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authorAndreas Schwab <schwab@linux-m68k.org>2012-10-24 22:16:34 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 00:33:07 +0100
commit8636fd280e970696be62c8495a5aacb5f3b6237d (patch)
tree654bc5707fde353a8fdbdf6121d4c54cadd51440 /drivers/cpufreq/cpufreq_governor.c
parentdb7011516cbfc3d867b77721f77258d36cfbf705 (diff)
downloadop-kernel-dev-8636fd280e970696be62c8495a5aacb5f3b6237d.zip
op-kernel-dev-8636fd280e970696be62c8495a5aacb5f3b6237d.tar.gz
cpufreq: fix jiffies/cputime mixup in conservative/ondemand governors
The function get_cpu_idle_time_jiffy in both the conservative and ondemand governors use jiffies_to_usecs to convert a cputime value to usecs which gives the wrong value on architectures where cputime and jiffies use different units. Only matters if NO_HZ is disabled, since otherwise get_cpu_idle_time_us should already return a valid value, and get_cpu_idle_time_jiffy isn't actually called. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.c')
-rw-r--r--drivers/cpufreq/cpufreq_governor.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index 0001071..679842a 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -33,9 +33,9 @@ static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
idle_time = cur_wall_time - busy_time;
if (wall)
- *wall = jiffies_to_usecs(cur_wall_time);
+ *wall = cputime_to_usecs(cur_wall_time);
- return jiffies_to_usecs(idle_time);
+ return cputime_to_usecs(idle_time);
}
cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
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