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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-05-25 11:46:47 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-05-27 11:55:02 +0200
commit9c8cd6b62f39658e5f5db08fcead686905b85ff9 (patch)
tree8bbd92d645455f3199f19574bea7b21a98ea82db /kernel/power
parentbccaadab5c17ae20077bd93c44e2005b505791ba (diff)
downloadlinux-9c8cd6b62f39658e5f5db08fcead686905b85ff9.tar.bz2
PM / s2idle: Make s2idle_wait_head swait based
s2idle_wait_head is used during s2idle with interrupts disabled even on RT. There is no "custom" wake up function so swait could be used instead which is also lower weight compared to the wait_queue. Make s2idle_wait_head a swait_queue_head. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/suspend.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 5149c77506b3..1020f597ff14 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -27,6 +27,7 @@
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
+#include <linux/swait.h>
#include <linux/ftrace.h>
#include <trace/events/power.h>
#include <linux/compiler.h>
@@ -57,7 +58,7 @@ EXPORT_SYMBOL_GPL(pm_suspend_global_flags);
static const struct platform_suspend_ops *suspend_ops;
static const struct platform_s2idle_ops *s2idle_ops;
-static DECLARE_WAIT_QUEUE_HEAD(s2idle_wait_head);
+static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
enum s2idle_states __read_mostly s2idle_state;
static DEFINE_SPINLOCK(s2idle_lock);
@@ -91,8 +92,8 @@ static void s2idle_enter(void)
/* Push all the CPUs into the idle loop. */
wake_up_all_idle_cpus();
/* Make the current CPU wait so it can enter the idle loop too. */
- wait_event(s2idle_wait_head,
- s2idle_state == S2IDLE_STATE_WAKE);
+ swait_event(s2idle_wait_head,
+ s2idle_state == S2IDLE_STATE_WAKE);
cpuidle_pause();
put_online_cpus();
@@ -159,7 +160,7 @@ void s2idle_wake(void)
spin_lock_irqsave(&s2idle_lock, flags);
if (s2idle_state > S2IDLE_STATE_NONE) {
s2idle_state = S2IDLE_STATE_WAKE;
- wake_up(&s2idle_wait_head);
+ swake_up(&s2idle_wait_head);
}
spin_unlock_irqrestore(&s2idle_lock, flags);
}