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authorMiaohe Lin <linmiaohe@huawei.com>2021-09-02 15:01:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 09:58:18 -0700
commit64632fd3eb4611780a1190362f2119d8f2bb5465 (patch)
tree02154b1176d4da1a7e818ed2dc4247c4d3c32c20 /mm/vmstat.c
parentea15ba17b434b7dd7f92bb85b7e5cf53707733ad (diff)
mm/vmstat: simplify the array size calculation
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>
Diffstat (limited to 'mm/vmstat.c')
-rw-r--r--mm/vmstat.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 5bd621eadc48..c4634dc83916 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -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;
}