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gpiolib: Add 'struct gpio_chip' forward declaration for !GPIOLIB case 

With CONFIG_GPIOLIB=n, the 'struct gpio_chip' is not declared,
so the following pops up on PowerPC:

  cc1: warnings being treated as errors
  In file included from arch/powerpc/platforms/52xx/mpc52xx_common.c:19:
  include/linux/of_gpio.h:74: warning: 'struct gpio_chip' declared
                              inside parameter list
  include/linux/of_gpio.h:74: warning: its scope is only this definition
                              or declaration, which is probably not what
			      you want
  include/linux/of_gpio.h:75: warning: 'struct gpio_chip' declared
                              inside parameter list
  make[2]: *** [arch/powerpc/platforms/52xx/mpc52xx_common.o] Error 1

This patch fixes the issue by providing the proper forward declaration.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Anton Vorontsov 2010-09-01 08:55:24 -06:00 committed by Grant Likely
parent 9f1a1fca35
commit 4e4438b865
1 changed files with 1 additions and 0 deletions
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include/linux/gpio.h
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@ -13,6 +13,7 @@
#include <linux/errno.h>
struct device;
struct gpio_chip;
/*
* Some platforms don't support the GPIO programming interface.