pkt_sched: Add qdisc->ops->peek() implementation.

Add qdisc->ops->peek() implementation for work-conserving qdiscs.
With feedback from Patrick McHardy.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index c1ad6b8de105..cb20ee3b9fc2 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -602,6 +602,7 @@ static struct Qdisc_ops gred_qdisc_ops __read_mostly = {
         .priv_size      =       sizeof(struct gred_sched),
         .enqueue        =       gred_enqueue,
         .dequeue        =       gred_dequeue,
+        .peek           =       qdisc_peek_head,
         .requeue        =       gred_requeue,
         .drop           =       gred_drop,
         .init           =       gred_init,