Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1348231 > unrolled thread

[PATCH RT 05/10] kernel: softirq: unlock with irqs on

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  [PATCH RT 05/10] kernel: softirq: unlock with irqs on Steven Rostedt <rostedt@goodmis.org> - 2016-03-02 17:00 +0100

#1348231 — [PATCH RT 05/10] kernel: softirq: unlock with irqs on

3.10.97-rt107-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

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>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 kernel/softirq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/softirq.c b/kernel/softirq.c
index ce2cfd3910d4..463523131bfa 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -580,8 +580,10 @@ static void do_current_softirqs(int need_rcu_bh_qs)
 			do_single_softirq(i, need_rcu_bh_qs);
 		}
 		softirq_clr_runner(i);
-		unlock_softirq(i);
 		WARN_ON(current->softirq_nestcnt != 1);
+		local_irq_enable();
+		unlock_softirq(i);
+		local_irq_disable();
 	}
 }
 
-- 
2.7.0

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web