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authorBruno Randolf <br1@einfach.org>2010-11-16 02:58:37 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-11-18 20:21:52 +0100
commitc5485a7e7569ab32eea240c850198519e2a765ef (patch)
tree928a8556deaec0811d1b83102b33365aab28a270 /net
parentmac80211: fix powersaving clients races (diff)
downloadlinux-c5485a7e7569ab32eea240c850198519e2a765ef.tar.xz
linux-c5485a7e7569ab32eea240c850198519e2a765ef.zip
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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