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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-05-25 11:46:46 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-05-27 11:55:02 +0200
commitbccaadab5c17ae20077bd93c44e2005b505791ba (patch)
tree7f7313f270f2c5aa536b4ab8ffd1d5ddcc49c23b
parentc1a957d17086d20d52d7f9c8dffaeac2ee09d6f9 (diff)
downloadlinux-bccaadab5c17ae20077bd93c44e2005b505791ba.tar.bz2
PM / wakeup: Make events_lock a RAW_SPINLOCK
The `events_lock' is acquired during suspend while interrupts are disabled even on RT. The lock is taken only for a very brief moment. Make it a RAW lock which avoids "sleeping while atomic" warnings on RT. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/base/power/wakeup.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index ea01621ed769..2e76fbcba76e 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -57,7 +57,7 @@ static void split_counters(unsigned int *cnt, unsigned int *inpr)
/* A preserved old value of the events counter. */
static unsigned int saved_count;
-static DEFINE_SPINLOCK(events_lock);
+static DEFINE_RAW_SPINLOCK(events_lock);
static void pm_wakeup_timer_fn(struct timer_list *t);
@@ -185,9 +185,9 @@ void wakeup_source_add(struct wakeup_source *ws)
ws->active = false;
ws->last_time = ktime_get();
- spin_lock_irqsave(&events_lock, flags);
+ raw_spin_lock_irqsave(&events_lock, flags);
list_add_rcu(&ws->entry, &wakeup_sources);
- spin_unlock_irqrestore(&events_lock, flags);
+ raw_spin_unlock_irqrestore(&events_lock, flags);
}
EXPORT_SYMBOL_GPL(wakeup_source_add);
@@ -202,9 +202,9 @@ void wakeup_source_remove(struct wakeup_source *ws)
if (WARN_ON(!ws))
return;
- spin_lock_irqsave(&events_lock, flags);
+ raw_spin_lock_irqsave(&events_lock, flags);
list_del_rcu(&ws->entry);
- spin_unlock_irqrestore(&events_lock, flags);
+ raw_spin_unlock_irqrestore(&events_lock, flags);
synchronize_srcu(&wakeup_srcu);
}
EXPORT_SYMBOL_GPL(wakeup_source_remove);
@@ -843,7 +843,7 @@ bool pm_wakeup_pending(void)
unsigned long flags;
bool ret = false;
- spin_lock_irqsave(&events_lock, flags);
+ raw_spin_lock_irqsave(&events_lock, flags);
if (events_check_enabled) {
unsigned int cnt, inpr;
@@ -851,7 +851,7 @@ bool pm_wakeup_pending(void)
ret = (cnt != saved_count || inpr > 0);
events_check_enabled = !ret;
}
- spin_unlock_irqrestore(&events_lock, flags);
+ raw_spin_unlock_irqrestore(&events_lock, flags);
if (ret) {
pr_info("PM: Wakeup pending, aborting suspend\n");
@@ -940,13 +940,13 @@ bool pm_save_wakeup_count(unsigned int count)
unsigned long flags;
events_check_enabled = false;
- spin_lock_irqsave(&events_lock, flags);
+ raw_spin_lock_irqsave(&events_lock, flags);
split_counters(&cnt, &inpr);
if (cnt == count && inpr == 0) {
saved_count = count;
events_check_enabled = true;
}
- spin_unlock_irqrestore(&events_lock, flags);
+ raw_spin_unlock_irqrestore(&events_lock, flags);
return events_check_enabled;
}