NSEC_PER_USEC
return (ktime_add_ns(kt, us * NSEC_PER_USEC));
return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
return (ktime_divns(kt, NSEC_PER_USEC));
tv->tv_usec * NSEC_PER_USEC;
tv->tv_usec * NSEC_PER_USEC;
do_div(temp, NSEC_PER_USEC);
do_div(temp, NSEC_PER_USEC);
delta.tv_sec * NSEC_PER_SEC + delta.tv_nsec + (NSEC_PER_USEC / 2);
do_div(temp, NSEC_PER_USEC);
NSEC_PER_USEC;