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>

1 files changed, 1 insertions, 3 deletions

diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index 1a592400d94f..ca3a3c5b64fe 100644
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -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;