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Date: Mon, 3 Mar 2008 14:13:04 -0300 From: Glauber Costa <gcosta@...hat.com> To: linux-kernel@...r.kernel.org Cc: akpm@...ux-foundation.org, glommer@...il.com, mingo@...e.hu, tglx@...utronix.de, Glauber Costa <gcosta@...hat.com> Subject: [PATCH 36/52] 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@...hat.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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