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| author |   Keshavamurthy, Anil S <anil.s.keshavamurthy@intel.com> | 2007-05-02 19:27:18 +0200 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:18 +0200 |
| commit | e8a72ffa3aa618fb25b5727c0e0ae939d30d66c0 (patch) | |
| tree | f4e3cf88e1c11ad2ea4c4f3ca1f2db651c811d57 /arch/i386 | |
| parent | [PATCH] x86-64: move __vgetcpu_mode & __jiffies to the vsyscall_2 zone (diff) | |
| download | linux-dev-e8a72ffa3aa618fb25b5727c0e0ae939d30d66c0.tar.xz linux-dev-e8a72ffa3aa618fb25b5727c0e0ae939d30d66c0.zip | |
[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>
Diffstat (limited to '')
| -rw-r--r-- | arch/i386/kernel/smp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c index f8667109db1c..f98c3ffd6fc3 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 |