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gpio: Convert gpio_is_valid to return bool 

Make the code a bit more readable.

Instead of casting an int to an unsigned then comparing to
MAX_NR_GPIOS, add a >= 0 test and let the compiler optimizer
do the conversion to unsigned.

The generated code should be the same.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Joe Perches 2011-05-10 16:23:07 -07:00 committed by Grant Likely
parent 82ab0f75ee
commit 3474cb3cc0
2 changed files with 5 additions and 5 deletions
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6
include/asm-generic/gpio.h
View File

@ -35,9 +35,9 @@
* platform data and other tables.
*/
static inline int gpio_is_valid(int number)
static inline bool gpio_is_valid(int number)
{
return ((unsigned)number) < ARCH_NR_GPIOS;
return number >= 0 && number < ARCH_NR_GPIOS;
}
struct device;
@ -212,7 +212,7 @@ extern void gpio_unexport(unsigned gpio);
#else /* !CONFIG_GPIOLIB */
static inline int gpio_is_valid(int number)
static inline bool gpio_is_valid(int number)
{
/* only non-negative numbers are valid */
return number >= 0;

4
include/linux/gpio.h
View File

@ -25,9 +25,9 @@ struct gpio_chip;
* warning when something is wrongly called.
*/
static inline int gpio_is_valid(int number)
static inline bool gpio_is_valid(int number)
{
return 0;
return false;
}
static inline int gpio_request(unsigned gpio, const char *label)