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-rw-r--r--block/blk-iocost.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 8ac4aad66ebc..cea5ee9be639 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2045,8 +2045,7 @@ static struct blkg_policy_data *ioc_pd_alloc(gfp_t gfp, struct request_queue *q,
int levels = blkcg->css.cgroup->level + 1;
struct ioc_gq *iocg;
- iocg = kzalloc_node(sizeof(*iocg) + levels * sizeof(iocg->ancestors[0]),
- gfp, q->node);
+ iocg = kzalloc_node(struct_size(iocg, ancestors, levels), gfp, q->node);
if (!iocg)
return NULL;