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authorThomas Gleixner <tglx@linutronix.de>2009-11-17 16:36:54 +0100
committerThomas Gleixner <tglx@linutronix.de>2009-12-14 23:55:34 +0100
commitecb49d1a639acbacfc3771cae5ec07bed5df3847 (patch)
tree19c8fa91d1f9b1c965cd60653e16d1eb60cd9d3a /kernel/hrtimer.c
parent239007b8440abff689632f50cdf0f2b9e895b534 (diff)
downloadlinux-ecb49d1a639acbacfc3771cae5ec07bed5df3847.tar.gz
hrtimers: Convert to raw_spinlocks
Convert locks which cannot be sleeping locks in preempt-rt to raw_spinlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/hrtimer.c')
-rw-r--r--kernel/hrtimer.c50
1 files changed, 25 insertions, 25 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index d2f9239dc6b..0086628b6e9 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -127,11 +127,11 @@ struct hrtimer_clock_base *lock_hrtimer_base(const struct hrtimer *timer,
for (;;) {
base = timer->base;
if (likely(base != NULL)) {
- spin_lock_irqsave(&base->cpu_base->lock, *flags);
+ raw_spin_lock_irqsave(&base->cpu_base->lock, *flags);
if (likely(base == timer->base))
return base;
/* The timer has migrated to another CPU: */
- spin_unlock_irqrestore(&base->cpu_base->lock, *flags);
+ raw_spin_unlock_irqrestore(&base->cpu_base->lock, *flags);
}
cpu_relax();
}
@@ -208,13 +208,13 @@ again:
/* See the comment in lock_timer_base() */
timer->base = NULL;
- spin_unlock(&base->cpu_base->lock);
- spin_lock(&new_base->cpu_base->lock);
+ raw_spin_unlock(&base->cpu_base->lock);
+ raw_spin_lock(&new_base->cpu_base->lock);
if (cpu != this_cpu && hrtimer_check_target(timer, new_base)) {
cpu = this_cpu;
- spin_unlock(&new_base->cpu_base->lock);
- spin_lock(&base->cpu_base->lock);
+ raw_spin_unlock(&new_base->cpu_base->lock);
+ raw_spin_lock(&base->cpu_base->lock);
timer->base = base;
goto again;
}
@@ -230,7 +230,7 @@ lock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
{
struct hrtimer_clock_base *base = timer->base;
- spin_lock_irqsave(&base->cpu_base->lock, *flags);
+ raw_spin_lock_irqsave(&base->cpu_base->lock, *flags);
return base;
}
@@ -628,12 +628,12 @@ static void retrigger_next_event(void *arg)
base = &__get_cpu_var(hrtimer_bases);
/* Adjust CLOCK_REALTIME offset */
- spin_lock(&base->lock);
+ raw_spin_lock(&base->lock);
base->clock_base[CLOCK_REALTIME].offset =
timespec_to_ktime(realtime_offset);
hrtimer_force_reprogram(base, 0);
- spin_unlock(&base->lock);
+ raw_spin_unlock(&base->lock);
}
/*
@@ -694,9 +694,9 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
{
if (base->cpu_base->hres_active && hrtimer_reprogram(timer, base)) {
if (wakeup) {
- spin_unlock(&base->cpu_base->lock);
+ raw_spin_unlock(&base->cpu_base->lock);
raise_softirq_irqoff(HRTIMER_SOFTIRQ);
- spin_lock(&base->cpu_base->lock);
+ raw_spin_lock(&base->cpu_base->lock);
} else
__raise_softirq_irqoff(HRTIMER_SOFTIRQ);
@@ -790,7 +790,7 @@ static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
static inline
void unlock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
{
- spin_unlock_irqrestore(&timer->base->cpu_base->lock, *flags);
+ raw_spin_unlock_irqrestore(&timer->base->cpu_base->lock, *flags);
}
/**
@@ -1123,7 +1123,7 @@ ktime_t hrtimer_get_next_event(void)
unsigned long flags;
int i;
- spin_lock_irqsave(&cpu_base->lock, flags);
+ raw_spin_lock_irqsave(&cpu_base->lock, flags);
if (!hrtimer_hres_active()) {
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
@@ -1140,7 +1140,7 @@ ktime_t hrtimer_get_next_event(void)
}
}
- spin_unlock_irqrestore(&cpu_base->lock, flags);
+ raw_spin_unlock_irqrestore(&cpu_base->lock, flags);
if (mindelta.tv64 < 0)
mindelta.tv64 = 0;
@@ -1222,11 +1222,11 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
* they get migrated to another cpu, therefore its safe to unlock
* the timer base.
*/
- spin_unlock(&cpu_base->lock);
+ raw_spin_unlock(&cpu_base->lock);
trace_hrtimer_expire_entry(timer, now);
restart = fn(timer);
trace_hrtimer_expire_exit(timer);
- spin_lock(&cpu_base->lock);
+ raw_spin_lock(&cpu_base->lock);
/*
* Note: We clear the CALLBACK bit after enqueue_hrtimer and
@@ -1261,7 +1261,7 @@ void hrtimer_interrupt(struct clock_event_device *dev)
retry:
expires_next.tv64 = KTIME_MAX;
- spin_lock(&cpu_base->lock);
+ raw_spin_lock(&cpu_base->lock);
/*
* We set expires_next to KTIME_MAX here with cpu_base->lock
* held to prevent that a timer is enqueued in our queue via
@@ -1317,7 +1317,7 @@ retry:
* against it.
*/
cpu_base->expires_next = expires_next;
- spin_unlock(&cpu_base->lock);
+ raw_spin_unlock(&cpu_base->lock);
/* Reprogramming necessary ? */
if (expires_next.tv64 == KTIME_MAX ||
@@ -1457,7 +1457,7 @@ void hrtimer_run_queues(void)
gettime = 0;
}
- spin_lock(&cpu_base->lock);
+ raw_spin_lock(&cpu_base->lock);
while ((node = base->first)) {
struct hrtimer *timer;
@@ -1469,7 +1469,7 @@ void hrtimer_run_queues(void)
__run_hrtimer(timer, &base->softirq_time);
}
- spin_unlock(&cpu_base->lock);
+ raw_spin_unlock(&cpu_base->lock);
}
}
@@ -1625,7 +1625,7 @@ static void __cpuinit init_hrtimers_cpu(int cpu)
struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
int i;
- spin_lock_init(&cpu_base->lock);
+ raw_spin_lock_init(&cpu_base->lock);
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++)
cpu_base->clock_base[i].cpu_base = cpu_base;
@@ -1683,16 +1683,16 @@ static void migrate_hrtimers(int scpu)
* The caller is globally serialized and nobody else
* takes two locks at once, deadlock is not possible.
*/
- spin_lock(&new_base->lock);
- spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
+ raw_spin_lock(&new_base->lock);
+ raw_spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
migrate_hrtimer_list(&old_base->clock_base[i],
&new_base->clock_base[i]);
}
- spin_unlock(&old_base->lock);
- spin_unlock(&new_base->lock);
+ raw_spin_unlock(&old_base->lock);
+ raw_spin_unlock(&new_base->lock);
/* Check, if we got expired work to do */
__hrtimer_peek_ahead_timers();