[PATCH V6 6/7] cpufreq: intel_pstate: Reuse refresh_frequency_limits()

From: Viresh Kumar
Date: Thu Jul 04 2019 - 03:36:52 EST


The implementation of intel_pstate_update_max_freq() is quite similar to
refresh_frequency_limits(), lets reuse it.

Finding minimum of policy->user_policy.max and policy->cpuinfo.max_freq
in intel_pstate_update_max_freq() is redundant as cpufreq_set_policy()
will call the ->verify() callback of intel-pstate driver, which will do
this comparison anyway and so dropping it from
intel_pstate_update_max_freq() doesn't harm.

Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/cpufreq/cpufreq.c | 3 ++-
drivers/cpufreq/intel_pstate.c | 7 +------
include/linux/cpufreq.h | 1 +
3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 81117e4d43cc..091789e868ee 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1116,7 +1116,7 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp
return ret;
}

-static void refresh_frequency_limits(struct cpufreq_policy *policy)
+void refresh_frequency_limits(struct cpufreq_policy *policy)
{
struct cpufreq_policy new_policy;

@@ -1133,6 +1133,7 @@ static void refresh_frequency_limits(struct cpufreq_policy *policy)

up_write(&policy->rwsem);
}
+EXPORT_SYMBOL(refresh_frequency_limits);

static void handle_update(struct work_struct *work)
{
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index f2ff5de988c1..cc27d4c59dca 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -898,7 +898,6 @@ static void intel_pstate_update_policies(void)
static void intel_pstate_update_max_freq(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
- struct cpufreq_policy new_policy;
struct cpudata *cpudata;

if (!policy)
@@ -908,11 +907,7 @@ static void intel_pstate_update_max_freq(unsigned int cpu)
policy->cpuinfo.max_freq = global.turbo_disabled_mf ?
cpudata->pstate.max_freq : cpudata->pstate.turbo_freq;

- memcpy(&new_policy, policy, sizeof(*policy));
- new_policy.max = min(policy->user_policy.max, policy->cpuinfo.max_freq);
- new_policy.min = min(policy->user_policy.min, new_policy.max);
-
- cpufreq_set_policy(policy, &new_policy);
+ refresh_frequency_limits(policy);

cpufreq_cpu_release(policy);
}
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 95425941f46d..1fa37b675a80 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -207,6 +207,7 @@ void cpufreq_cpu_release(struct cpufreq_policy *policy);
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
int cpufreq_set_policy(struct cpufreq_policy *policy,
struct cpufreq_policy *new_policy);
+void refresh_frequency_limits(struct cpufreq_policy *policy);
void cpufreq_update_policy(unsigned int cpu);
void cpufreq_update_limits(unsigned int cpu);
bool have_governor_per_policy(void);
--
2.21.0.rc0.269.g1a574e7a288b