UCLAMP_BUCKETS
unsigned int bucket_id : bits_per(UCLAMP_BUCKETS);
int bucket_id = UCLAMP_BUCKETS - 1;
struct uclamp_bucket bucket[UCLAMP_BUCKETS];
#define UCLAMP_BUCKET_DELTA DIV_ROUND_CLOSEST(SCHED_CAPACITY_SCALE, UCLAMP_BUCKETS)
return min_t(unsigned int, clamp_value / UCLAMP_BUCKET_DELTA, UCLAMP_BUCKETS - 1);