From: Bruno Randolf <br1@einfach.org>
Date: Tue, 16 Nov 2010 01:58:37 +0000 (+0900)
Subject: lib: Add generic exponentially weighted moving average (EWMA) function
X-Git-Tag: v2.6.38-rc1~476^2~405^2^2~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5485a7e7569ab32eea240c850198519e2a765ef;p=pandora-kernel.git

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>
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