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Commit 06aa3769 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Thomas Gleixner
Browse files

timekeeping: Add more coarse clocktai/boottime interfaces 



The set of APIs we provide has a few holes for coarse times, e.g. we
provide ktime_get_coarse_boottime() and ktime_get_boottime_ts64(),
but not the combination of the two.

This adds four new functions:

ktime_get_coarse_boottime_ts64()
ktime_get_boottime_seconds()
ktime_get_coarse_clocktai_ts64()
ktime_get_clocktai_seconds()

to fill in some of the missing pieces. I have missed only the
ktime_get_boottime_seconds() accessor in a few occasions in
the past, but it seems better to just provide all four together,
as there is very little cost to having them.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: y2038@lists.linaro.org
Cc: John Stultz <john.stultz@linaro.org>
Link: https://lkml.kernel.org/r/20180427134016.2525989-6-arnd@arndb.de
parent b9ff604c

include/linux/timekeeping.h

+23 −1
Original line number Diff line number Diff line
@@ -137,18 +137,40 @@ extern u64 ktime_get_boot_fast_ns(void); 
extern u64 ktime_get_real_fast_ns(void);



/*

 * timespec64 interfaces utilizing the ktime based ones

 * timespec64/time64_t interfaces utilizing the ktime based ones

 * for API completeness, these could be implemented more efficiently

 * if needed.

 */

static inline void ktime_get_boottime_ts64(struct timespec64 *ts)

{

	*ts = ktime_to_timespec64(ktime_get_boottime());

}



static inline void ktime_get_coarse_boottime_ts64(struct timespec64 *ts)

{

	*ts = ktime_to_timespec64(ktime_get_coarse_boottime());

}



static inline time64_t ktime_get_boottime_seconds(void)

{

	return ktime_divns(ktime_get_coarse_boottime(), NSEC_PER_SEC);

}



static inline void ktime_get_clocktai_ts64(struct timespec64 *ts)

{

	*ts = ktime_to_timespec64(ktime_get_clocktai());

}



static inline void ktime_get_coarse_clocktai_ts64(struct timespec64 *ts)

{

	*ts = ktime_to_timespec64(ktime_get_coarse_clocktai());

}



static inline time64_t ktime_get_clocktai_seconds(void)

{

	return ktime_divns(ktime_get_coarse_clocktai(), NSEC_PER_SEC);

}



/*

 * RTC specific

 */