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authorKeshavamurthy, Anil S <anil.s.keshavamurthy@intel.com>2007-05-02 19:27:18 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:18 +0200
commite8a72ffa3aa618fb25b5727c0e0ae939d30d66c0 (patch)
treef4e3cf88e1c11ad2ea4c4f3ca1f2db651c811d57
parent141a892f57972b01891df7036f567a70459c19ac (diff)
[PATCH] i386: 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@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>
-rw-r--r--arch/i386/kernel/smp.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c
index f8667109db1..f98c3ffd6fc 100644
--- a/arch/i386/kernel/smp.c
+++ b/arch/i386/kernel/smp.c
@@ -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(!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