[PATCH 5.9 235/255] cpufreq: Introduce governor flags

Greg Kroah-Hartman
2020-11-17T13:41:46Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

commit 9a2a9ebc0a758d887ee06e067e9f7f0b36ff7574 upstream.

A new cpufreq governor flag will be added subsequently, so replace
the bool dynamic_switching fleid in struct cpufreq_governor with a
flags field and introduce CPUFREQ_GOV_DYNAMIC_SWITCHING to set for
the "dynamic switching" governors instead of it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/cpufreq/cpufreq.c | 2 +-
drivers/cpufreq/cpufreq_governor.h | 2 +-
include/linux/cpufreq.h | 9 +++++++--
kernel/sched/cpufreq_schedutil.c | 2 +-
4 files changed, 10 insertions(+), 5 deletions(-)

--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2233,7 +2233,7 @@ static int cpufreq_init_governor(struct
return -EINVAL;

/* Platform doesn't want dynamic frequency switching ? */
- if (policy->governor->dynamic_switching &&
+ if (policy->governor->flags & CPUFREQ_GOV_DYNAMIC_SWITCHING &&
cpufreq_driver->flags & CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING) {
struct cpufreq_governor *gov = cpufreq_fallback_governor();

--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -156,7 +156,7 @@ void cpufreq_dbs_governor_limits(struct
#define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) \
{ \
.name = _name_, \
- .dynamic_switching = true, \
+ .flags = CPUFREQ_GOV_DYNAMIC_SWITCHING, \
.owner = THIS_MODULE, \
.init = cpufreq_dbs_governor_init, \
.exit = cpufreq_dbs_governor_exit, \
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -565,12 +565,17 @@ struct cpufreq_governor {
char *buf);
int (*store_setspeed) (struct cpufreq_policy *policy,
unsigned int freq);
- /* For governors which change frequency dynamically by themselves */
- bool dynamic_switching;
struct list_head governor_list;
struct module *owner;
+ u8 flags;
};

+/* Governor flags */
+
+/* For governors which change frequency dynamically by themselves */
+#define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0)
+
+
/* Pass a target to the cpufreq driver */
unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
unsigned int target_freq);
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -896,7 +896,7 @@ static void sugov_limits(struct cpufreq_
struct cpufreq_governor schedutil_gov = {
.name = "schedutil",
.owner = THIS_MODULE,
- .dynamic_switching = true,
+ .flags = CPUFREQ_GOV_DYNAMIC_SWITCHING,
.init = sugov_init,
.exit = sugov_exit,
.start = sugov_start,