timekeeping: Provide ktime_get[*]_ns() helpers

A lot of code converts either timespecs or ktime_t to
nanoseconds. Provide helper functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 64c81f367866..903ecc10fcff 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -145,6 +145,21 @@ static inline ktime_t ktime_mono_to_real(ktime_t mono)
         return ktime_mono_to_any(mono, TK_OFFS_REAL);
 }
 
+static inline u64 ktime_get_ns(void)
+{
+        return ktime_to_ns(ktime_get());
+}
+
+static inline u64 ktime_get_real_ns(void)
+{
+        return ktime_to_ns(ktime_get_real());
+}
+
+static inline u64 ktime_get_boot_ns(void)
+{
+        return ktime_to_ns(ktime_get_boottime());
+}
+
 /*
  * RTC specific
  */