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net: use reciprocal_scale() helper

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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>
This commit is contained in:
Daniel Borkmann
2014-08-23 20:58:54 +02:00
committed by David S. Miller
parent 690e36e726
commit 8fc54f6891
14 changed files with 24 additions and 22 deletions
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3
net/core/dev.c
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@@ -3124,8 +3124,7 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
}
if (map) {
tcpu = map->cpus[((u64) hash * map->len) >> 32];
tcpu = map->cpus[reciprocal_scale(hash, map->len)];
if (cpu_online(tcpu)) {
cpu = tcpu;
goto done;