38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
|
From 0a6252b56566b3055c16a999ca0b2335c1c70c14 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
||
|
|
Date: Thu, 17 Aug 2017 11:38:51 +0200
|
||
|
|
Subject: [PATCH 333/365] PM / CPU: replace raw_notifier with atomic_notifier
|
||
|
|
(fixup)
|
||
|
|
|
||
|
|
The original patch changed betwen its posting and what finally went into
|
||
|
|
Rafael's tree so here is the delta.
|
||
|
|
|
||
|
|
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
||
|
|
---
|
||
|
|
kernel/cpu_pm.c | 7 +++++++
|
||
|
|
1 file changed, 7 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/kernel/cpu_pm.c b/kernel/cpu_pm.c
|
||
|
|
index f6a81195f775..1b7d94eda1e6 100644
|
||
|
|
--- a/kernel/cpu_pm.c
|
||
|
|
+++ b/kernel/cpu_pm.c
|
||
|
|
@@ -28,8 +28,15 @@ static int cpu_pm_notify(enum cpu_pm_event event, int nr_to_call, int *nr_calls)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
+ /*
|
||
|
|
+ * __atomic_notifier_call_chain has a RCU read critical section, which
|
||
|
|
+ * could be disfunctional in cpu idle. Copy RCU_NONIDLE code to let
|
||
|
|
+ * RCU know this.
|
||
|
|
+ */
|
||
|
|
+ rcu_irq_enter_irqson();
|
||
|
|
ret = __atomic_notifier_call_chain(&cpu_pm_notifier_chain, event, NULL,
|
||
|
|
nr_to_call, nr_calls);
|
||
|
|
+ rcu_irq_exit_irqson();
|
||
|
|
|
||
|
|
return notifier_to_errno(ret);
|
||
|
|
}
|
||
|
|
--
|
||
|
|
2.28.0
|
||
|
|
|