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Couple of items for 3.20

Browse source 
* ktime division optimization
 * Expose a few more y2038-safe timekeeping interfaces
 * RTC core changes to address y2038
 
 Signed-off-by: John Stultz <john.stultz@linaro.org>
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Merge tag 'fortglx-3.20-time' of https://git.linaro.org/people/john.stultz/linux into timers/core

Pull time updates from John Stultz for 3.20:

 * ktime division optimization
 * Expose a few more y2038-safe timekeeping interfaces
 * RTC core changes to address y2038
This commit is contained in:
Thomas Gleixner 2015-01-24 10:11:12 +01:00
commit fe31fca35d
10 changed files with 63 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

4
kernel/time/hrtimer.c
View file

@ -266,7 +266,7 @@ lock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
/*
* Divide a ktime value by a nanosecond value
*/
u64 ktime_divns(const ktime_t kt, s64 div)
u64 __ktime_divns(const ktime_t kt, s64 div)
{
u64 dclc;
int sft = 0;
@ -282,7 +282,7 @@ u64 ktime_divns(const ktime_t kt, s64 div)
return dclc;
}
EXPORT_SYMBOL_GPL(ktime_divns);
EXPORT_SYMBOL_GPL(__ktime_divns);
#endif /* BITS_PER_LONG >= 64 */
/*

4
kernel/time/ntp.c
View file

@ -488,13 +488,13 @@ static void sync_cmos_clock(struct work_struct *work)
getnstimeofday64(&now);
if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec * 5) {
struct timespec adjust = timespec64_to_timespec(now);
struct timespec64 adjust = now;
fail = -ENODEV;
if (persistent_clock_is_local)
adjust.tv_sec -= (sys_tz.tz_minuteswest * 60);
#ifdef CONFIG_GENERIC_CMOS_UPDATE
fail = update_persistent_clock(adjust);
fail = update_persistent_clock(timespec64_to_timespec(adjust));
#endif
#ifdef CONFIG_RTC_SYSTOHC
if (fail == -ENODEV)

12
kernel/time/timekeeping.c
View file

@ -1659,24 +1659,24 @@ out:
}
/**
* getboottime - Return the real time of system boot.
* @ts: pointer to the timespec to be set
* getboottime64 - Return the real time of system boot.
* @ts: pointer to the timespec64 to be set
*
* Returns the wall-time of boot in a timespec.
* Returns the wall-time of boot in a timespec64.
*
* This is based on the wall_to_monotonic offset and the total suspend
* time. Calls to settimeofday will affect the value returned (which
* basically means that however wrong your real time clock is at boot time,
* you get the right time here).
*/
void getboottime(struct timespec *ts)
void getboottime64(struct timespec64 *ts)
{
struct timekeeper *tk = &tk_core.timekeeper;
ktime_t t = ktime_sub(tk->offs_real, tk->offs_boot);
*ts = ktime_to_timespec(t);
*ts = ktime_to_timespec64(t);
}
EXPORT_SYMBOL_GPL(getboottime);
EXPORT_SYMBOL_GPL(getboottime64);
unsigned long get_seconds(void)
{