function 'gpiod_put':
include/linux/gpio/consumer.h:81:2: error: implicit declaration of function 'WARN_ON' [-Werror=implicit-function-declaration]

It's not clear why this never happened before, but this patch
fixes it by including the header that contains the defintion
of this macro.

Signed-off-by: Arnd Bergmann <arnd@arnd.de>

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index bed128e..073b9b1 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -1,6 +1,7 @@
 #ifndef __LINUX_GPIO_CONSUMER_H
 #define __LINUX_GPIO_CONSUMER_H
 
+#include <linux/bug.h>
 #include <linux/err.h>
 #include <linux/kernel.h>