[patch 093/192] memcontrol: use flexible-array member

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From: wenhuizhang <wenhui@xxxxxxxxxxxxxx>
Subject: memcontrol: use flexible-array member

Change deprecated zero-length-and-one-element-arrays into flexible array
member.Zero-length and one-element arrays detected by Lukas's CodeChecker.
Zero/one element arrays cause undefined behaviours if sizeof() used.

Link: https://lkml.kernel.org/r/20210518200910.29912-1-wenhui@xxxxxxxxxxxxxx
Signed-off-by: wenhuizhang <wenhui@xxxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Cc: Alex Shi <alexs@xxxxxxxxxx>
Cc: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/linux/memcontrol.h |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/include/linux/memcontrol.h~memcontrol-use-flexible-array-member
+++ a/include/linux/memcontrol.h
@@ -349,8 +349,7 @@ struct mem_cgroup {
 	struct deferred_split deferred_split_queue;
 #endif
 
-	struct mem_cgroup_per_node *nodeinfo[0];
-	/* WARNING: nodeinfo must be the last member here */
+	struct mem_cgroup_per_node *nodeinfo[];
 };
 
 /*
_




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