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Date: Mon, 30 Apr 2007 17:49:52 +0200 (CEST) From: Andi Kleen <ak@...e.de> To: anil.s.keshavamurthy@...el.com, ak@...e.de, ego@...ibm.com, patches@...-64.org, linux-kernel@...r.kernel.org Subject: [PATCH] [20/34] i386: avoid checking for cpu gone when CONFIG_HOTPLUG_CPU not defined From: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@...el.com> Avoid checking for cpu gone in mm hot path when CONFIG_HOTPLUG_CPU is not defined. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com> Signed-off-by: Andi Kleen <ak@...e.de> Cc: Andi Kleen <ak@...e.de> Cc: Gautham R Shenoy <ego@...ibm.com> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> --- arch/i386/kernel/smp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: linux/arch/i386/kernel/smp.c =================================================================== --- linux.orig/arch/i386/kernel/smp.c +++ linux/arch/i386/kernel/smp.c @@ -359,10 +359,12 @@ void native_flush_tlb_others(const cpuma BUG_ON(cpu_isset(smp_processor_id(), cpumask)); BUG_ON(!mm); +#ifdef CONFIG_HOTPLUG_CPU /* If a CPU which we ran on has gone down, OK. */ cpus_and(cpumask, cpumask, cpu_online_map); - if (cpus_empty(cpumask)) + if (unlikely(cpus_empty(cpumask))) return; +#endif /* * i'm not happy about this global shared spinlock in the - 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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