ktime_get_raw_fast_ns
return ktime_get_raw_fast_ns();
extern u64 ktime_get_raw_fast_ns(void);
event->clock = &ktime_get_raw_fast_ns;
EXPORT_SYMBOL_GPL(ktime_get_raw_fast_ns);
{ ktime_get_raw_fast_ns, "mono_raw", 1 },
time64_t now = ktime_get_raw_fast_ns();
drop_time = ktime_get_raw_fast_ns();
xtfs->iptfs_settime = ktime_get_raw_fast_ns();
trace_iptfs_timer_expire(xtfs, (unsigned long long)(ktime_get_raw_fast_ns() - settime));