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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