[CPUFREQ] ondemand: don't increase to full speed at startup (Bruno Ducrot)

From: Bruno Ducrot <ducrot@poupinou.org>

dbs_timer_init() will schedule_work(&dbs_work) so that do_dbs_timer()
is likely called very early at same time slice scheduler, and
for each cpu, dbs_check_cpu(cpu) will be called, likely at the same time
slice than dbs_timer_init().
So far, we will get total_idle_ticks == idle_ticks == 0 unconditonaly,
and the processor will be put at full speed even though it's not needed
at startup.


Ack'ed by Venkatesh Pallipadi.
Signed-off-by: Bruno Ducrot <ducrot@poupinou.org>
Signed-off-by: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/cpufreq/cpufreq_ondemand.c

@@ -359,7 +359,8 @@ static void do_dbs_timer(void *data)
 static inline void dbs_timer_init(void)
 {
 	INIT_WORK(&dbs_work, do_dbs_timer, NULL);
-	schedule_work(&dbs_work);
+	schedule_delayed_work(&dbs_work,
+			sampling_rate_in_HZ(dbs_tuners_ins.sampling_rate));
 	return;
 }