tree 928a8556deaec0811d1b83102b33365aab28a270
parent 50a9432daeece6fc1309bef1dc0a7b8fde8204cb
author Bruno Randolf <br1@einfach.org> 1289872717 +0900
committer John W. Linville <linville@tuxdriver.com> 1290108112 -0500

lib: Add generic exponentially weighted moving average (EWMA) function

This adds generic functions for calculating Exponentially Weighted Moving
Averages (EWMA). This implementation makes use of a structure which keeps the
EWMA parameters and a scaled up internal representation to reduce rounding
errors.

The original idea for this implementation came from the rt2x00 driver
(rt2x00link.c). I would like to use it in several places in the mac80211 and
ath5k code and I hope it can be useful in many other places in the kernel code.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>