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

[Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>]

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.masahiro@xxxxxxxxxxxxx>
---

 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