timekeeping: Add more coarse clocktai/boottime interfaces (06aa3769) · Commits · 戴 / test

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:

Arnd Bergmann <arnd@arndb.de> Signed-off-by:

Thomas 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

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
		*/

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