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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-01-16 00:54:53 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-01-19 15:27:49 +0100
commit51164251f5c35e6596130ef0de94ffe65fe441e0 (patch)
tree914eeadf8095d4fad848451c7928c80ddb17166a /kernel
parent10475b34f4d71cf71cfe7c5d1f27d8ff3a4eb9bc (diff)
downloadlinux-51164251f5c35e6596130ef0de94ffe65fe441e0.tar.bz2
sched / idle: Drop default_idle_call() fallback from call_cpuidle()
After commit 9c4b2867ed7c (cpuidle: menu: Fix menu_select() for CPUIDLE_DRIVER_STATE_START == 0) it is clear that menu_select() cannot return negative values. Moreover, ladder_select_state() will never return a negative value too, so make find_deepest_state() return non-negative values too and drop the default_idle_call() fallback from call_cpuidle(). This eliminates one branch from the idle loop and makes the governors and find_deepest_state() handle the case when all states have been disabled from sysfs consistently. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@kernel.org> Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched/idle.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 4a2ef5a02fd3..34852ee70d54 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -97,12 +97,6 @@ void default_idle_call(void)
static int call_cpuidle(struct cpuidle_driver *drv, struct cpuidle_device *dev,
int next_state)
{
- /* Fall back to the default arch idle method on errors. */
- if (next_state < 0) {
- default_idle_call();
- return next_state;
- }
-
/*
* The idle task must be scheduled, it is pointless to go to idle, just
* update no idle residency and return.