---

yaml
---
r: 140981
b: refs/heads/master
c: 4903620
h: refs/heads/master
i:
  140979: c204475
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 327019b01e068d66dada6a8b2571180ab3674d20
+refs/heads/master: 490362003457f8d387f6f6e73e3a7efbf56c3314

trunk/kernel/trace/trace_selftest.c

@@ -315,6 +315,14 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
 	local_irq_disable();
 	udelay(100);
 	local_irq_enable();
+
+	/*
+	 * Stop the tracer to avoid a warning subsequent
+	 * to buffer flipping failure because tracing_stop()
+	 * disables the tr and max buffers, making flipping impossible
+	 * in case of parallels max irqs off latencies.
+	 */
+	trace->stop(tr);
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
@@ -369,6 +377,14 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
 	preempt_disable();
 	udelay(100);
 	preempt_enable();
+
+	/*
+	 * Stop the tracer to avoid a warning subsequent
+	 * to buffer flipping failure because tracing_stop()
+	 * disables the tr and max buffers, making flipping impossible
+	 * in case of parallels max preempt off latencies.
+	 */
+	trace->stop(tr);
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
@@ -428,6 +444,13 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
 	/* reverse the order of preempt vs irqs */
 	local_irq_enable();
 
+	/*
+	 * Stop the tracer to avoid a warning subsequent
+	 * to buffer flipping failure because tracing_stop()
+	 * disables the tr and max buffers, making flipping impossible
+	 * in case of parallels max irqs/preempt off latencies.
+	 */
+	trace->stop(tr);
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
@@ -448,13 +471,16 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
 	/* do the test by disabling interrupts first this time */
 	tracing_max_latency = 0;
 	tracing_start();
+	trace->start(tr);
+
 	preempt_disable();
 	local_irq_disable();
 	udelay(100);
 	preempt_enable();
 	/* reverse the order of preempt vs irqs */
 	local_irq_enable();
 
+	trace->stop(tr);
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */