From: Anna-Maria Gleixner <anna-maria@linutronix.de>
Date: Thu, 17 Mar 2016 10:14:35 +0000 (+0100)
Subject: rcutorture: Consider FROZEN hotplug notifier transitions
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=de26ca19a530d2d822a6816834d22022e94b2e53;p=linux-beck.git

rcutorture: Consider FROZEN hotplug notifier transitions

The hotplug notifier rcutorture_cpu_notify() doesn't consider the
corresponding CPU_XXX_FROZEN transitions. They occur on
suspend/resume and are usually handled the same way as the
corresponding non frozen transitions.

Mask the switch case action argument with '~CPU_TASKS_FROZEN' to map
CPU_XXX_FROZEN hotplug transitions on corresponding non-frozen
transitions.

Cc: Josh Triplett <josh@joshtriplett.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 52b49fe90919..633a68a09440 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1585,7 +1585,7 @@ static int rcutorture_cpu_notify(struct notifier_block *self,
 {
 	long cpu = (long)hcpu;
 
-	switch (action) {
+	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_ONLINE:
 	case CPU_DOWN_FAILED:
 		(void)rcutorture_booster_init(cpu);