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

[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.masahiro@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

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

[Stephen Boyd]

Quoting Masahiro Yamada (2019-07-17 23:51:01)
> 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@socionext.com>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

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

[Linus Walleij]

On Thu, Jul 18, 2019 at 8:51 AM Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:

> 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@socionext.com>

Patch applied with Stephen's ACK.

Yours,
Linus Walleij