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x86: remove vector_lock around cpu_online_map
This lock does not protect cpu_online_map, so its length can be shortened, and in some cases, removed. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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70708a18e8
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1 changed files with 1 additions and 3 deletions
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@ -261,9 +261,9 @@ void __cpuinit start_secondary(void)
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/*
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/*
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* Allow the master to continue.
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* Allow the master to continue.
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*/
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*/
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spin_unlock(&vector_lock);
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cpu_set(smp_processor_id(), cpu_online_map);
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cpu_set(smp_processor_id(), cpu_online_map);
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per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
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per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
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spin_unlock(&vector_lock);
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unlock_ipi_call_lock();
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unlock_ipi_call_lock();
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@ -879,10 +879,8 @@ int __cpu_disable(void)
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local_irq_disable();
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local_irq_disable();
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remove_siblinginfo(cpu);
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remove_siblinginfo(cpu);
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spin_lock(&vector_lock);
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/* It's now safe to remove this processor from the online map */
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/* It's now safe to remove this processor from the online map */
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cpu_clear(cpu, cpu_online_map);
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cpu_clear(cpu, cpu_online_map);
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spin_unlock(&vector_lock);
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remove_cpu_from_maps();
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remove_cpu_from_maps();
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fixup_irqs(cpu_online_map);
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fixup_irqs(cpu_online_map);
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return 0;
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return 0;
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