htb: call qdisc_root with rcu read lock held
saw a debug splat: net/include/net/sch_generic.h:287 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 2 locks held by kworker/2:1/710: #0: ("events"){.+.+.+}, at: [<ffffffff8106ca1d>] #1: ((&q->work)){+.+...}, at: [<ffffffff8106ca1d>] process_one_work+0x14d/0x690 Workqueue: events htb_work_func Call Trace: [<ffffffff812dc763>] dump_stack+0x85/0xc2 [<ffffffff8109fee7>] lockdep_rcu_suspicious+0xe7/0x120 [<ffffffff814ced47>] htb_work_func+0x67/0x70 Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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