clockevents: Use helpers to check the state of a clockevent device

Use accessor functions to check the state of clockevent devices in
core code.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linaro-kernel@lists.linaro.org
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/fa2b9869fd17f210eaa156ec2b594efd0230b6c7.1432192527.git.viresh.kumar@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/time/clockevents.c

@@ -136,7 +136,7 @@ static int __clockevents_set_state(struct clock_event_device *dev,
 
 	case CLOCK_EVT_STATE_ONESHOT_STOPPED:
 		/* Core internal bug */
-		if (WARN_ONCE(dev->state != CLOCK_EVT_STATE_ONESHOT,
+		if (WARN_ONCE(!clockevent_state_oneshot(dev),
 			      "Current state: %d\n", dev->state))
 			return -EINVAL;
 
@@ -170,7 +170,7 @@ void clockevents_set_state(struct clock_event_device *dev,
 		 * A nsec2cyc multiplicator of 0 is invalid and we'd crash
 		 * on it, so fix it up and emit a warning:
 		 */
-		if (state == CLOCK_EVT_STATE_ONESHOT) {
+		if (clockevent_state_oneshot(dev)) {
 			if (unlikely(!dev->mult)) {
 				dev->mult = 1;
 				WARN_ON(1);
@@ -259,7 +259,7 @@ static int clockevents_program_min_delta(struct clock_event_device *dev)
 		delta = dev->min_delta_ns;
 		dev->next_event = ktime_add_ns(ktime_get(), delta);
 
-		if (dev->state == CLOCK_EVT_STATE_SHUTDOWN)
+		if (clockevent_state_shutdown(dev))
 			return 0;
 
 		dev->retries++;
@@ -296,7 +296,7 @@ static int clockevents_program_min_delta(struct clock_event_device *dev)
 	delta = dev->min_delta_ns;
 	dev->next_event = ktime_add_ns(ktime_get(), delta);
 
-	if (dev->state == CLOCK_EVT_STATE_SHUTDOWN)
+	if (clockevent_state_shutdown(dev))
 		return 0;
 
 	dev->retries++;
@@ -328,11 +328,11 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires,
 
 	dev->next_event = expires;
 
-	if (dev->state == CLOCK_EVT_STATE_SHUTDOWN)
+	if (clockevent_state_shutdown(dev))
 		return 0;
 
 	/* We must be in ONESHOT state here */
-	WARN_ONCE(dev->state != CLOCK_EVT_STATE_ONESHOT, "Current state: %d\n",
+	WARN_ONCE(!clockevent_state_oneshot(dev), "Current state: %d\n",
 		  dev->state);
 
 	/* Shortcut for clockevent devices that can deal with ktime. */
@@ -377,7 +377,7 @@ static int clockevents_replace(struct clock_event_device *ced)
 	struct clock_event_device *dev, *newdev = NULL;
 
 	list_for_each_entry(dev, &clockevent_devices, list) {
-		if (dev == ced || dev->state != CLOCK_EVT_STATE_DETACHED)
+		if (dev == ced || !clockevent_state_detached(dev))
 			continue;
 
 		if (!tick_check_replacement(newdev, dev))
@@ -403,7 +403,7 @@ static int clockevents_replace(struct clock_event_device *ced)
 static int __clockevents_try_unbind(struct clock_event_device *ced, int cpu)
 {
 	/* Fast track. Device is unused */
-	if (ced->state == CLOCK_EVT_STATE_DETACHED) {
+	if (clockevent_state_detached(ced)) {
 		list_del_init(&ced->list);
 		return 0;
 	}
@@ -561,10 +561,10 @@ int __clockevents_update_freq(struct clock_event_device *dev, u32 freq)
 {
 	clockevents_config(dev, freq);
 
-	if (dev->state == CLOCK_EVT_STATE_ONESHOT)
+	if (clockevent_state_oneshot(dev))
 		return clockevents_program_event(dev, dev->next_event, false);
 
-	if (dev->state == CLOCK_EVT_STATE_PERIODIC)
+	if (clockevent_state_periodic(dev))
 		return __clockevents_set_state(dev, CLOCK_EVT_STATE_PERIODIC);
 
 	return 0;
@@ -625,7 +625,7 @@ void clockevents_exchange_device(struct clock_event_device *old,
 	}
 
 	if (new) {
-		BUG_ON(new->state != CLOCK_EVT_STATE_DETACHED);
+		BUG_ON(!clockevent_state_detached(new));
 		clockevents_shutdown(new);
 	}
 }
@@ -681,7 +681,7 @@ void tick_cleanup_dead_cpu(int cpu)
 		if (cpumask_test_cpu(cpu, dev->cpumask) &&
 		    cpumask_weight(dev->cpumask) == 1 &&
 		    !tick_is_broadcast_device(dev)) {
-			BUG_ON(dev->state != CLOCK_EVT_STATE_DETACHED);
+			BUG_ON(!clockevent_state_detached(dev));
 			list_del(&dev->list);
 		}
 	}

kernel/time/tick-broadcast.c

@@ -303,7 +303,7 @@ static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
 	raw_spin_lock(&tick_broadcast_lock);
 	bc_local = tick_do_periodic_broadcast();
 
-	if (dev->state == CLOCK_EVT_STATE_ONESHOT) {
+	if (clockevent_state_oneshot(dev)) {
 		ktime_t next = ktime_add(dev->next_event, tick_period);
 
 		clockevents_program_event(dev, next, true);
@@ -528,7 +528,7 @@ static void tick_broadcast_set_affinity(struct clock_event_device *bc,
 static void tick_broadcast_set_event(struct clock_event_device *bc, int cpu,
 				     ktime_t expires)
 {
-	if (bc->state != CLOCK_EVT_STATE_ONESHOT)
+	if (!clockevent_state_oneshot(bc))
 		clockevents_set_state(bc, CLOCK_EVT_STATE_ONESHOT);
 
 	clockevents_program_event(bc, expires, 1);
@@ -831,7 +831,7 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
 
 	/* Set it up only once ! */
 	if (bc->event_handler != tick_handle_oneshot_broadcast) {
-		int was_periodic = bc->state == CLOCK_EVT_STATE_PERIODIC;
+		int was_periodic = clockevent_state_periodic(bc);
 
 		bc->event_handler = tick_handle_oneshot_broadcast;
 

kernel/time/tick-common.c

@@ -112,7 +112,7 @@ void tick_handle_periodic(struct clock_event_device *dev)
 		return;
 #endif
 
-	if (dev->state != CLOCK_EVT_STATE_ONESHOT)
+	if (!clockevent_state_oneshot(dev))
 		return;
 	for (;;) {
 		/*

kernel/time/tick-oneshot.c

@@ -36,7 +36,7 @@ int tick_program_event(ktime_t expires, int force)
 		return 0;
 	}
 
-	if (unlikely(dev->state == CLOCK_EVT_STATE_ONESHOT_STOPPED)) {
+	if (unlikely(clockevent_state_oneshot_stopped(dev))) {
 		/*
 		 * We need the clock event again, configure it in ONESHOT mode
 		 * before using it.