backport/backport-include/linux/timekeeping.h

   1 #ifndef __BACKPORT_TIMEKEEPING_H
   2 #define __BACKPORT_TIMEKEEPING_H
   3 #include <linux/version.h>
   4 #include <linux/types.h>
   5
   6 #if LINUX_VERSION_IS_GEQ(3,17,0)
   7 #include_next <linux/timekeeping.h>
   8 #endif
   9
  10 #if LINUX_VERSION_IS_LESS(3,17,0)
  11 #define ktime_get_ns LINUX_BACKPORT(ktime_get_ns)
  12 extern ktime_t ktime_get(void);
  13 #define ktime_get_ns LINUX_BACKPORT(ktime_get_ns)
  14 static inline u64 ktime_get_ns(void)
  15 {
  16         return ktime_to_ns(ktime_get());
  17 }
  18
  19 extern ktime_t ktime_get_boottime(void);
  20 #define ktime_get_boot_ns LINUX_BACKPORT(ktime_get_boot_ns)
  21 static inline u64 ktime_get_boot_ns(void)
  22 {
  23         return ktime_to_ns(ktime_get_boottime());
  24 }
  25 #endif /* < 3.17 */
  26
  27 #if LINUX_VERSION_IS_LESS(4,18,0)
  28 static inline time64_t ktime_get_boottime_seconds(void)
  29 {
  30         return ktime_divns(ktime_get_boottime(), NSEC_PER_SEC);
  31 }
  32 #endif /* < 4.18 */
  33
  34 #if LINUX_VERSION_IS_LESS(3,19,0)
  35 static inline time64_t ktime_get_seconds(void)
  36 {
  37         struct timespec t;
  38
  39         ktime_get_ts(&t);
  40
  41         return t.tv_sec;
  42 }
  43
  44 static inline time64_t ktime_get_real_seconds(void)
  45 {
  46         struct timeval tv;
  47
  48         do_gettimeofday(&tv);
  49
  50         return tv.tv_sec;
  51 }
  52 #endif
  53
  54 #if LINUX_VERSION_IS_LESS(3,17,0)
  55 static inline void ktime_get_ts64(struct timespec64 *ts)
  56 {
  57         ktime_get_ts(ts);
  58 }
  59 #endif
  60
  61 #endif /* __BACKPORT_TIMEKEEPING_H */