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kvfree_rcu: Make krc_this_cpu_unlock() use raw_spin_unlock_irqrestore()
The krc_this_cpu_unlock() function does a raw_spin_unlock() immediately followed by a local_irq_restore(). This commit saves a line of code by merging them into a raw_spin_unlock_irqrestore(). This transformation also reduces scheduling latency because raw_spin_unlock_irqrestore() responds immediately to a reschedule request. In contrast, local_irq_restore() does a scheduling-oblivious enabling of interrupts. Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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1 changed files with 1 additions and 2 deletions
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@ -3229,8 +3229,7 @@ krc_this_cpu_lock(unsigned long *flags)
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static inline void
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krc_this_cpu_unlock(struct kfree_rcu_cpu *krcp, unsigned long flags)
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{
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raw_spin_unlock(&krcp->lock);
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local_irq_restore(flags);
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raw_spin_unlock_irqrestore(&krcp->lock, flags);
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}
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static inline struct kvfree_rcu_bulk_data *
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