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asm-generic/gpio.h: add some forward decls of the device struct 

After the recent commit a4177ee7f, attempting to include asm-generic/gpio.h
in otherwise "slim" code results in ugly warnings like so:

  CC      arch/blackfin/kernel/bfin_gpio.o
In file included from arch/blackfin/include/asm/gpio.h:278,
                 from arch/blackfin/kernel/bfin_gpio.c:15:
include/asm-generic/gpio.h:193: warning:
‘struct device’ declared inside parameter list
its scope is only this definition or declaration, which is probably not what you want

So add simple C forward decls of the struct device to avoid these.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Mike Frysinger 2009-12-09 06:53:39 -05:00 committed by Arnd Bergmann
parent 4029a91f0c
commit 1f018c8d0d
1 changed files with 3 additions and 0 deletions
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3
include/asm-generic/gpio.h
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@ -28,6 +28,7 @@ static inline int gpio_is_valid(int number)
return ((unsigned)number) < ARCH_NR_GPIOS;
}
struct device;
struct seq_file;
struct module;
@ -181,6 +182,8 @@ static inline void gpio_set_value_cansleep(unsigned gpio, int value)
#ifndef CONFIG_GPIO_SYSFS
struct device;
/* sysfs support is only available with gpiolib, where it's optional */
static inline int gpio_export(unsigned gpio, bool direction_may_change)