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c90e95147c
It was added in commite57a784d8c("pkt_sched: set root qdisc before change() in attach_default_qdiscs()") to hide duplicates from "tc qdisc show" for incative deivices. After59cc1f61f("net: sched: convert qdisc linked list to hashtable") it triggered when classful qdisc is added to inactive device because default qdiscs are added before switching root qdisc. Anyway after commitea32746953("net: sched: avoid duplicates in qdisc dump") duplicates are filtered right in dumper. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: David S. Miller <davem@davemloft.net>