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Subject: signal: Make __lock_task_sighand() RT aware
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 22 Jul 2011 08:07:08 +0200
local_irq_save() + spin_lock(&sighand->siglock) does not work on
-RT. Use the nort variants.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/signal.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1295,12 +1295,12 @@ struct sighand_struct *__lock_task_sigha
* Disable interrupts early to avoid deadlocks.
* See rcu_read_unlock() comment header for details.
*/
- local_irq_save(*flags);
+ local_irq_save_nort(*flags);
rcu_read_lock();
sighand = rcu_dereference(tsk->sighand);
if (unlikely(sighand == NULL)) {
rcu_read_unlock();
- local_irq_restore(*flags);
+ local_irq_restore_nort(*flags);
break;
}
/*
@@ -1321,7 +1321,7 @@ struct sighand_struct *__lock_task_sigha
}
spin_unlock(&sighand->siglock);
rcu_read_unlock();
- local_irq_restore(*flags);
+ local_irq_restore_nort(*flags);
}
return sighand;
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