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>
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 @@
/*
* 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 @@
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;