Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Thomas Gleixner:
"rt_mutex_futex_unlock() grew a new irq-off call site, but the function
assumes that its always called from irq enabled context.
Use (un)lock_irqsafe() to handle the new call site correctly"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rtmutex: Make rt_mutex_futex_unlock() safe for irq-off callsites
+3
-2
+3
-2
kernel/locking/rtmutex.c
+3
-2
kernel/locking/rtmutex.c
···
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void __sched rt_mutex_futex_unlock(struct rt_mutex *lock)
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{
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DEFINE_WAKE_Q(wake_q);
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+
unsigned long flags;
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bool postunlock;
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-
raw_spin_lock_irq(&lock->wait_lock);
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+
raw_spin_lock_irqsave(&lock->wait_lock, flags);
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postunlock = __rt_mutex_futex_unlock(lock, &wake_q);
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-
raw_spin_unlock_irq(&lock->wait_lock);
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+
raw_spin_unlock_irqrestore(&lock->wait_lock, flags);
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if (postunlock)
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rt_mutex_postunlock(&wake_q);