linux-kernel - Re: [PATCH] [v2] leds: ledtrig-activity: use ktime_get_boot

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Date:   Tue, 19 Jun 2018 22:42:41 +0200
From:   Jacek Anaszewski <jacek.anaszewski@...il.com>
To:     Arnd Bergmann <arnd@...db.de>, Pavel Machek <pavel@....cz>
Cc:     y2038@...ts.linaro.org, Willy Tarreau <w@....eu>,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] leds: ledtrig-activity: use ktime_get_boot_ns()

Hi Arnd,

Thank you for the update.

On 06/19/2018 10:18 AM, Arnd Bergmann wrote:
> get_monotonic_boottime() is deprecated, so let's convert this to
> the simpler ktime_get_boot_ns().
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> v2: don't drop 'cpus' multiplication, as Pavel and Willy point out
>      that needs to be kept
> ---
>   drivers/leds/trigger/ledtrig-activity.c | 5 +----
>   1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
> index 5081894082bd..6c6f8a9b8d9a 100644
> --- a/drivers/leds/trigger/ledtrig-activity.c
> +++ b/drivers/leds/trigger/ledtrig-activity.c
> @@ -37,7 +37,6 @@ static void led_activity_function(struct timer_list *t)
>   	struct activity_data *activity_data = from_timer(activity_data, t,
>   							 timer);
>   	struct led_classdev *led_cdev = activity_data->led_cdev;
> -	struct timespec boot_time;
>   	unsigned int target;
>   	unsigned int usage;
>   	int delay;
> @@ -57,8 +56,6 @@ static void led_activity_function(struct timer_list *t)
>   		return;
>   	}
>   
> -	get_monotonic_boottime(&boot_time);
> -
>   	cpus = 0;
>   	curr_used = 0;
>   
> @@ -76,7 +73,7 @@ static void led_activity_function(struct timer_list *t)
>   	 * down to 16us, ensuring we won't overflow 32-bit computations below
>   	 * even up to 3k CPUs, while keeping divides cheap on smaller systems.
>   	 */
> -	curr_boot = timespec_to_ns(&boot_time) * cpus;
> +	curr_boot = ktime_get_boot_ns() * cpus;
>   	diff_boot = (curr_boot - activity_data->last_boot) >> 16;
>   	diff_used = (curr_used - activity_data->last_used) >> 16;
>   	activity_data->last_boot = curr_boot;
> 

Applied.

-- 
Best regards,
Jacek Anaszewski