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ftrace, locking fix 

should be an irq-safe lock ...

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-05-12 21:20:48 +02:00 committed by Thomas Gleixner
parent f0a920d575
commit dcb6308f2b
1 changed files with 9 additions and 6 deletions
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15
kernel/trace/trace.c
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@ -691,14 +691,15 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long ip, unsigned long parent_ip, unsigned long flags)
{
struct trace_entry *entry;
unsigned long irq_flags;
spin_lock(&data->lock);
spin_lock_irqsave(&data->lock, irq_flags);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_FN;
entry->fn.ip = ip;
entry->fn.parent_ip = parent_ip;
spin_unlock(&data->lock);
spin_unlock_irqrestore(&data->lock, irq_flags);
}
notrace void
@ -706,15 +707,16 @@ trace_special(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
struct trace_entry *entry;
unsigned long irq_flags;
spin_lock(&data->lock);
spin_lock_irqsave(&data->lock, irq_flags);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
entry->type = TRACE_SPECIAL;
entry->special.arg1 = arg1;
entry->special.arg2 = arg2;
entry->special.arg3 = arg3;
spin_unlock(&data->lock);
spin_unlock_irqrestore(&data->lock, irq_flags);
}
notrace void
@ -724,8 +726,9 @@ tracing_sched_switch_trace(struct trace_array *tr,
unsigned long flags)
{
struct trace_entry *entry;
unsigned long irq_flags;
spin_lock(&data->lock);
spin_lock_irqsave(&data->lock, irq_flags);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_CTX;
@ -734,7 +737,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
entry->ctx.prev_state = prev->state;
entry->ctx.next_pid = next->pid;
entry->ctx.next_prio = next->prio;
spin_unlock(&data->lock);
spin_unlock_irqrestore(&data->lock, irq_flags);
}
enum trace_file_type {