net/sched: Replace call_rcu_bh() and rcu_barrier_bh() (ae0e3349) · Commits · 戴 / test

net/sched/sch_api.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -540,7 +540,7 @@ void qdisc_put_stab(struct qdisc_size_table *tab)

		if (--tab->refcnt == 0) {
		list_del(&tab->list);
		call_rcu_bh(&tab->rcu, stab_kfree_rcu);
		call_rcu(&tab->rcu, stab_kfree_rcu);
		}
		}
		EXPORT_SYMBOL(qdisc_put_stab);

+4 −4

Original line number	Diff line number	Diff line
		@@ -1372,7 +1372,7 @@ void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp,
		if (!tp_head) {
		RCU_INIT_POINTER(*miniqp->p_miniq, NULL);
		/* Wait for flying RCU callback before it is freed. */
		rcu_barrier_bh();
		rcu_barrier();
		return;
		}

		@@ -1380,10 +1380,10 @@ void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp,
		&miniqp->miniq1 : &miniqp->miniq2;

		/* We need to make sure that readers won't see the miniq
		* we are about to modify. So wait until previous call_rcu_bh callback
		* we are about to modify. So wait until previous call_rcu callback
		* is done.
		*/
		rcu_barrier_bh();
		rcu_barrier();
		miniq->filter_list = tp_head;
		rcu_assign_pointer(*miniqp->p_miniq, miniq);

		@@ -1392,7 +1392,7 @@ void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp,
		* block potential new user of miniq_old until all readers
		* are not seeing it.
		*/
		call_rcu_bh(&miniq_old->rcu, mini_qdisc_rcu_func);
		call_rcu(&miniq_old->rcu, mini_qdisc_rcu_func);
		}
		EXPORT_SYMBOL(mini_qdisc_pair_swap);