From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 18 Nov 2010 22:04:46 +0000 (+0000)
Subject: filter: use reciprocal divide
X-Git-Url: https://bbs.cooldavid.org/git/?a=commitdiff_plain;h=c26aed40f4fd18f86bcc6aba557cab700b129b73;hp=c26aed40f4fd18f86bcc6aba557cab700b129b73;p=net-next-2.6.git

filter: use reciprocal divide

At compile time, we can replace the DIV_K instruction (divide by a
constant value) by a reciprocal divide.

At exec time, the expensive divide is replaced by a multiply, a less
expensive operation on most processors.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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