tracing: do not update tracing_max_latency when tracer is stopped

[pandora-kernel.git] / kernel / trace / trace_sched_wakeup.c

diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 6e1529b..26185d7 100644 (file)
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -162,8 +162,10 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
        if (!report_latency(delta))
                goto out_unlock;
 
-       tracing_max_latency = delta;
-       update_max_tr(wakeup_trace, wakeup_task, wakeup_cpu);
+       if (likely(!is_tracing_stopped())) {
+               tracing_max_latency = delta;
+               update_max_tr(wakeup_trace, wakeup_task, wakeup_cpu);
+       }
 
 out_unlock:
        __wakeup_reset(wakeup_trace);