clocksource_default_clock 195 include/linux/clocksource.h extern struct clocksource * __init clocksource_default_clock(void); clocksource_default_clock 817 kernel/time/clocksource.c curr_clocksource = clocksource_default_clock(); clocksource_default_clock 1561 kernel/time/timekeeping.c clock = clocksource_default_clock();