system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-27 05:39:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

cpufreq: use light-weight cpufreq_cpu_get_raw() in __cpufreq_add_dev()

Browse source 
We just need to check if a 'policy' is already present for the cpu we are
adding. We don't need to take all the locks and do kobject usage updates. Use
the light-weight cpufreq_cpu_get_raw() routine instead.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2015-01-02 12:34:33 +05:30 committed by Rafael J. Wysocki
parent 7f0c020ab6
commit d7a9771c1a
1 changed files with 2 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/cpufreq/cpufreq.c
View file

@ -1116,11 +1116,9 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
/* check whether a different CPU already registered this
* CPU because it is in the same boat. */
policy = cpufreq_cpu_get(cpu);
if (unlikely(policy)) {
cpufreq_cpu_put(policy);
policy = cpufreq_cpu_get_raw(cpu);
if (unlikely(policy))
return 0;
}
if (!down_read_trylock(&cpufreq_rwsem))
return 0;