CLOCK_SOURCE_CALIBRATED
.flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_CALIBRATED,
clocksource_tsc.flags |= CLOCK_SOURCE_CALIBRATED;
.flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_CALIBRATED,
CLOCK_SOURCE_CALIBRATED | \
if (watchdog->flags & CLOCK_SOURCE_CALIBRATED && cs->flags & CLOCK_SOURCE_CALIBRATED)