add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/kernel/sched/psi.c
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..
@@ -1225,10 +1225,11 @@
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 	group = t->group;
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 	/*
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-	 * Wakeup waiters to stop polling. Can happen if cgroup is deleted
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-	 * from under a polling process.
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+	 * Wakeup waiters to stop polling and clear the queue to prevent it from
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+	 * being accessed later. Can happen if cgroup is deleted from under a
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+	 * polling process.
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 	 */
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-	wake_up_interruptible(&t->event_wait);
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+	wake_up_pollfree(&t->event_wait);
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 	mutex_lock(&group->trigger_lock);
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