3 Commits (f8bfe2b050f3ce266427486a052d010c53241ce4)

Author	SHA1	Message	Date
Paul Gortmaker	8bc3bcc93a	lib: reduce the use of module.h wherever possible ... For files only using THIS_MODULE and/or EXPORT_SYMBOL, map them onto including export.h -- or if the file isn't even using those, then just delete the include. Fix up any implicit include dependencies that were being masked by module.h along the way. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>	2012-03-07 15:04:04 -05:00
Bruno Randolf	af55688435	lib: Improve EWMA efficiency by using bitshifts ... Using bitshifts instead of division and multiplication should improve performance. That requires weight and factor to be powers of two, but i think this is something we can live with. Thanks to Peter Zijlstra for the improved formula! Signed-off-by: Bruno Randolf <br1@einfach.org> -- v2: use log2.h functions Signed-off-by: John W. Linville <linville@tuxdriver.com>	2010-12-06 15:58:43 -05:00
Bruno Randolf	c5485a7e75	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>	2010-11-18 14:21:52 -05:00