Commit 3a6e55cb authored by Thomas Gleixner's avatar Thomas Gleixner

clockevents: Convert clockevents / tick device locks to atomic_spinlock

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 4b064e4f
......@@ -28,7 +28,7 @@ static LIST_HEAD(clockevents_released);
static RAW_NOTIFIER_HEAD(clockevents_chain);
/* Protection for the above */
static DEFINE_SPINLOCK(clockevents_lock);
static DEFINE_ATOMIC_SPINLOCK(clockevents_lock);
/**
* clockevents_delta2ns - Convert a latch value (device ticks) to nanoseconds
......@@ -139,9 +139,9 @@ int clockevents_register_notifier(struct notifier_block *nb)
{
int ret;
spin_lock(&clockevents_lock);
atomic_spin_lock(&clockevents_lock);
ret = raw_notifier_chain_register(&clockevents_chain, nb);
spin_unlock(&clockevents_lock);
atomic_spin_unlock(&clockevents_lock);
return ret;
}
......@@ -181,13 +181,13 @@ void clockevents_register_device(struct clock_event_device *dev)
BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED);
BUG_ON(!dev->cpumask);
spin_lock(&clockevents_lock);
atomic_spin_lock(&clockevents_lock);
list_add(&dev->list, &clockevent_devices);
clockevents_do_notify(CLOCK_EVT_NOTIFY_ADD, dev);
clockevents_notify_released();
spin_unlock(&clockevents_lock);
atomic_spin_unlock(&clockevents_lock);
}
EXPORT_SYMBOL_GPL(clockevents_register_device);
......@@ -236,7 +236,7 @@ void clockevents_notify(unsigned long reason, void *arg)
{
struct list_head *node, *tmp;
spin_lock(&clockevents_lock);
atomic_spin_lock(&clockevents_lock);
clockevents_do_notify(reason, arg);
switch (reason) {
......@@ -251,7 +251,7 @@ void clockevents_notify(unsigned long reason, void *arg)
default:
break;
}
spin_unlock(&clockevents_lock);
atomic_spin_unlock(&clockevents_lock);
}
EXPORT_SYMBOL_GPL(clockevents_notify);
#endif
......@@ -31,7 +31,7 @@ static struct tick_device tick_broadcast_device;
/* FIXME: Use cpumask_var_t. */
static DECLARE_BITMAP(tick_broadcast_mask, NR_CPUS);
static DECLARE_BITMAP(tmpmask, NR_CPUS);
static DEFINE_SPINLOCK(tick_broadcast_lock);
static DEFINE_ATOMIC_SPINLOCK(tick_broadcast_lock);
static int tick_broadcast_force;
#ifdef CONFIG_TICK_ONESHOT
......@@ -96,7 +96,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
/*
* Devices might be registered with both periodic and oneshot
......@@ -122,7 +122,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
tick_broadcast_clear_oneshot(cpu);
}
}
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
return ret;
}
......@@ -161,13 +161,13 @@ static void tick_do_broadcast(struct cpumask *mask)
*/
static void tick_do_periodic_broadcast(void)
{
spin_lock(&tick_broadcast_lock);
atomic_spin_lock(&tick_broadcast_lock);
cpumask_and(to_cpumask(tmpmask),
cpu_online_mask, tick_get_broadcast_mask());
tick_do_broadcast(to_cpumask(tmpmask));
spin_unlock(&tick_broadcast_lock);
atomic_spin_unlock(&tick_broadcast_lock);
}
/*
......@@ -212,7 +212,7 @@ static void tick_do_broadcast_on_off(void *why)
unsigned long flags, *reason = why;
int cpu, bc_stopped;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
cpu = smp_processor_id();
td = &per_cpu(tick_cpu_device, cpu);
......@@ -263,7 +263,7 @@ static void tick_do_broadcast_on_off(void *why)
tick_broadcast_setup_oneshot(bc);
}
out:
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
/*
......@@ -300,7 +300,7 @@ void tick_shutdown_broadcast(unsigned int *cpup)
unsigned long flags;
unsigned int cpu = *cpup;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
bc = tick_broadcast_device.evtdev;
cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
......@@ -310,7 +310,7 @@ void tick_shutdown_broadcast(unsigned int *cpup)
clockevents_shutdown(bc);
}
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
void tick_suspend_broadcast(void)
......@@ -318,13 +318,13 @@ void tick_suspend_broadcast(void)
struct clock_event_device *bc;
unsigned long flags;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
bc = tick_broadcast_device.evtdev;
if (bc)
clockevents_shutdown(bc);
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
int tick_resume_broadcast(void)
......@@ -333,7 +333,7 @@ int tick_resume_broadcast(void)
unsigned long flags;
int broadcast = 0;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
bc = tick_broadcast_device.evtdev;
......@@ -352,7 +352,7 @@ int tick_resume_broadcast(void)
break;
}
}
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
return broadcast;
}
......@@ -406,7 +406,7 @@ static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
ktime_t now, next_event;
int cpu;
spin_lock(&tick_broadcast_lock);
atomic_spin_lock(&tick_broadcast_lock);
again:
dev->next_event.tv64 = KTIME_MAX;
next_event.tv64 = KTIME_MAX;
......@@ -444,7 +444,7 @@ again:
if (tick_broadcast_set_event(next_event, 0))
goto again;
}
spin_unlock(&tick_broadcast_lock);
atomic_spin_unlock(&tick_broadcast_lock);
}
/*
......@@ -458,7 +458,7 @@ void tick_broadcast_oneshot_control(unsigned long reason)
unsigned long flags;
int cpu;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
/*
* Periodic mode does not care about the enter/exit of power
......@@ -493,7 +493,7 @@ void tick_broadcast_oneshot_control(unsigned long reason)
}
out:
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
/*
......@@ -564,13 +564,13 @@ void tick_broadcast_switch_to_oneshot(void)
struct clock_event_device *bc;
unsigned long flags;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
tick_broadcast_device.mode = TICKDEV_MODE_ONESHOT;
bc = tick_broadcast_device.evtdev;
if (bc)
tick_broadcast_setup_oneshot(bc);
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
......@@ -582,7 +582,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
unsigned long flags;
unsigned int cpu = *cpup;
spin_lock_irqsave(&tick_broadcast_lock, flags);
atomic_spin_lock_irqsave(&tick_broadcast_lock, flags);
/*
* Clear the broadcast mask flag for the dead cpu, but do not
......@@ -590,7 +590,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
*/
cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
atomic_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
/*
......
......@@ -34,7 +34,7 @@ DEFINE_PER_CPU(struct tick_device, tick_cpu_device);
ktime_t tick_next_period;
ktime_t tick_period;
int tick_do_timer_cpu __read_mostly = TICK_DO_TIMER_BOOT;
DEFINE_SPINLOCK(tick_device_lock);
DEFINE_ATOMIC_SPINLOCK(tick_device_lock);
/*
* Debugging: see timer_list.c
......@@ -209,7 +209,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
int cpu, ret = NOTIFY_OK;
unsigned long flags;
spin_lock_irqsave(&tick_device_lock, flags);
atomic_spin_lock_irqsave(&tick_device_lock, flags);
cpu = smp_processor_id();
if (!cpumask_test_cpu(cpu, newdev->cpumask))
......@@ -268,7 +268,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
if (newdev->features & CLOCK_EVT_FEAT_ONESHOT)
tick_oneshot_notify();
spin_unlock_irqrestore(&tick_device_lock, flags);
atomic_spin_unlock_irqrestore(&tick_device_lock, flags);
return NOTIFY_STOP;
out_bc:
......@@ -278,7 +278,7 @@ out_bc:
if (tick_check_broadcast_device(newdev))
ret = NOTIFY_STOP;
spin_unlock_irqrestore(&tick_device_lock, flags);
atomic_spin_unlock_irqrestore(&tick_device_lock, flags);
return ret;
}
......@@ -311,7 +311,7 @@ static void tick_shutdown(unsigned int *cpup)
struct clock_event_device *dev = td->evtdev;
unsigned long flags;
spin_lock_irqsave(&tick_device_lock, flags);
atomic_spin_lock_irqsave(&tick_device_lock, flags);
td->mode = TICKDEV_MODE_PERIODIC;
if (dev) {
/*
......@@ -322,7 +322,7 @@ static void tick_shutdown(unsigned int *cpup)
clockevents_exchange_device(dev, NULL);
td->evtdev = NULL;
}
spin_unlock_irqrestore(&tick_device_lock, flags);
atomic_spin_unlock_irqrestore(&tick_device_lock, flags);
}
static void tick_suspend(void)
......@@ -330,9 +330,9 @@ static void tick_suspend(void)
struct tick_device *td = &__get_cpu_var(tick_cpu_device);
unsigned long flags;
spin_lock_irqsave(&tick_device_lock, flags);
atomic_spin_lock_irqsave(&tick_device_lock, flags);
clockevents_shutdown(td->evtdev);
spin_unlock_irqrestore(&tick_device_lock, flags);
atomic_spin_unlock_irqrestore(&tick_device_lock, flags);
}
static void tick_resume(void)
......@@ -341,7 +341,7 @@ static void tick_resume(void)
unsigned long flags;
int broadcast = tick_resume_broadcast();
spin_lock_irqsave(&tick_device_lock, flags);
atomic_spin_lock_irqsave(&tick_device_lock, flags);
clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_RESUME);
if (!broadcast) {
......@@ -350,7 +350,7 @@ static void tick_resume(void)
else
tick_resume_oneshot();
}
spin_unlock_irqrestore(&tick_device_lock, flags);
atomic_spin_unlock_irqrestore(&tick_device_lock, flags);
}
/*
......
......@@ -6,7 +6,7 @@
#define TICK_DO_TIMER_BOOT -2
DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
extern spinlock_t tick_device_lock;
extern atomic_spinlock_t tick_device_lock;
extern ktime_t tick_next_period;
extern ktime_t tick_period;
extern int tick_do_timer_cpu __read_mostly;
......
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