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-rw-r--r--kernel/sched.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 0cfe0310ed5d..27d3e73a2af6 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1208,11 +1208,17 @@ int get_nohz_timer_target(void)
int i;
struct sched_domain *sd;
+ rcu_read_lock();
for_each_domain(cpu, sd) {
- for_each_cpu(i, sched_domain_span(sd))
- if (!idle_cpu(i))
- return i;
+ for_each_cpu(i, sched_domain_span(sd)) {
+ if (!idle_cpu(i)) {
+ cpu = i;
+ goto unlock;
+ }
+ }
}
+unlock:
+ rcu_read_unlock();
return cpu;
}
/*
@@ -2415,12 +2421,14 @@ ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
struct sched_domain *sd;
schedstat_inc(p, se.statistics.nr_wakeups_remote);
+ rcu_read_lock();
for_each_domain(this_cpu, sd) {
if (cpumask_test_cpu(cpu, sched_domain_span(sd))) {
schedstat_inc(sd, ttwu_wake_remote);
break;
}
}
+ rcu_read_unlock();
}
#endif /* CONFIG_SMP */