freq_to_perf
perf.lowest_perf = freq_to_perf(perf, nominal_freq, min_freq);
floor_perf = freq_to_perf(perf, cpudata->nominal_freq, freq);
cached_floor_perf = freq_to_perf(perf, cpudata->nominal_freq, cpudata->floor_freq);
int cur_perf = freq_to_perf(perf, cpudata->nominal_freq, policy->cur);
cached_floor_perf = freq_to_perf(perf, cpudata->nominal_freq, cpudata->floor_freq);
cached_floor_perf = freq_to_perf(perf, cpudata->nominal_freq, cpudata->floor_freq);
perf.max_limit_perf = freq_to_perf(perf, cpudata->nominal_freq, policy->max);
perf.min_limit_perf = freq_to_perf(perf, cpudata->nominal_freq, policy->min);
des_perf = freq_to_perf(perf, cpudata->nominal_freq, target_freq);