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Commit aaf0f2fa authored by Eric Dumazet's avatar Eric Dumazet Committed by Tejun Heo
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percpu_counter: percpu_counter_hotcpu_callback() cleanup 



In commit ebd8fef3 ("percpu_counter: make percpu_counters_lock
irq-safe") we disabled irqs in percpu_counter_hotcpu_callback()

We can grab every counter spinlock without having to disable
irqs again.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 44b4b461

lib/percpu_counter.c

+2 −3
Original line number Diff line number Diff line
@@ -176,13 +176,12 @@ static int percpu_counter_cpu_dead(unsigned int cpu) 
	spin_lock_irq(&percpu_counters_lock);

	list_for_each_entry(fbc, &percpu_counters, list) {

		s32 *pcount;

		unsigned long flags;



		raw_spin_lock_irqsave(&fbc->lock, flags);

		raw_spin_lock(&fbc->lock);

		pcount = per_cpu_ptr(fbc->counters, cpu);

		fbc->count += *pcount;

		*pcount = 0;

		raw_spin_unlock_irqrestore(&fbc->lock, flags);

		raw_spin_unlock(&fbc->lock);

	}

	spin_unlock_irq(&percpu_counters_lock);

#endif