Merge "qos: Pass the list of cpus with affected qos to notifer" (ca235beb) · Commits · e / devices / android_kernel_fairphone_FP4

kernel/power/qos.c

+17 −6

Original line number	Diff line number	Diff line
		@@ -265,7 +265,8 @@ 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;
		@@ -288,9 +289,12 @@ 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];
		}
		}

		/**
		* pm_qos_update_target - manages the constraints list and calls the notifiers
		@@ -308,6 +312,7 @@ int pm_qos_update_target(struct pm_qos_constraints c, struct plist_node node,
		{
		unsigned long flags;
		int prev_value, curr_value, new_value;
		struct cpumask cpus;
		int ret;

		spin_lock_irqsave(&pm_qos_lock, flags);
		@@ -339,18 +344,24 @@ int pm_qos_update_target(struct pm_qos_constraints c, struct plist_node node,
		}

		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);

		trace_pm_qos_update_target(action, prev_value, curr_value);
		if (prev_value != curr_value) {

		/*
		* if cpu mask bits are set, call the notifier call chain
		* to update the new qos restriction for the cores
		*/

		if (!cpumask_empty(&cpus)) {
		ret = 1;
		if (c->notifiers)
		blocking_notifier_call_chain(c->notifiers,
		(unsigned long)curr_value,
		NULL);
		(unsigned long)curr_value, &cpus);
		} else {
		ret = 0;
		}