From: Tiejun Chen <tiejun.chen@windriver.com>
To: <bigeasy@linutronix.de>, <tglx@linutronix.de>
Cc: <linux-rt-users@vger.kernel.org>
Subject: [PATCH 1/1] rcutree/rcu_bh_qs: disable irq while calling rcu_preempt_qs()
Date: Thu, 5 Dec 2013 17:52:42 +0800 [thread overview]
Message-ID: <1386237162-10141-1-git-send-email-tiejun.chen@windriver.com> (raw)
Any callers should make sure irq is disabled before calling rcu_preempt_qs().
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
---
kernel/rcutree.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 7ec834d..6f6d133 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -186,7 +186,12 @@ static void rcu_preempt_qs(int cpu);
void rcu_bh_qs(int cpu)
{
+ unsigned long flags;
+
+ /* Callers to this function, rcu_preempt_qs(), must disable irqs. */
+ local_irq_save(flags);
rcu_preempt_qs(cpu);
+ local_irq_restore(flags);
}
#else
void rcu_bh_qs(int cpu)
--
1.7.9.5
next reply other threads:[~2013-12-05 9:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-05 9:52 Tiejun Chen [this message]
2013-12-05 15:26 ` [PATCH 1/1] rcutree/rcu_bh_qs: disable irq while calling rcu_preempt_qs() Paul Gortmaker
2013-12-06 1:57 ` "“tiejun.chen”"
2013-12-06 17:13 ` Paul Gortmaker
2013-12-15 12:01 ` Sebastian Andrzej Siewior
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