ref_start 1292 arch/x86/kernel/tsc.c static u64 tsc_start = ULLONG_MAX, ref_start; ref_start 1314 arch/x86/kernel/tsc.c tsc_start = tsc_read_refs(&ref_start, hpet); ref_start 1322 arch/x86/kernel/tsc.c if (ref_start == ref_stop) ref_start 1332 arch/x86/kernel/tsc.c freq = calc_hpet_ref(delta, ref_start, ref_stop); ref_start 1334 arch/x86/kernel/tsc.c freq = calc_pmtimer_ref(delta, ref_start, ref_stop);