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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-05-10 01:18:03 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-05-14 21:35:10 +0200
commitfaad38492814112e3e7ce94d90123bbe301fff33 (patch)
tree36f4bf459d2dfdda68a891228af94aebbf951c95 /drivers/cpuidle
parent7312280bd2ad9df1bcca236c5614091a0bd1504c (diff)
downloadlinux-faad38492814112e3e7ce94d90123bbe301fff33.tar.bz2
sched / idle: Call idle_set_state() from cpuidle_enter_state()
Introduce a wrapper function around idle_set_state() called sched_idle_set_state() that will pass this_rq() to it as the first argument and make cpuidle_enter_state() call the new function before and after entering the target state. At the same time, remove direct invocations of idle_set_state() from call_cpuidle(). This will allow the invocation of default_idle_call() to be moved from call_cpuidle() to cpuidle_enter_state() safely and call_cpuidle() to be simplified a bit as a result. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Kevin Hilman <khilman@linaro.org>
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/cpuidle.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 597f88443bdc..9306dd5f460e 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -170,6 +170,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
if (broadcast && tick_broadcast_enter())
return -EBUSY;
+ /* Take note of the planned idle state. */
+ sched_idle_set_state(target_state);
+
trace_cpu_idle_rcuidle(index, dev->cpu);
time_start = ktime_get();
@@ -178,6 +181,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
time_end = ktime_get();
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
+ /* The cpu is no longer idle or about to enter idle. */
+ sched_idle_set_state(NULL);
+
if (broadcast) {
if (WARN_ON_ONCE(!irqs_disabled()))
local_irq_disable();