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ftrace: sched special

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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 21:20:53 +02:00 • committed by Thomas Gleixner
parent 36fc25a9f4
commit 88a4216c3e
4 changed files with 36 additions and 3 deletions
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24
kernel/trace/trace_sched_switch.c
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@ -103,6 +103,30 @@ ftrace_wake_up_task(void *__rq, struct task_struct *wakee,
wakeup_sched_wakeup(wakee, curr);
}
void
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
struct trace_array *tr = ctx_trace;
struct trace_array_cpu *data;
unsigned long flags;
long disabled;
int cpu;
if (!tracer_enabled)
return;
local_irq_save(flags);
cpu = raw_smp_processor_id();
data = tr->data[cpu];
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1))
__trace_special(tr, data, arg1, arg2, arg3);
atomic_dec(&data->disabled);
local_irq_restore(flags);
}
static void sched_switch_reset(struct trace_array *tr)
{
int cpu;