diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 02599b8b6bd5..5dc103a98e74 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4433,8 +4433,7 @@ static void mem_cgroup_stat_aggregate(struct aggregate_control *ac)
 }
 
 #ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC
-static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
-			    int cpu)
+static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent)
 {
 	int nid;
 
@@ -4485,8 +4484,7 @@ static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
 	}
 }
 #else
-static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
-			    int cpu)
+static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent)
 {}
 #endif
 
@@ -4498,7 +4496,7 @@ static void mem_cgroup_css_rstat_flush(struct cgroup_subsys_state *css, int cpu)
 	struct aggregate_control ac;
 	int nid;
 
-	flush_nmi_stats(memcg, parent, cpu);
+	flush_nmi_stats(memcg, parent);
 
 	statc = per_cpu_ptr(memcg->vmstats_percpu, cpu);