40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
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From d4cdee35a25f1ae496804adf7ea821fc8bb312c5 Mon Sep 17 00:00:00 2001
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Wed, 1 Mar 2017 16:30:49 +0100
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Subject: [PATCH 126/365] timer/hrtimer: check properly for a running timer
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hrtimer_callback_running() checks only whether a timmer is running on a
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CPU in hardirq-context. This is okay for !RT. For RT environment we move
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most timers to the timer-softirq and therefore we therefore need to
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check if the timer is running in the softirq context.
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Cc: stable-rt@vger.kernel.org
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Reported-by: Alexander Gerasiov <gq@cs.msu.su>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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include/linux/hrtimer.h | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
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index 74532c59d066..cf423f1570c5 100644
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--- a/include/linux/hrtimer.h
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+++ b/include/linux/hrtimer.h
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@@ -461,7 +461,13 @@ static inline bool hrtimer_is_queued(struct hrtimer *timer)
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*/
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static inline int hrtimer_callback_running(const struct hrtimer *timer)
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{
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- return timer->base->cpu_base->running == timer;
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+ if (timer->base->cpu_base->running == timer)
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+ return 1;
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+#ifdef CONFIG_PREEMPT_RT_BASE
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+ if (timer->base->cpu_base->running_soft == timer)
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+ return 1;
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+#endif
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+ return 0;
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}
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/* Forward a hrtimer so it expires after now: */
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--
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2.28.0
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