karampin@Gauss:~/code/src$ grep -r -e get_uptime .
./drivers/fxp/fxp.c:    reply.DL_CLCK = get_uptime();
./drivers/at_wini/at_wini.c:  if (OK != s) printf("AT_WINI: warning, get_uptime failed: %d\n",s);
./kernel/clock.c: *   get_uptime:       get realtime since boot in clock ticks
./kernel/clock.c: *                             get_uptime                                   *
./kernel/clock.c:PUBLIC clock_t get_uptime()
./kernel/proc.c:        (m_ptr)->NOTIFY_TIMESTAMP = get_uptime();                       \
./kernel/system/do_times.c:  m_ptr->T_BOOT_TICKS = get_uptime();
./kernel/system/do_setalarm.c:  uptime = get_uptime();
./kernel/system/do_setalarm.c:      tp->tmr_exp_time = (use_abs_time) ? exp_time : exp_time + get_uptime();
./kernel/proto.h:_PROTOTYPE( clock_t get_uptime, (void)