From 69e2c2ae6af68ab499cad3330b6b10c2da1c0949 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 17 Sep 2009 17:31:09 +0200 Subject: [PATCH] latencytop: Convert latency_lock to raw_spinlock commit 0dfea57f1f486188303e598f96f0f92995bf9276 in tip. latency_lock is taken in the guts of the scheduler code and needs to be a real spinlock on RT. convert it to raw_spinlock. Signed-off-by: Thomas Gleixner Signed-off-by: Paul Gortmaker --- kernel/latencytop.c | 14 +++++++------- 1 files changed, 7 insertions(+), 7 deletions(-) diff --git a/kernel/latencytop.c b/kernel/latencytop.c index 877fb30..3f89349 100644 --- a/kernel/latencytop.c +++ b/kernel/latencytop.c @@ -58,7 +58,7 @@ #include #include -static DEFINE_SPINLOCK(latency_lock); +static DEFINE_RAW_SPINLOCK(latency_lock); #define MAXLR 128 static struct latency_record latency_record[MAXLR]; @@ -72,19 +72,19 @@ void clear_all_latency_tracing(struct task_struct *p) if (!latencytop_enabled) return; - spin_lock_irqsave(&latency_lock, flags); + raw_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); + raw_spin_unlock_irqrestore(&latency_lock, flags); } static void clear_global_latency_tracing(void) { unsigned long flags; - spin_lock_irqsave(&latency_lock, flags); + raw_spin_lock_irqsave(&latency_lock, flags); memset(&latency_record, 0, sizeof(latency_record)); - spin_unlock_irqrestore(&latency_lock, flags); + raw_spin_unlock_irqrestore(&latency_lock, flags); } static void __sched @@ -190,7 +190,7 @@ __account_scheduler_latency(struct task_struct *tsk, int usecs, int inter) lat.max = usecs; store_stacktrace(tsk, &lat); - spin_lock_irqsave(&latency_lock, flags); + raw_spin_lock_irqsave(&latency_lock, flags); account_global_scheduler_latency(tsk, &lat); @@ -232,7 +232,7 @@ __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); + raw_spin_unlock_irqrestore(&latency_lock, flags); } static int lstats_show(struct seq_file *m, void *v) -- 1.7.0.4