37 void ewma_init(struct ewma *avg, unsigned long factor, unsigned long weight)  in ewma_init()  argument
41 	avg->weight = ilog2(weight);  in ewma_init()
42 	avg->factor = ilog2(factor);  in ewma_init()
43 	avg->internal = 0;  in ewma_init()
54 struct ewma *ewma_add(struct ewma *avg, unsigned long val)  in ewma_add()  argument
56 	unsigned long internal = ACCESS_ONCE(avg->internal);  in ewma_add()
58 	ACCESS_ONCE(avg->internal) = internal ?  in ewma_add()
59 		(((internal << avg->weight) - internal) +  in ewma_add()
60 			(val << avg->factor)) >> avg->weight :  in ewma_add()
61 		(val << avg->factor);  in ewma_add()
62 	return avg;  in ewma_add()