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| author |   Daniel Borkmann <dborkman@redhat.com> | 2014-08-23 20:58:54 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-08-23 12:21:21 -0700 |
| commit | 8fc54f68919298ff9689d980efb495707ef43f30 (patch) | |
| tree | c8a0c89621a9e670be02764a357bb6e73ed7ab6c /net/core/flow_dissector.c | |
| parent | net: Allow raw buffers to be passed into the flow dissector. (diff) | |
| download | linux-dev-8fc54f68919298ff9689d980efb495707ef43f30.tar.xz linux-dev-8fc54f68919298ff9689d980efb495707ef43f30.zip | |
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>
Diffstat (limited to 'net/core/flow_dissector.c')
| -rw-r--r-- | net/core/flow_dissector.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 660c6492fb78..8ffcc97871c8 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -298,7 +298,7 @@ u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb, qcount = dev->tc_to_txq[tc].count; } - return (u16) (((u64)skb_get_hash(skb) * qcount) >> 32) + qoffset; + return (u16) reciprocal_scale(skb_get_hash(skb), qcount) + qoffset; } EXPORT_SYMBOL(__skb_tx_hash); @@ -371,9 +371,8 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb) if (map->len == 1) queue_index = map->queues[0]; else - queue_index = map->queues[ - ((u64)skb_get_hash(skb) * map->len) >> 32]; - + queue_index = map->queues[reciprocal_scale(skb_get_hash(skb), + map->len)]; if (unlikely(queue_index >= dev->real_num_tx_queues)) queue_index = -1; } |