uses CONFIG_UDELAY_TSC uses CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2 uses CONFIG_HAVE_INIT_TIMER default CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=0 if CONFIG_UDELAY_TSC default CONFIG_HAVE_INIT_TIMER=1 object delay_tsc.o end