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#ifndef _LINUX_AVERAGE_H
#define _LINUX_AVERAGE_H
#include <linux/kernel.h>
/* Exponentially weighted moving average (EWMA) */
/* For more documentation see lib/average.c */
struct ewma {
unsigned long internal;
unsigned long factor;
unsigned long weight;
};
extern void ewma_init(struct ewma *avg, unsigned long factor,
unsigned long weight);
extern struct ewma *ewma_add(struct ewma *avg, unsigned long val);
/**
* ewma_read() - Get average value
* @avg: Average structure
*
* Returns the average value held in @avg.
*/
static inline unsigned long ewma_read(const struct ewma *avg)
{
return DIV_ROUND_CLOSEST(avg->internal, avg->factor);
}
#endif /* _LINUX_AVERAGE_H */
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