diff options
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/governors/menu.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index 9f3d77532ab9..68104434ebb5 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -96,6 +96,7 @@ struct menu_device { int last_state_idx; + int needs_update; unsigned int expected_us; u64 predicted_us; @@ -166,6 +167,8 @@ static inline int performance_multiplier(void) static DEFINE_PER_CPU(struct menu_device, menu_devices); +static void menu_update(struct cpuidle_device *dev); + /** * menu_select - selects the next idle state to enter * @dev: the CPU @@ -180,6 +183,11 @@ static int menu_select(struct cpuidle_device *dev) data->last_state_idx = 0; data->exit_us = 0; + if (data->needs_update) { + menu_update(dev); + data->needs_update = 0; + } + /* Special case when user has set very strict latency requirement */ if (unlikely(latency_req == 0)) return 0; @@ -231,7 +239,7 @@ static int menu_select(struct cpuidle_device *dev) } /** - * menu_reflect - attempts to guess what happened after entry + * menu_reflect - records that data structures need update * @dev: the CPU * * NOTE: it's important to be fast here because this operation will add to @@ -240,6 +248,16 @@ static int menu_select(struct cpuidle_device *dev) static void menu_reflect(struct cpuidle_device *dev) { struct menu_device *data = &__get_cpu_var(menu_devices); + data->needs_update = 1; +} + +/** + * menu_update - attempts to guess what happened after entry + * @dev: the CPU + */ +static void menu_update(struct cpuidle_device *dev) +{ + struct menu_device *data = &__get_cpu_var(menu_devices); int last_idx = data->last_state_idx; unsigned int last_idle_us = cpuidle_get_last_residency(dev); struct cpuidle_state *target = &dev->states[last_idx]; |