diff options
| -rw-r--r-- | kernel/sched/core.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 89e7283015a6..efdca2f08222 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1623,8 +1623,10 @@ void wake_up_if_idle(int cpu) struct rq *rq = cpu_rq(cpu); unsigned long flags; - if (!is_idle_task(rq->curr)) - return; + rcu_read_lock(); + + if (!is_idle_task(rcu_dereference(rq->curr))) + goto out; if (set_nr_if_polling(rq->idle)) { trace_sched_wake_idle_without_ipi(cpu); @@ -1635,6 +1637,9 @@ void wake_up_if_idle(int cpu) /* Else cpu is not in idle, do nothing here */ raw_spin_unlock_irqrestore(&rq->lock, flags); } + +out: + rcu_read_unlock(); } bool cpus_share_cache(int this_cpu, int that_cpu) |