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Subject[PATCH v10 4/7] sched/fair: Rename select_idle_mask to select_rq_mask
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From: Dietmar Eggemann <dietmar.eggemann@arm.com>

Decouple the name of the per-cpu cpumask select_idle_mask from its usage
in select_idle_[cpu/capacity]() of the CFS run-queue selection
(select_task_rq_fair()).

This is to support the reuse of this cpumask in the Energy Aware
Scheduling (EAS) path (find_energy_efficient_cpu()) of the CFS run-queue
selection.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index c531976ee960..68f5eb8a1de7 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9502,7 +9502,7 @@ static struct kmem_cache *task_group_cache __read_mostly;
#endif

DECLARE_PER_CPU(cpumask_var_t, load_balance_mask);
-DECLARE_PER_CPU(cpumask_var_t, select_idle_mask);
+DECLARE_PER_CPU(cpumask_var_t, select_rq_mask);

void __init sched_init(void)
{
@@ -9551,7 +9551,7 @@ void __init sched_init(void)
for_each_possible_cpu(i) {
per_cpu(load_balance_mask, i) = (cpumask_var_t)kzalloc_node(
cpumask_size(), GFP_KERNEL, cpu_to_node(i));
- per_cpu(select_idle_mask, i) = (cpumask_var_t)kzalloc_node(
+ per_cpu(select_rq_mask, i) = (cpumask_var_t)kzalloc_node(
cpumask_size(), GFP_KERNEL, cpu_to_node(i));
}
#endif /* CONFIG_CPUMASK_OFFSTACK */
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index f87ff939cbf3..bb5311cc5a44 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5898,7 +5898,7 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)

/* Working cpumask for: load_balance, load_balance_newidle. */
DEFINE_PER_CPU(cpumask_var_t, load_balance_mask);
-DEFINE_PER_CPU(cpumask_var_t, select_idle_mask);
+DEFINE_PER_CPU(cpumask_var_t, select_rq_mask);

#ifdef CONFIG_NO_HZ_COMMON

@@ -6388,7 +6388,7 @@ static inline int select_idle_smt(struct task_struct *p, struct sched_domain *sd
*/
static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, bool has_idle_core, int target)
{
- struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
+ struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_rq_mask);
int i, cpu, idle_cpu = -1, nr = INT_MAX;
struct rq *this_rq = this_rq();
int this = smp_processor_id();
@@ -6474,7 +6474,7 @@ select_idle_capacity(struct task_struct *p, struct sched_domain *sd, int target)
int cpu, best_cpu = -1;
struct cpumask *cpus;

- cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
+ cpus = this_cpu_cpumask_var_ptr(select_rq_mask);
cpumask_and(cpus, sched_domain_span(sd), p->cpus_ptr);

task_util = uclamp_task_util(p);
--
2.36.1.255.ge46751e96f-goog
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