suseconds_t
static int hp_sdc_mlc_in(hil_mlc *mlc, suseconds_t timeout)
typedef int (hil_mlc_in) (hil_mlc *mlc, suseconds_t timeout);
tv.tv_usec = (suseconds_t)ts.tv_nsec / 1000;
suseconds_t usecs = ktime_to_us(ktime_sub(kt, bear_cookie->expiration));