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mm/vmstat: simplify the array size calculation

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We can replace the array_num * sizeof(array[0]) with sizeof(array) to
simplify the code.

Link: https://lkml.kernel.org/r/20210715122911.15700-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2021-09-02 15:01:05 -07:00 committed by Linus Torvalds
parent ea15ba17b4
commit 64632fd3eb
1 changed files with 3 additions and 5 deletions
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8
mm/vmstat.c
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@ -1891,17 +1891,15 @@ static bool need_update(int cpu)
/*
* The fast way of checking if there are any vmstat diffs.
*/
if (memchr_inv(pzstats->vm_stat_diff, 0, NR_VM_ZONE_STAT_ITEMS *
sizeof(pzstats->vm_stat_diff[0])))
if (memchr_inv(pzstats->vm_stat_diff, 0, sizeof(pzstats->vm_stat_diff)))
return true;
if (last_pgdat == zone->zone_pgdat)
continue;
last_pgdat = zone->zone_pgdat;
n = per_cpu_ptr(zone->zone_pgdat->per_cpu_nodestats, cpu);
if (memchr_inv(n->vm_node_stat_diff, 0, NR_VM_NODE_STAT_ITEMS *
sizeof(n->vm_node_stat_diff[0])))
return true;
if (memchr_inv(n->vm_node_stat_diff, 0, sizeof(n->vm_node_stat_diff)))
return true;
}
return false;
}