45 lines
1.8 KiB
Diff
45 lines
1.8 KiB
Diff
From 6fc5e9ec34e6b95824eeda47bd80c6e920f6ca61 Mon Sep 17 00:00:00 2001
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Message-Id: <6fc5e9ec34e6b95824eeda47bd80c6e920f6ca61.1601675153.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Julien Grall <julien.grall@arm.com>
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Date: Wed, 21 Aug 2019 10:24:08 +0100
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Subject: [PATCH 294/333] hrtimer: Don't grab the expiry lock for non-soft
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hrtimer
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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[ Upstream commit fd420354bea2f57c11f3de191dffdeea76531e76 ]
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Acquiring the lock in hrtimer_grab_expiry_lock() is designed for
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sleeping-locks and should not be used with disabled interrupts.
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hrtimer_cancel() may invoke hrtimer_grab_expiry_lock() also for locks
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which expire in hard-IRQ context.
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Let hrtimer_cancel() invoke hrtimer_grab_expiry_lock() only for locks
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which expire in softirq context.
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Signed-off-by: Julien Grall <julien.grall@arm.com>
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Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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[bigeasy: rewrite changelog]
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/time/hrtimer.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
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index d6026c170c2d..49d20fe8570f 100644
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--- a/kernel/time/hrtimer.c
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+++ b/kernel/time/hrtimer.c
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@@ -943,7 +943,7 @@ void hrtimer_grab_expiry_lock(const struct hrtimer *timer)
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{
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struct hrtimer_clock_base *base = READ_ONCE(timer->base);
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- if (base && base->cpu_base) {
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+ if (timer->is_soft && base && base->cpu_base) {
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spin_lock(&base->cpu_base->softirq_expiry_lock);
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spin_unlock(&base->cpu_base->softirq_expiry_lock);
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}
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--
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2.17.1
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