From 8fc54f68919298ff9689d980efb495707ef43f30 Mon Sep 17 00:00:00 2001
From: Daniel Borkmann <dborkman@redhat.com>
Date: Sat, 23 Aug 2014 20:58:54 +0200
Subject: net: use reciprocal_scale() helper

Replace open codings of (((u64) <x> * <y>) >> 32) with reciprocal_scale().

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/sched/sch_fq_codel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'net/sched/sch_fq_codel.c')

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 063b726bf1f8..cc56c8bb9bed 100644
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -77,7 +77,8 @@ static unsigned int fq_codel_hash(const struct fq_codel_sched_data *q,
 	hash = jhash_3words((__force u32)keys.dst,
 			    (__force u32)keys.src ^ keys.ip_proto,
 			    (__force u32)keys.ports, q->perturbation);
-	return ((u64)hash * q->flows_cnt) >> 32;
+
+	return reciprocal_scale(hash, q->flows_cnt);
 }
 
 static unsigned int fq_codel_classify(struct sk_buff *skb, struct Qdisc *sch,
-- 
cgit v1.2.3-59-g8ed1b