static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
{
- unsigned long flags, prev_scale, *scale;
unsigned long long tsc_now, ns_now;
+ unsigned long flags, *scale;
local_irq_save(flags);
sched_clock_idle_sleep_event();
rdtscll(tsc_now);
ns_now = __cycles_2_ns(tsc_now);
- prev_scale = *scale;
if (cpu_khz)
*scale = (NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR)/cpu_khz;
mark_tsc_unstable("cpufreq changes");
}
- preempt_disable();
- set_cyc2ns_scale(tsc_khz_ref, smp_processor_id());
- preempt_enable();
+ set_cyc2ns_scale(tsc_khz_ref, freq->cpu);
return 0;
}
/* hpet or pmtimer available ? */
if (!hpet && !pm1 && !pm2) {
printk(KERN_INFO "TSC calibrated against PIT\n");
- return;
+ goto out;
}
/* Check, whether the sampling was disturbed by an SMI */
if (tsc1 == ULONG_MAX || tsc2 == ULONG_MAX) {
printk(KERN_WARNING "TSC calibration disturbed by SMI, "
"using PIT calibration result\n");
- return;
+ goto out;
}
tsc2 = (tsc2 - tsc1) * 1000000L;
tsc_khz = tsc2 / tsc1;
+out:
for_each_possible_cpu(cpu)
set_cyc2ns_scale(tsc_khz, cpu);
}