[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / average.h

#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 */
Commit	Line	Data
c5485a7e BR	1	#ifndef _LINUX_AVERAGE_H
	2	#define _LINUX_AVERAGE_H
	3
c5485a7e BR	4	/* Exponentially weighted moving average (EWMA) */
	5
	6	/* For more documentation see lib/average.c */
	7
	8	struct ewma {
	9	unsigned long internal;
	10	unsigned long factor;
	11	unsigned long weight;
	12	};
	13
	14	extern void ewma_init(struct ewma *avg, unsigned long factor,
	15	unsigned long weight);
	16
	17	extern struct ewma ewma_add(struct ewma avg, unsigned long val);
	18
	19	/**
	20	* ewma_read() - Get average value
	21	* @avg: Average structure
	22	*
	23	* Returns the average value held in @avg.
	24	*/
	25	static inline unsigned long ewma_read(const struct ewma *avg)
	26	{
af556884	27	return avg->internal >> avg->factor;
c5485a7e BR	28	}
	29
	30	#endif /* _LINUX_AVERAGE_H */