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authorArnd Bergmann <arnd@arndb.de>2018-04-27 16:40:16 +0300
committerThomas Gleixner <tglx@linutronix.de>2018-05-19 14:57:33 +0300
commit06aa376903b6e8c8741395a4702d78d47c7c27c6 (patch)
treef314891509345522dc90fcb93c0e14369bc5b745 /include/linux/timekeeping.h
parentb9ff604cff1135cc576cf952d394ed9401aa234b (diff)
downloadlinux-06aa376903b6e8c8741395a4702d78d47c7c27c6.tar.xz
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 <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
Diffstat (limited to 'include/linux/timekeeping.h')
-rw-r--r--include/linux/timekeeping.h24
1 files changed, 23 insertions, 1 deletions
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
*/