| #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 */ |