linux-kernel - Re: [PATCH v1 2/3] Input: gpio-keys

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Date:   Fri, 1 Jun 2018 11:34:16 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Jeffy Chen <jeffy.chen@...k-chips.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/3] Input: gpio-keys - Switch to bitmap_zalloc()

On Fri, Jun 01, 2018 at 11:31:19AM +0300, Andy Shevchenko wrote:
> Switch to bitmap_zalloc() to show clearly what we are allocating.
> Besides that it returns pointer of bitmap type instead of opaque void *.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

> ---
>  drivers/input/keyboard/gpio_keys.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
> index 052e37675086..492a971b95b5 100644
> --- a/drivers/input/keyboard/gpio_keys.c
> +++ b/drivers/input/keyboard/gpio_keys.c
> @@ -196,7 +196,7 @@ static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata,
>  	ssize_t ret;
>  	int i;
>  
> -	bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL);
> +	bits = bitmap_zalloc(n_events, GFP_KERNEL);
>  	if (!bits)
>  		return -ENOMEM;
>  
> @@ -216,7 +216,7 @@ static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata,
>  	buf[ret++] = '\n';
>  	buf[ret] = '\0';
>  
> -	kfree(bits);
> +	bitmap_free(bits);
>  
>  	return ret;
>  }
> @@ -240,7 +240,7 @@ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata,
>  	ssize_t error;
>  	int i;
>  
> -	bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL);
> +	bits = bitmap_zalloc(n_events, GFP_KERNEL);
>  	if (!bits)
>  		return -ENOMEM;
>  
> @@ -284,7 +284,7 @@ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata,
>  	mutex_unlock(&ddata->disable_lock);
>  
>  out:
> -	kfree(bits);
> +	bitmap_free(bits);
>  	return error;
>  }
>  
> -- 
> 2.17.0
> 

-- 
Dmitry