From 06aa376903b6e8c8741395a4702d78d47c7c27c6 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 27 Apr 2018 15:40:16 +0200 Subject: [PATCH] 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: Arnd Bergmann Signed-off-by: Thomas Gleixner Cc: Stephen Boyd Cc: y2038@lists.linaro.org Cc: John Stultz Link: https://lkml.kernel.org/r/20180427134016.2525989-6-arnd@arndb.de --- include/linux/timekeeping.h | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 42f71f4b658a..86bc2026efce 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -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 */ -- 2.25.1