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hrtimers: Convert to raw_spinlocks

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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>
This commit is contained in:
Thomas Gleixner
2009-11-17 16:36:54 +01:00
parent 239007b844
commit ecb49d1a63
4 changed files with 38 additions and 37 deletions
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kernel/time/timer_stats.c
+9 -8
View File
@@ -86,7 +86,7 @@ static DEFINE_SPINLOCK(table_lock);
/*
* Per-CPU lookup locks for fast hash lookup:
*/
static DEFINE_PER_CPU(spinlock_t, tstats_lookup_lock);
static DEFINE_PER_CPU(raw_spinlock_t, tstats_lookup_lock);
/*
* Mutex to serialize state changes with show-stats activities:
@@ -238,7 +238,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
/*
* It doesnt matter which lock we take:
*/
spinlock_t *lock;
raw_spinlock_t *lock;
struct entry *entry, input;
unsigned long flags;
@@ -253,7 +253,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
input.pid = pid;
input.timer_flag = timer_flag;
spin_lock_irqsave(lock, flags);
raw_spin_lock_irqsave(lock, flags);
if (!timer_stats_active)
goto out_unlock;
@@ -264,7 +264,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
atomic_inc(&overflow_count);
out_unlock:
spin_unlock_irqrestore(lock, flags);
raw_spin_unlock_irqrestore(lock, flags);
}
static void print_name_offset(struct seq_file *m, unsigned long addr)
@@ -348,10 +348,11 @@ static void sync_access(void)
int cpu;
for_each_online_cpu(cpu) {
spinlock_t *lock = &per_cpu(tstats_lookup_lock, cpu);
spin_lock_irqsave(lock, flags);
raw_spinlock_t *lock = &per_cpu(tstats_lookup_lock, cpu);
raw_spin_lock_irqsave(lock, flags);
/* nothing */
spin_unlock_irqrestore(lock, flags);
raw_spin_unlock_irqrestore(lock, flags);
}
}
@@ -409,7 +410,7 @@ void __init init_timer_stats(void)
int cpu;
for_each_possible_cpu(cpu)
spin_lock_init(&per_cpu(tstats_lookup_lock, cpu));
raw_spin_lock_init(&per_cpu(tstats_lookup_lock, cpu));
}
static int __init init_tstats_procfs(void)