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[PATCH] i386: avoid checking for cpu gone when CONFIG_HOTPLUG_CPU not defined

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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@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Keshavamurthy, Anil S
2007-05-02 19:27:18 +02:00
committed by Andi Kleen
parent 141a892f57
commit e8a72ffa3a
1 changed files with 3 additions and 1 deletions
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4
arch/i386/kernel/smp.c
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@@ -359,10 +359,12 @@ void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
BUG_ON(cpu_isset(smp_processor_id(), cpumask)); BUG_ON(cpu_isset(smp_processor_id(), cpumask));
BUG_ON(!mm); BUG_ON(!mm);
#ifdef CONFIG_HOTPLUG_CPU
/* If a CPU which we ran on has gone down, OK. */ /* If a CPU which we ran on has gone down, OK. */
cpus_and(cpumask, cpumask, cpu_online_map); cpus_and(cpumask, cpumask, cpu_online_map);
if (cpus_empty(cpumask)) if (unlikely(cpus_empty(cpumask)))
return; return;
#endif
/* /*
* i'm not happy about this global shared spinlock in the * i'm not happy about this global shared spinlock in the