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PM: domains: Move the next_wakeup variable into the struct gpd_timing_data

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If the corresponding genpd for the device doesn't use a governor, the
variable next_wakeup within the struct generic_pm_domain_data becomes
superfluous.

To avoid wasting memory, let's move it into the struct gpd_timing_data,
which is already being allocated based upon if there is governor assigned.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2022-05-11 16:56:57 +02:00 committed by Rafael J. Wysocki
parent 66d29d802e
commit 9c74f2ac48
3 changed files with 7 additions and 6 deletions
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9
drivers/base/power/domain.c
View file

@ -478,15 +478,16 @@ EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
*/
void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
{
struct generic_pm_domain_data *gpd_data;
struct generic_pm_domain *genpd;
struct gpd_timing_data *td;
genpd = dev_to_genpd_safe(dev);
if (!genpd)
return;
gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
gpd_data->next_wakeup = next;
td = to_gpd_data(dev->power.subsys_data->domain_data)->td;
if (td)
td->next_wakeup = next;
}
EXPORT_SYMBOL_GPL(dev_pm_genpd_set_next_wakeup);
@ -1518,7 +1519,6 @@ static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
gpd_data->base.dev = dev;
gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
gpd_data->next_wakeup = KTIME_MAX;
/* Allocate data used by a governor. */
if (has_governor) {
@ -1530,6 +1530,7 @@ static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
td->constraint_changed = true;
td->effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
td->next_wakeup = KTIME_MAX;
gpd_data->td = td;
}

2
drivers/base/power/domain_governor.c
View file

@ -139,7 +139,7 @@ static void update_domain_next_wakeup(struct generic_pm_domain *genpd, ktime_t n
* is able to enter its optimal idle state.
*/
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
next_wakeup = to_gpd_data(pdd)->next_wakeup;
next_wakeup = to_gpd_data(pdd)->td->next_wakeup;
if (next_wakeup != KTIME_MAX && !ktime_before(next_wakeup, now))
if (ktime_before(next_wakeup, domain_wakeup))
domain_wakeup = next_wakeup;

2
include/linux/pm_domain.h
View file

@ -182,6 +182,7 @@ struct gpd_timing_data {
s64 suspend_latency_ns;
s64 resume_latency_ns;
s64 effective_constraint_ns;
ktime_t next_wakeup;
bool constraint_changed;
bool cached_suspend_ok;
};
@ -200,7 +201,6 @@ struct generic_pm_domain_data {
unsigned int performance_state;
unsigned int default_pstate;
unsigned int rpm_pstate;
ktime_t next_wakeup;
void *data;
};