linux-kernel - [PATCH 2/2][next] mm: memcontrol: Use the preferred form for passing the size of a structure type

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Date:   Fri, 31 Jul 2020 12:13:14 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: [PATCH 2/2][next] mm: memcontrol: Use the preferred form for passing
 the size of a structure type

Use the preferred form for passing the size of a structure type. The
alternative form where the structure type is spelled out hurts
readability and introduces an opportunity for a bug when the object
type is changed but the corresponding object identifier to which the
sizeof operator is applied is not.

Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 mm/memcontrol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index bd7f972ceea4..bd0f56785841 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4255,7 +4255,7 @@ static int __mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
 	new->entries[size - 1].threshold = threshold;
 
 	/* Sort thresholds. Registering of new threshold isn't time-critical */
-	sort(new->entries, size, sizeof(struct mem_cgroup_threshold),
+	sort(new->entries, size, sizeof(*new->entries),
 			compare_thresholds, NULL);
 
 	/* Find current threshold */
-- 
2.27.0