net/sched/hfsc: allocate tcf block for hfsc root class
Without this filters cannot be attached. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: 6529eaba ("net: sched: introduce tcf block infractructure") Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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