From: Glauber Costa Date: Mon, 3 Mar 2008 17:13:04 +0000 (-0300) Subject: x86: remove vector_lock around cpu_online_map X-Git-Tag: v3.12-rc1~22029^2~450 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fc25da9ec6c910976b76c70f7604a838679f75b2;p=kernel%2Fkernel-generic.git 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 Signed-off-by: Ingo Molnar --- 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;