These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / lib / average.c

diff --git a/kernel/lib/average.c b/kernel/lib/average.c
deleted file mode 100644 (file)
index 114d1be..0000000
--- a/kernel/lib/average.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * lib/average.c
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2.  See the file COPYING for more details.
- */
-
-#include <linux/export.h>
-#include <linux/average.h>
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/log2.h>
-
-/**
- * DOC: Exponentially Weighted Moving Average (EWMA)
- *
- * These are generic functions for calculating Exponentially Weighted Moving
- * Averages (EWMA). We keep a structure with the EWMA parameters and a scaled
- * up internal representation of the average value to prevent rounding errors.
- * The factor for scaling up and the exponential weight (or decay rate) have to
- * be specified thru the init fuction. The structure should not be accessed
- * directly but only thru the helper functions.
- */
-
-/**
- * ewma_init() - Initialize EWMA parameters
- * @avg: Average structure
- * @factor: Factor to use for the scaled up internal value. The maximum value
- *     of averages can be ULONG_MAX/(factor*weight). For performance reasons
- *     factor has to be a power of 2.
- * @weight: Exponential weight, or decay rate. This defines how fast the
- *     influence of older values decreases. For performance reasons weight has
- *     to be a power of 2.
- *
- * Initialize the EWMA parameters for a given struct ewma @avg.
- */
-void ewma_init(struct ewma *avg, unsigned long factor, unsigned long weight)
-{
-       WARN_ON(!is_power_of_2(weight) || !is_power_of_2(factor));
-
-       avg->weight = ilog2(weight);
-       avg->factor = ilog2(factor);
-       avg->internal = 0;
-}
-EXPORT_SYMBOL(ewma_init);
-
-/**
- * ewma_add() - Exponentially weighted moving average (EWMA)
- * @avg: Average structure
- * @val: Current value
- *
- * Add a sample to the average.
- */
-struct ewma *ewma_add(struct ewma *avg, unsigned long val)
-{
-       unsigned long internal = ACCESS_ONCE(avg->internal);
-
-       ACCESS_ONCE(avg->internal) = internal ?
-               (((internal << avg->weight) - internal) +
-                       (val << avg->factor)) >> avg->weight :
-               (val << avg->factor);
-       return avg;
-}
-EXPORT_SYMBOL(ewma_add);