rk3568 rt init

hc

2023-11-06 e3e12f52b214121840b44c91de5b3e5af5d3eb84

 kernel/net/sched/sch_generic.c
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@@ -576,7 +576,11 @@
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 	.ops		=	&noop_qdisc_ops,
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 	.q.lock		=	__SPIN_LOCK_UNLOCKED(noop_qdisc.q.lock),
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 	.dev_queue	=	&noop_netdev_queue,
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+#ifdef CONFIG_PREEMPT_RT_BASE
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+	.running	=	__SEQLOCK_UNLOCKED(noop_qdisc.running),
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+#else
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 	.running	=	SEQCNT_ZERO(noop_qdisc.running),
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+#endif
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 	.busylock	=	__SPIN_LOCK_UNLOCKED(noop_qdisc.busylock),
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 	.gso_skb = {
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 		.next = (struct sk_buff *)&noop_qdisc.gso_skb,
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@@ -877,9 +881,17 @@
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 	lockdep_set_class(&sch->busylock,
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 			  dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
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+#ifdef CONFIG_PREEMPT_RT_BASE
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+	seqlock_init(&sch->running);
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+	lockdep_set_class(&sch->running.seqcount,
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+			  dev->qdisc_running_key ?: &qdisc_running_key);
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+	lockdep_set_class(&sch->running.lock,
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+			  dev->qdisc_running_key ?: &qdisc_running_key);
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+#else
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 	seqcount_init(&sch->running);
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 	lockdep_set_class(&sch->running,
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 			  dev->qdisc_running_key ?: &qdisc_running_key);
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+#endif
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 	sch->ops = ops;
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 	sch->flags = ops->static_flags;
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@@ -1253,7 +1265,7 @@
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 	/* Wait for outstanding qdisc_run calls. */
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 	list_for_each_entry(dev, head, close_list) {
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 		while (some_qdisc_is_busy(dev))
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-			yield();
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+			msleep(1);
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 		/* The new qdisc is assigned at this point so we can safely
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 		 * unwind stale skb lists and qdisc statistics
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 		 */