From: Tom Herbert <tom@herbertland.com>
Date: Fri, 1 May 2015 18:30:13 +0000 (-0700)
Subject: sched: Call skb_get_hash_perturb in sch_fq_codel
X-Git-Tag: firefly_0821_release~176^2~1587^2~380^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=342db221829f8341e51839e40c47be137dfc6ebe;p=firefly-linux-kernel-4.4.55.git

sched: Call skb_get_hash_perturb in sch_fq_codel

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

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 1e52decb7b59..a6fc53d69513 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);
 }