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@xxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx 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
