diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-05-25 11:46:46 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-05-27 11:55:02 +0200 |
| commit | bccaadab5c17ae20077bd93c44e2005b505791ba (patch) | |
| tree | 7f7313f270f2c5aa536b4ab8ffd1d5ddcc49c23b | |
| parent | c1a957d17086d20d52d7f9c8dffaeac2ee09d6f9 (diff) | |
| download | linux-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.c | 18 |
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; } |