[PATCH 36/52] remove vector_lock around cpu_online_map

[Glauber Costa]

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@xxxxxxxxxx>
---
 arch/x86/kernel/smpboot_64.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index 1a59240..ca3a3c5 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;
-- 
1.5.0.6

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