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time: Expose getboottime64 for in-kernel uses

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Adds a timespec64 based getboottime64() implementation
that can be used as we convert internal users of
getboottime away from using timespecs.

Cc: pang.xunlei <pang.xunlei@linaro.org>
Cc: Arnd Bergmann <arnd.bergmann@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2014-12-08 12:00:09 -08:00
parent 8b618628b2
commit d08c0cdd26
2 changed files with 20 additions and 8 deletions
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16
include/linux/timekeeping.h
View File

@ -33,6 +33,7 @@ extern time64_t ktime_get_real_seconds(void);
extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);
extern void getboottime64(struct timespec64 *ts);
#if BITS_PER_LONG == 64
/**
@ -72,6 +73,11 @@ static inline struct timespec get_monotonic_coarse(void)
{
return get_monotonic_coarse64();
}
static inline void getboottime(struct timespec *ts)
{
return getboottime64(ts);
}
#else
/**
* Deprecated. Use do_settimeofday64().
@ -129,9 +135,15 @@ static inline struct timespec get_monotonic_coarse(void)
{
return timespec64_to_timespec(get_monotonic_coarse64());
}
#endif
extern void getboottime(struct timespec *ts);
static inline void getboottime(struct timespec *ts)
{
struct timespec64 ts64;
getboottime64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
#endif
#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
#define ktime_get_real_ts64(ts) getnstimeofday64(ts)

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)
{