netdev - [PATCH net-next 3/6] sched: Eliminate use of flow_keys in sch_fq

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Date:	Sun,  1 Mar 2015 14:09:46 -0800
From:	Tom Herbert <therbert@...gle.com>
To:	davem@...emloft.net, netdev@...r.kernel.org,
	eric.dumazet@...il.com, fw@...len.de
Subject: [PATCH net-next 3/6] sched: Eliminate use of flow_keys in sch_fq_codel

Call qdisc_skb_get_hash instead of doing skb_flow_dissect and then
jhash by hand.

Signed-off-by: Tom Herbert <therbert@...gle.com>
---
 net/sched/sch_fq_codel.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 1e52dec..a6fc53d 100644
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -23,7 +23,6 @@
 #include <linux/vmalloc.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
-#include <net/flow_keys.h>
 #include <net/codel.h>
 
 /*	Fair Queue CoDel.
@@ -68,15 +67,9 @@ struct fq_codel_sched_data {
 };
 
 static unsigned int fq_codel_hash(const struct fq_codel_sched_data *q,
-				  const struct sk_buff *skb)
+				  struct sk_buff *skb)
 {
-	struct flow_keys keys;
-	unsigned int hash;
-
-	skb_flow_dissect(skb, &keys);
-	hash = jhash_3words((__force u32)keys.dst,
-			    (__force u32)keys.src ^ keys.ip_proto,
-			    (__force u32)keys.ports, q->perturbation);
+	u32 hash = skb_get_hash_perturb(skb, q->perturbation);
 
 	return reciprocal_scale(hash, q->flows_cnt);
 }
-- 
2.2.0.rc0.207.ga3a616c

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