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-rw-r--r--mm/memcontrol.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4af673350377..33ad13d69bda 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5088,8 +5088,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
return ERR_PTR(error);
memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL,
- 1, MEM_CGROUP_ID_MAX,
- GFP_KERNEL);
+ 1, MEM_CGROUP_ID_MAX + 1, GFP_KERNEL);
if (memcg->id.id < 0) {
error = memcg->id.id;
goto fail;