+ mm-vmstat-simplify-the-array-size-calculation.patch added to -mm tree

+ mm-vmstat-simplify-the-array-size-calculation.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/vmstat: simplify the array size calculation
has been added to the -mm tree.  Its filename is
     mm-vmstat-simplify-the-array-size-calculation.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-vmstat-simplify-the-array-size-calculation.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmstat-simplify-the-array-size-calculation.patch

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: 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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmstat.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/mm/vmstat.c~mm-vmstat-simplify-the-array-size-calculation
+++ a/mm/vmstat.c
@@ -1889,17 +1889,15 @@ 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;
 }
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-vmscan-put-the-redirtied-madv_free-pages-back-to-anonymous-lru-list.patch
mm-vmscan-remove-misleading-setting-to-sc-priority.patch
mm-vmscan-remove-unneeded-return-value-of-kswapd_run.patch
mm-vmscan-add-else-to-remove-check_pending-label.patch
mm-vmscan-fix-misleading-comment-in-isolate_lru_pages.patch
mm-vmstat-correct-some-wrong-comments.patch
mm-vmstat-simplify-the-array-size-calculation.patch
mm-vmstat-remove-unneeded-return-value.patch
mm-zsmallocc-close-race-window-between-zs_pool_dec_isolated-and-zs_unregister_migration.patch
mm-zsmallocc-combine-two-atomic-ops-in-zs_pool_dec_isolated.patch