[PKT_SCHED]: Add and use prio2list() in the pfifo_fast qdisc

prio2list() returns the relevant sk_buff_head for the
band specified by the priority for a given skb.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 8 deletions

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 03cf001adb41..a08a98e7b943 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -311,12 +311,17 @@ static const u8 prio2band[TC_PRIO_MAX+1] =
    generic prio+fifo combination.
  */
 
-static int
-pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc* qdisc)
+static inline struct sk_buff_head *prio2list(struct sk_buff *skb,
+                                             struct Qdisc *qdisc)
 {
         struct sk_buff_head *list = qdisc_priv(qdisc);
+        return list + prio2band[skb->priority & TC_PRIO_MAX];
+}
 
-        list += prio2band[skb->priority&TC_PRIO_MAX];
+static int
+pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc* qdisc)
+{
+        struct sk_buff_head *list = prio2list(skb, qdisc);
 
         if (skb_queue_len(list) < qdisc->dev->tx_queue_len) {
                 qdisc->q.qlen++;
@@ -345,12 +350,8 @@ pfifo_fast_dequeue(struct Qdisc* qdisc)
 static int
 pfifo_fast_requeue(struct sk_buff *skb, struct Qdisc* qdisc)
 {
-        struct sk_buff_head *list = qdisc_priv(qdisc);
-
-        list += prio2band[skb->priority&TC_PRIO_MAX];
-
         qdisc->q.qlen++;
-        return __qdisc_requeue(skb, qdisc, list);
+        return __qdisc_requeue(skb, qdisc, prio2list(skb, qdisc));
 }
 
 static void