diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-09-17 17:31:09 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-09-17 17:31:09 +0200 |
| commit | 0dfea57f1f486188303e598f96f0f92995bf9276 (patch) | |
| tree | ada6ad1800752da598227ccb9086c359b9644630 /kernel | |
| parent | cc2fa4463d673896b9904c4142c6377d0d1d93e6 (diff) | |
latencytop: Convert latency_lock to atomic_spinlock
latency_lock is taken in the guts of the scheduler code and needs to
be a real spinlock on RT. convert it to atomic_spinlock.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/latencytop.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/kernel/latencytop.c b/kernel/latencytop.c index ca07c5c0c914..34311e1d0572 100644 --- a/kernel/latencytop.c +++ b/kernel/latencytop.c @@ -59,7 +59,7 @@ #include <linux/slab.h> #include <linux/stacktrace.h> -static DEFINE_SPINLOCK(latency_lock); +static DEFINE_ATOMIC_SPINLOCK(latency_lock); #define MAXLR 128 static struct latency_record latency_record[MAXLR]; @@ -73,19 +73,19 @@ void clear_all_latency_tracing(struct task_struct *p) if (!latencytop_enabled) return; - spin_lock_irqsave(&latency_lock, flags); + atomic_spin_lock_irqsave(&latency_lock, flags); memset(&p->latency_record, 0, sizeof(p->latency_record)); p->latency_record_count = 0; - spin_unlock_irqrestore(&latency_lock, flags); + atomic_spin_unlock_irqrestore(&latency_lock, flags); } static void clear_global_latency_tracing(void) { unsigned long flags; - spin_lock_irqsave(&latency_lock, flags); + atomic_spin_lock_irqsave(&latency_lock, flags); memset(&latency_record, 0, sizeof(latency_record)); - spin_unlock_irqrestore(&latency_lock, flags); + atomic_spin_unlock_irqrestore(&latency_lock, flags); } static void __sched @@ -191,7 +191,7 @@ __account_scheduler_latency(struct task_struct *tsk, int usecs, int inter) lat.max = usecs; store_stacktrace(tsk, &lat); - spin_lock_irqsave(&latency_lock, flags); + atomic_spin_lock_irqsave(&latency_lock, flags); account_global_scheduler_latency(tsk, &lat); @@ -233,7 +233,7 @@ __account_scheduler_latency(struct task_struct *tsk, int usecs, int inter) memcpy(&tsk->latency_record[i], &lat, sizeof(struct latency_record)); out_unlock: - spin_unlock_irqrestore(&latency_lock, flags); + atomic_spin_unlock_irqrestore(&latency_lock, flags); } static int lstats_show(struct seq_file *m, void *v) |