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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-05-27 16:47:18 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-06-08 15:22:00 +0300 |
| commit | a461d58792d4a46b8b10ae50973ec9b2763b694e (patch) | |
| tree | 9b4b6901645271d52eb3a524922a2174e072bbae /kernel/locking/rtmutex.c | |
| parent | dfaaf3fa01d65cf6e2072965bb0b7aaa7285344f (diff) | |
| download | linux-a461d58792d4a46b8b10ae50973ec9b2763b694e.tar.xz | |
locking/rtmutex: Only warn once on a trylock from bad context
One warning should be enough to get one motivated to fix this. It is
possible that this happens more than once and that 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 helpful.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1464356838-1755-1-git-send-email-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking/rtmutex.c')
| -rw-r--r-- | kernel/locking/rtmutex.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 3e746607abe5..1ec0f48962b3 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1478,7 +1478,7 @@ EXPORT_SYMBOL_GPL(rt_mutex_timed_lock); */ int __sched rt_mutex_trylock(struct rt_mutex *lock) { - if (WARN_ON(in_irq() || in_nmi() || in_serving_softirq())) + if (WARN_ON_ONCE(in_irq() || in_nmi() || in_serving_softirq())) return 0; return rt_mutex_fasttrylock(lock, rt_mutex_slowtrylock); |