diff options
author | Colin Cross <ccross@android.com> | 2012-03-14 11:29:50 -0700 |
---|---|---|
committer | Viresh Kumar <viresh.kumar@linaro.org> | 2012-07-25 10:02:47 +0100 |
commit | 5506fcd779609e3c03c4ad7fff36c5dcd0cdc686 (patch) | |
tree | 88713d92059f49afbd84d1af9385d5030889b886 | |
parent | 28a33cbc24e4256c143dce96c7d93bf423229f92 (diff) |
cpuidle: refactor out cpuidle_enter_state
Split the code to enter a state and update the stats into a helper
function, cpuidle_enter_state, and export it. This function will
be called by the coupled state code to handle entering the safe
state and the final coupled state.
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
-rw-r--r-- | drivers/cpuidle/cpuidle.c | 42 | ||||
-rw-r--r-- | drivers/cpuidle/cpuidle.h | 2 |
2 files changed, 31 insertions, 13 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index d90519cec880..cd266101c80e 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -92,6 +92,34 @@ int cpuidle_play_dead(void) } /** + * cpuidle_enter_state - enter the state and update stats + * @dev: cpuidle device for this cpu + * @drv: cpuidle driver for this cpu + * @next_state: index into drv->states of the state to enter + */ +int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv, + int next_state) +{ + int entered_state; + + entered_state = cpuidle_enter_ops(dev, drv, next_state); + + if (entered_state >= 0) { + /* Update cpuidle counters */ + /* This can be moved to within driver enter routine + * but that results in multiple copies of same code. + */ + dev->states_usage[entered_state].time += + (unsigned long long)dev->last_residency; + dev->states_usage[entered_state].usage++; + } else { + dev->last_residency = 0; + } + + return entered_state; +} + +/** * cpuidle_idle_call - the main idle loop * * NOTE: no locks or semaphores should be used here @@ -132,23 +160,11 @@ int cpuidle_idle_call(void) trace_power_start_rcuidle(POWER_CSTATE, next_state, dev->cpu); trace_cpu_idle_rcuidle(next_state, dev->cpu); - entered_state = cpuidle_enter_ops(dev, drv, next_state); + entered_state = cpuidle_enter_state(dev, drv, next_state); trace_power_end_rcuidle(dev->cpu); trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu); - if (entered_state >= 0) { - /* Update cpuidle counters */ - /* This can be moved to within driver enter routine - * but that results in multiple copies of same code. - */ - dev->states_usage[entered_state].time += - (unsigned long long)dev->last_residency; - dev->states_usage[entered_state].usage++; - } else { - dev->last_residency = 0; - } - /* give the governor an opportunity to reflect on the outcome */ if (cpuidle_curr_governor->reflect) cpuidle_curr_governor->reflect(dev, entered_state); diff --git a/drivers/cpuidle/cpuidle.h b/drivers/cpuidle/cpuidle.h index 7db186685c27..d8a3ccce8281 100644 --- a/drivers/cpuidle/cpuidle.h +++ b/drivers/cpuidle/cpuidle.h @@ -14,6 +14,8 @@ extern struct list_head cpuidle_detected_devices; extern struct mutex cpuidle_lock; extern spinlock_t cpuidle_driver_lock; extern int cpuidle_disabled(void); +extern int cpuidle_enter_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int next_state); /* idle loop */ extern void cpuidle_install_idle_handler(void); |