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Message-ID: <20070406214150.GA3545@linux-os.sc.intel.com> Date: Fri, 6 Apr 2007 14:41:50 -0700 From: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@...el.com> To: Linux Kernel <linux-kernel@...r.kernel.org> Cc: akpm@...l.org Subject: Avoid checking for cpu gone when CONFIG_HOTPLUG_CPU not defined Subject: Avoid checking for cpu gone when CONFIG_HOTPLUG_CPU not defined 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> --- arch/i386/kernel/smp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: work/arch/i386/kernel/smp.c =================================================================== --- work.orig/arch/i386/kernel/smp.c +++ work/arch/i386/kernel/smp.c @@ -365,10 +365,12 @@ static void flush_tlb_others(cpumask_t c 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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