[PATCH 1/1] rcutree/rcu_bh_qs: disable irq while calling rcu_preempt_qs()
From: Tiejun Chen <hidden>
Date: 2013-12-05 09:52:35
Subsystem:
the rest · Maintainer:
Linus Torvalds
Any callers should make sure irq is disabled before calling rcu_preempt_qs(). Signed-off-by: Tiejun Chen <redacted> --- 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)
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1.7.9.5