root/include/linux/average.h

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DEFINITIONS

This source file includes following definitions.
  1. ewma_read
#ifndef _LINUX_AVERAGE_H
#define _LINUX_AVERAGE_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 avg->internal >> avg->factor;
}

#endif /* _LINUX_AVERAGE_H */
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