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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-01 00:13:47 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-01 00:13:47 +0200
commit52c324f8a87b336496d0f5e9d8dff1aa32bb08cd (patch)
tree5d359e67396365456f73496344e57bd2976d1c8c /kernel
parentd1db0eea852497762cab43b905b879dfcd3b8987 (diff)
downloadop-kernel-dev-52c324f8a87b336496d0f5e9d8dff1aa32bb08cd.zip
op-kernel-dev-52c324f8a87b336496d0f5e9d8dff1aa32bb08cd.tar.gz
cpuidle: Combine cpuidle_enabled() with cpuidle_select()
Since both cpuidle_enabled() and cpuidle_select() are only called by cpuidle_idle_call(), it is not really useful to keep them separate and combining them will help to avoid complicating cpuidle_idle_call() even further if governors are changed to return error codes sometimes. This code modification shouldn't lead to any functional changes. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched/idle.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 8f4390a..a8f1224 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -101,19 +101,13 @@ static int cpuidle_idle_call(void)
rcu_idle_enter();
/*
- * Check if the cpuidle framework is ready, otherwise fallback
- * to the default arch specific idle method
+ * Ask the cpuidle framework to choose a convenient idle state.
+ * Fall back to the default arch specific idle method on errors.
*/
- ret = cpuidle_enabled(drv, dev);
-
- if (!ret) {
- /*
- * Ask the governor to choose an idle state it thinks
- * it is convenient to go to. There is *always* a
- * convenient idle state
- */
- next_state = cpuidle_select(drv, dev);
+ next_state = cpuidle_select(drv, dev);
+ ret = next_state;
+ if (ret >= 0) {
/*
* The idle task must be scheduled, it is pointless to
* go to idle, just update no idle residency and get
@@ -140,7 +134,7 @@ static int cpuidle_idle_call(void)
CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
&dev->cpu);
- if (!ret) {
+ if (ret >= 0) {
trace_cpu_idle_rcuidle(next_state, dev->cpu);
/*
@@ -175,7 +169,7 @@ static int cpuidle_idle_call(void)
* We can't use the cpuidle framework, let's use the default
* idle routine
*/
- if (ret)
+ if (ret < 0)
arch_cpu_idle();
__current_set_polling();
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