40 lines
1.1 KiB
Diff
40 lines
1.1 KiB
Diff
Subject: signal: Make __lock_task_sighand() RT aware
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Fri, 22 Jul 2011 08:07:08 +0200
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.14/older/patches-4.14.15-rt13.tar.xz
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local_irq_save() + spin_lock(&sighand->siglock) does not work on
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-RT. Use the nort variants.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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kernel/signal.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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--- a/kernel/signal.c
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+++ b/kernel/signal.c
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@@ -1302,12 +1302,12 @@ struct sighand_struct *__lock_task_sigha
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* Disable interrupts early to avoid deadlocks.
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* See rcu_read_unlock() comment header for details.
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*/
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- local_irq_save(*flags);
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+ local_irq_save_nort(*flags);
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rcu_read_lock();
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sighand = rcu_dereference(tsk->sighand);
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if (unlikely(sighand == NULL)) {
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rcu_read_unlock();
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- local_irq_restore(*flags);
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+ local_irq_restore_nort(*flags);
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break;
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}
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/*
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@@ -1328,7 +1328,7 @@ struct sighand_struct *__lock_task_sigha
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}
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spin_unlock(&sighand->siglock);
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rcu_read_unlock();
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- local_irq_restore(*flags);
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+ local_irq_restore_nort(*flags);
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}
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return sighand;
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