diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2008-05-12 21:20:53 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 21:08:47 +0200 |
| commit | 88a4216c3ec4281fc7e6725cc3a3ccd01fb1aa14 (patch) | |
| tree | 3d93bdfa757da02953ec2532f7504a2e7f81ea78 /kernel/trace/trace_sched_switch.c | |
| parent | ftrace: sched tree fix (diff) | |
| download | linux-dev-88a4216c3ec4281fc7e6725cc3a3ccd01fb1aa14.tar.xz linux-dev-88a4216c3ec4281fc7e6725cc3a3ccd01fb1aa14.zip | |
ftrace: sched special
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/trace/trace_sched_switch.c')
| -rw-r--r-- | kernel/trace/trace_sched_switch.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index 5a217e863586..bddf676914ed 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -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; |