diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/qos.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 907a90bd20c5..03769831a416 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -266,7 +266,8 @@ static const struct file_operations pm_qos_debug_fops = { .release = single_release, }; -static inline void pm_qos_set_value_for_cpus(struct pm_qos_constraints *c) +static inline void pm_qos_set_value_for_cpus(struct pm_qos_constraints *c, + struct cpumask *cpus) { struct pm_qos_request *req = NULL; int cpu; @@ -290,8 +291,11 @@ static inline void pm_qos_set_value_for_cpus(struct pm_qos_constraints *c) } } - for_each_possible_cpu(cpu) + for_each_possible_cpu(cpu) { + if (c->target_per_cpu[cpu] != qos_val[cpu]) + cpumask_set_cpu(cpu, cpus); c->target_per_cpu[cpu] = qos_val[cpu]; + } } /** @@ -312,6 +316,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, unsigned long flags; int prev_value, curr_value, new_value; struct plist_node *node = &req->node; + struct cpumask cpus; int ret; spin_lock_irqsave(&pm_qos_lock, flags); @@ -342,8 +347,9 @@ int pm_qos_update_target(struct pm_qos_constraints *c, } curr_value = pm_qos_get_value(c); + cpumask_clear(&cpus); pm_qos_set_value(c, curr_value); - pm_qos_set_value_for_cpus(c); + pm_qos_set_value_for_cpus(c, &cpus); spin_unlock_irqrestore(&pm_qos_lock, flags); @@ -353,7 +359,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, if (c->notifiers) blocking_notifier_call_chain(c->notifiers, (unsigned long)curr_value, - NULL); + &cpus); } else { ret = 0; } |