[PATCH] gpio: refactor gpiochip_allocate_mask() with bitmap_alloc()

[Masahiro Yamada]

Refactor gpiochip_allocate_mask() slightly by using bitmap_alloc().

I used bitmap_free() for the corresponding free parts. Actually,
bitmap_free() is a wrapper of kfree(), but I did this for consistency.

Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---

 drivers/gpio/gpiolib.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 3ee99d070608..5ac2daa01a53 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -350,7 +350,7 @@ static unsigned long *gpiochip_allocate_mask(struct 
gpio_chip *chip)
 {
        unsigned long *p;
 
-       p = kmalloc_array(BITS_TO_LONGS(chip->ngpio), sizeof(*p), GFP_KERNEL);
+       p = bitmap_alloc(chip->ngpio, GFP_KERNEL);
        if (!p)
                return NULL;
 
@@ -391,7 +391,7 @@ static int gpiochip_init_valid_mask(struct gpio_chip 
*gpiochip)
 
 static void gpiochip_free_valid_mask(struct gpio_chip *gpiochip)
 {
-       kfree(gpiochip->valid_mask);
+       bitmap_free(gpiochip->valid_mask);
        gpiochip->valid_mask = NULL;
 }
 
@@ -1626,7 +1626,7 @@ static int gpiochip_irqchip_init_valid_mask(struct 
gpio_chip *gpiochip)
 
 static void gpiochip_irqchip_free_valid_mask(struct gpio_chip *gpiochip)
 {
-       kfree(gpiochip->irq.valid_mask);
+       bitmap_free(gpiochip->irq.valid_mask);
        gpiochip->irq.valid_mask = NULL;
 }
 
-- 
2.17.1