linux-kernel - Re: [PATCH] alarmtimer: return correct remaining time

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Date:   Mon, 8 Apr 2019 11:47:15 +0530
From:   Mukesh Ojha <mojha@...eaurora.org>
To:     Andrei Vagin <avagin@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, Stephen Boyd <sboyd@...nel.org>,
        John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH] alarmtimer: return correct remaining time


On 4/8/2019 9:45 AM, Andrei Vagin wrote:
> To calculate a remaining time, we need to subtract the current time from
> the expiration time. Currently, arguments of ktime_sub are swapped.
>
> Signed-off-by: Andrei Vagin <avagin@...il.com>
> ---
>   kernel/time/alarmtimer.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
> index 2c97e8c2d29f..0519a8805aab 100644
> --- a/kernel/time/alarmtimer.c
> +++ b/kernel/time/alarmtimer.c
> @@ -594,7 +594,7 @@ static ktime_t alarm_timer_remaining(struct k_itimer *timr, ktime_t now)
>   {
>   	struct alarm *alarm = &timr->it.alarm.alarmtimer;
>   
> -	return ktime_sub(now, alarm->node.expires);
> +	return ktime_sub(alarm->node.expires, now);


Looks good to me.
Reviewed-by: Mukesh Ojha <mojha@...eaurora.org>

Cheers,
-Mukesh

>   }
>   
>   /**