linux-kernel - Re: [tip:timers/core] alarmtimer: Make sure we initialize the rtctimer

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Date:	Sat, 24 Mar 2012 10:24:52 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	linux-kernel@...r.kernel.org, hpa@...or.com,
	john.stultz@...aro.org, tglx@...utronix.de, jhbird.choi@...il.com
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:timers/core] alarmtimer: Make sure we initialize the
 rtctimer


* tip-bot for John Stultz <john.stultz@...aro.org> wrote:

> Commit-ID:  ad30dfa94c5cc23931c822922a50bd163ab293a5
> Gitweb:     http://git.kernel.org/tip/ad30dfa94c5cc23931c822922a50bd163ab293a5
> Author:     John Stultz <john.stultz@...aro.org>
> AuthorDate: Fri, 23 Mar 2012 15:52:25 -0700
> Committer:  John Stultz <john.stultz@...aro.org>
> CommitDate: Fri, 23 Mar 2012 16:23:12 -0700
> 
> alarmtimer: Make sure we initialize the rtctimer
> 
> jonghwan Choi reported seeing warnings with the alarmtimer
> code at suspend/resume time, and pointed out that the
> rtctimer isn't being properly initialized.
> 
> This patch corrects this issue.
> 
> Reported-by: jonghwan Choi <jhbird.choi@...il.com>
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
>  kernel/time/alarmtimer.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
> index 8a46f5d..c165488 100644
> --- a/kernel/time/alarmtimer.c
> +++ b/kernel/time/alarmtimer.c
> @@ -46,9 +46,10 @@ static struct alarm_base {
>  static ktime_t freezer_delta;
>  static DEFINE_SPINLOCK(freezer_delta_lock);
>  
> +static struct rtc_timer		rtctimer;
> +
>  #ifdef CONFIG_RTC_CLASS
>  /* rtc timer and device for setting alarm wakeups at suspend */
> -static struct rtc_timer		rtctimer;
>  static struct rtc_device	*rtcdev;
>  static DEFINE_SPINLOCK(rtcdev_lock);
>  
> @@ -783,6 +784,8 @@ static int __init alarmtimer_init(void)
>  		.nsleep		= alarm_timer_nsleep,
>  	};
>  
> +	rtc_timer_init(&rtctimer, NULL, NULL);
> +
>  	posix_timers_register_clock(CLOCK_REALTIME_ALARM, &alarm_clock);
>  	posix_timers_register_clock(CLOCK_BOOTTIME_ALARM, &alarm_clock);

This commit breaks every build that has CONFIG_RTC_LIB disabled:

 alarmtimer.c:(.init.text+0x1cc7): undefined reference to `rtc_timer_init'

Thanks,

	Ingo
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