Jetpack/kernel/kernel-4.9/rt-patches/0156-kernel-softirq-unlock-...

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Diff

From dedad90edc15c1c487350d015660dc18336380a1 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 9 Feb 2016 18:17:18 +0100
Subject: [PATCH 156/352] kernel: softirq: unlock with irqs on
We unlock the lock while the interrupts are off. This isn't a problem
now but will get because the migrate_disable() + enable are not
symmetrical in regard to the status of interrupts.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
kernel/softirq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index e7693cd..7bed42c 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -564,8 +564,10 @@ static void do_current_softirqs(void)
do_single_softirq(i);
}
softirq_clr_runner(i);
- unlock_softirq(i);
WARN_ON(current->softirq_nestcnt != 1);
+ local_irq_enable();
+ unlock_softirq(i);
+ local_irq_disable();
}
}
--
2.7.4