28 lines
1.0 KiB
Diff
28 lines
1.0 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
Date: Thu, 19 May 2016 17:12:34 +0200
|
|
Subject: [PATCH] kernel/rtmutex: only warn once on a try lock from bad
|
|
context
|
|
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.6/older/patches-4.6.2-rt5.tar.xz
|
|
|
|
One warning should be enough to get one motivated to fix this. It is
|
|
possible that this happens more than once and so starts flooding the
|
|
output. Later the prints will be suppressed so we only get half of it.
|
|
Depending on the console system used it might not be helpfull.
|
|
|
|
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
---
|
|
kernel/locking/rtmutex.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
--- a/kernel/locking/rtmutex.c
|
|
+++ b/kernel/locking/rtmutex.c
|
|
@@ -1479,7 +1479,7 @@ EXPORT_SYMBOL_GPL(rt_mutex_timed_lock);
|
|
int __sched rt_mutex_trylock(struct rt_mutex *lock)
|
|
{
|
|
#ifdef CONFIG_PREEMPT_RT_FULL
|
|
- if (WARN_ON(in_irq() || in_nmi()))
|
|
+ if (WARN_ON_ONCE(in_irq() || in_nmi()))
|
|
#else
|
|
if (WARN_ON(in_irq() || in_nmi() || in_serving_softirq()))
|
|
#endif
|