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[]; }; /* _
