From: Youngtae Lee <yt0729.lee@samsung.com>
Date: Mon, 23 Apr 2018 12:06:54 +0000 (+0900)
Subject: DEBUG: Add trace for cpus_up/down.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=80960b5ed6cdb12c25745a1142d4f711dae3ffac;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

DEBUG: Add trace for cpus_up/down.

Change-Id: Ic19ff47bd706813bafc99f2d3e421d846acb5c42
Signed-off-by: Youngtae Lee <yt0729.lee@samsung.com>
---

diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 13b38537d439..38e730981b6e 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -800,6 +800,75 @@ TRACE_EVENT(emc_update_cpu_pwr,
 	TP_printk("pre_cpu_mask=%x, cpu=%u, on=%s", __entry->pre_cpu_mask,
 					__entry->cpu, __entry->on? "ON" : "OFF")
 );
+
+TRACE_EVENT(cpus_up_enter,
+
+	TP_PROTO(int cpu),
+
+	TP_ARGS(cpu),
+
+	TP_STRUCT__entry(
+		__field(int, cpu)
+	),
+
+	TP_fast_assign(
+		__entry->cpu = cpu;
+	),
+
+	TP_printk("enter cpus_up cpu%d", __entry->cpu)
+);
+
+TRACE_EVENT(cpus_up_exit,
+
+	TP_PROTO(int cpu),
+
+	TP_ARGS(cpu),
+
+	TP_STRUCT__entry(
+		__field(int, cpu)
+	),
+
+	TP_fast_assign(
+		__entry->cpu = cpu;
+	),
+
+	TP_printk("exit cpus_up cpu%d", __entry->cpu)
+);
+
+TRACE_EVENT(cpus_down_enter,
+
+	TP_PROTO(int cpu),
+
+	TP_ARGS(cpu),
+
+	TP_STRUCT__entry(
+		__field(int, cpu)
+	),
+
+	TP_fast_assign(
+		__entry->cpu = cpu;
+	),
+
+	TP_printk("enter cpus_down cpu%d", __entry->cpu)
+);
+
+TRACE_EVENT(cpus_down_exit,
+
+	TP_PROTO(int cpu),
+
+	TP_ARGS(cpu),
+
+	TP_STRUCT__entry(
+		__field(int, cpu)
+	),
+
+	TP_fast_assign(
+		__entry->cpu = cpu;
+	),
+
+	TP_printk("exit cpus_down cpu%d", __entry->cpu)
+);
+
 #endif /* _TRACE_POWER_H */
 
 /* This part must be outside protection */
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 5a8e86826949..e76e357144da 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1122,6 +1122,7 @@ int cpus_down(struct cpumask cpus)
 {
 	int err, cpu;
 
+	trace_cpus_down_enter(cpumask_first(&cpus));
 	cpu_maps_update_begin();
 
 	if (cpu_hotplug_disabled) {
@@ -1139,6 +1140,7 @@ int cpus_down(struct cpumask cpus)
 
 out:
 	cpu_maps_update_done();
+	trace_cpus_down_exit(cpumask_first(&cpus));
 	return err;
 }
 EXPORT_SYMBOL_GPL(cpus_down);
@@ -1456,6 +1458,7 @@ int cpus_up(struct cpumask cpus)
 {
 	int cpu, err = 0;
 
+	trace_cpus_up_enter(cpumask_first(&cpus));
 	for_each_cpu(cpu, &cpus)
 		if (cpu_online(cpu)) {
 			cpumask_clear_cpu(cpu, &cpus);
@@ -1478,6 +1481,7 @@ int cpus_up(struct cpumask cpus)
 	err = _cpus_up(cpus, 0, CPUHP_ONLINE);
 out:
 	cpu_maps_update_done();
+	trace_cpus_up_exit(cpumask_first(&cpus));
 
 	return err;
 }