cpufreq: Remove cpufreq_frequency_get_table()
Most of the callers of cpufreq_frequency_get_table() already have the
pointer to a valid 'policy' structure and they don't really need to go
through the per-cpu variable first and then a check to validate the
frequency, in order to find the freq-table for the policy.
Directly use the policy->freq_table field instead for them.
Only one user of that API is left after above changes, cpu_cooling.c and
it accesses the freq_table in a racy way as the policy can get freed in
between.
Fix it by using cpufreq_cpu_get() properly.
Since there are no more users of cpufreq_frequency_get_table() left, get
rid of it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Javi Merino <javi.merino@arm.com> (cpu_cooling.c)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index c6a14ba..cc252ee 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -126,15 +126,6 @@
}
EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
-struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
-{
- struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
-
- return policy && !policy_is_inactive(policy) ?
- policy->freq_table : NULL;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
-
static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
u64 idle_time;
@@ -1950,7 +1941,7 @@
if (!cpufreq_driver->target_index)
return -EINVAL;
- freq_table = cpufreq_frequency_get_table(policy->cpu);
+ freq_table = policy->freq_table;
if (unlikely(!freq_table)) {
pr_err("%s: Unable to find freq_table\n", __func__);
return -EINVAL;
@@ -2345,26 +2336,25 @@
*********************************************************************/
static int cpufreq_boost_set_sw(int state)
{
- struct cpufreq_frequency_table *freq_table;
struct cpufreq_policy *policy;
int ret = -EINVAL;
for_each_active_policy(policy) {
- freq_table = cpufreq_frequency_get_table(policy->cpu);
- if (freq_table) {
- ret = cpufreq_frequency_table_cpuinfo(policy,
- freq_table);
- if (ret) {
- pr_err("%s: Policy frequency update failed\n",
- __func__);
- break;
- }
+ if (!policy->freq_table)
+ continue;
- down_write(&policy->rwsem);
- policy->user_policy.max = policy->max;
- cpufreq_governor_limits(policy);
- up_write(&policy->rwsem);
+ ret = cpufreq_frequency_table_cpuinfo(policy,
+ policy->freq_table);
+ if (ret) {
+ pr_err("%s: Policy frequency update failed\n",
+ __func__);
+ break;
}
+
+ down_write(&policy->rwsem);
+ policy->user_policy.max = policy->max;
+ cpufreq_governor_limits(policy);
+ up_write(&policy->rwsem);
}
return ret;