taglinefilesource code
pps_freq238include/linux/timex.hextern long pps_freq;    /* frequency offset (scaled ppm) */
pps_freq678kernel/sched.cltemp = time_freq + pps_freq;
pps_freq161kernel/time.clong pps_freq = 0;    /* frequency offset (scaled ppm) */
pps_freq319kernel/time.ctxc.ppsfreq     = pps_freq;