aboutsummaryrefslogtreecommitdiff
path: root/drivers/cpuidle/cpuidle.c
diff options
context:
space:
mode:
authorColin Cross <ccross@android.com>2012-05-07 17:57:39 -0700
committerLen Brown <len.brown@intel.com>2012-06-02 00:48:31 -0400
commit56cfbf74a17c40f3a741398103c9f5d5a6806715 (patch)
tree80adac252b5c485df28f3469e314a66d562a5d4c /drivers/cpuidle/cpuidle.c
parent76e10d158efb6d4516018846f60c2ab5501900bc (diff)
downloadlinux-linaro-stable-56cfbf74a17c40f3a741398103c9f5d5a6806715.tar.gz
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> Signed-off-by: Colin Cross <ccross@android.com> Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/cpuidle/cpuidle.c')
-rw-r--r--drivers/cpuidle/cpuidle.c42
1 files changed, 29 insertions, 13 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 2f0083a51a9a..3e3e3e4d9581 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -103,6 +103,34 @@ 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
@@ -143,23 +171,11 @@ 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);