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cpufreq: interactive: Round up timer_rate to match jiffy

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Timers are scheduled in unit of jiffies. Round up timer_rate so that
it matches the actual sampling period.

Change-Id: I88386a5a448e40333f9a9b9f0cf72af58cb54656
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
This commit is contained in:
Junjie Wu
2014-08-15 16:34:37 -07:00
committed by John Stultz
parent 16e989d788
commit 4db1f0ac87
1 changed files with 8 additions and 2 deletions
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10
drivers/cpufreq/cpufreq_interactive.c
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@@ -855,12 +855,18 @@ static ssize_t store_timer_rate(struct cpufreq_interactive_tunables *tunables,
const char *buf, size_t count)
{
int ret;
unsigned long val;
unsigned long val, val_round;
ret = strict_strtoul(buf, 0, &val);
if (ret < 0)
return ret;
tunables->timer_rate = val;
val_round = jiffies_to_usecs(usecs_to_jiffies(val));
if (val != val_round)
pr_warn("timer_rate not aligned to jiffy. Rounded up to %lu\n",
val_round);
tunables->timer_rate = val_round;
return count;
}