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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>
This commit is contained in:
Glauber Costa 2008-03-03 14:13:04 -03:00 committed by Ingo Molnar
parent 70708a18e8
commit fc25da9ec6
1 changed files with 1 additions and 3 deletions
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4
arch/x86/kernel/smpboot_64.c
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@ -261,9 +261,9 @@ void __cpuinit start_secondary(void)
/*
* Allow the master to continue.
*/
spin_unlock(&vector_lock);
cpu_set(smp_processor_id(), cpu_online_map);
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
spin_unlock(&vector_lock);
unlock_ipi_call_lock();
@ -879,10 +879,8 @@ int __cpu_disable(void)
local_irq_disable();
remove_siblinginfo(cpu);
spin_lock(&vector_lock);
/* It's now safe to remove this processor from the online map */
cpu_clear(cpu, cpu_online_map);
spin_unlock(&vector_lock);
remove_cpu_from_maps();
fixup_irqs(cpu_online_map);
return 0;