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Subject[PATCH 37/54] arch/ia64: replace cpumask_weight with cpumask_weight_eq in mm/tlb.c
Date
__flush_tlb_range() code calls cpumask_weight() to compare the
weight of cpumask with a given number. We can do it more efficiently with
cpumask_weight_eq because conditional cpumask_weight may stop traversing
the cpumask earlier, as soon as condition is met.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
arch/ia64/mm/tlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c
index 135b5135cace..a5bce13ab047 100644
--- a/arch/ia64/mm/tlb.c
+++ b/arch/ia64/mm/tlb.c
@@ -332,7 +332,7 @@ __flush_tlb_range (struct vm_area_struct *vma, unsigned long start,

preempt_disable();
#ifdef CONFIG_SMP
- if (mm != current->active_mm || cpumask_weight(mm_cpumask(mm)) != 1) {
+ if (mm != current->active_mm || !cpumask_weight_eq(mm_cpumask(mm), 1)) {
ia64_global_tlb_purge(mm, start, end, nbits);
preempt_enable();
return;
--
2.30.2
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