diff options
Diffstat (limited to 'kernel/power/energy_model.c')
| -rw-r--r-- | kernel/power/energy_model.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index b192b0ac8c6e..a631d7d52c40 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -192,11 +192,9 @@ static int em_compute_costs(struct device *dev, struct em_perf_state *table, unsigned long flags) { unsigned long prev_cost = ULONG_MAX; - u64 fmax; int i, ret; /* Compute the cost of each performance state. */ - fmax = (u64) table[nr_states - 1].frequency; for (i = nr_states - 1; i >= 0; i--) { unsigned long power_res, cost; @@ -208,8 +206,9 @@ static int em_compute_costs(struct device *dev, struct em_perf_state *table, return -EINVAL; } } else { - power_res = table[i].power; - cost = div64_u64(fmax * power_res, table[i].frequency); + /* increase resolution of 'cost' precision */ + power_res = table[i].power * 10; + cost = power_res / table[i].performance; } table[i].cost = cost; |