1 #ifndef _LINUX_AVERAGE_H
2 #define _LINUX_AVERAGE_H
4 #include <linux/kernel.h>
6 /* Exponentially weighted moving average (EWMA) */
8 /* For more documentation see lib/average.c */
11 unsigned long internal;
16 extern void ewma_init(struct ewma *avg, unsigned long factor,
17 unsigned long weight);
19 extern struct ewma *ewma_add(struct ewma *avg, unsigned long val);
22 * ewma_read() - Get average value
23 * @avg: Average structure
25 * Returns the average value held in @avg.
27 static inline unsigned long ewma_read(const struct ewma *avg)
29 return DIV_ROUND_CLOSEST(avg->internal, avg->factor);
32 #endif /* _LINUX_AVERAGE_H */