diff --git a/include/net/tcp_memcontrol.h b/include/net/tcp_memcontrol.h
index 7df18bc43a97fccef8478436f8f43f3a5553b997..88cdd1cb992ef21c8eb4328549c3e9ed340b0626 100644
--- a/include/net/tcp_memcontrol.h
+++ b/include/net/tcp_memcontrol.h
@@ -14,6 +14,5 @@ struct tcp_memcontrol {
 struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg);
 int tcp_init_cgroup(struct mem_cgroup *memcg, struct cgroup_subsys *ss);
 void tcp_destroy_cgroup(struct mem_cgroup *memcg);
-unsigned long long tcp_max_memory(const struct mem_cgroup *memcg);
 void tcp_prot_mem(struct mem_cgroup *memcg, long val, int idx);
 #endif /* _TCP_MEMCG_H */
diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c
index 559d4ae6ebf4ed32ff80605e3d1b5c3792b1752c..82985d1dc9af17e7d464f6f7efe0c23fb2c3fcf0 100644
--- a/net/ipv4/tcp_memcontrol.c
+++ b/net/ipv4/tcp_memcontrol.c
@@ -226,19 +226,6 @@ static int tcp_cgroup_reset(struct cgroup_subsys_state *css, unsigned int event)
 	return 0;
 }
 
-unsigned long long tcp_max_memory(const struct mem_cgroup *memcg)
-{
-	struct tcp_memcontrol *tcp;
-	struct cg_proto *cg_proto;
-
-	cg_proto = tcp_prot.proto_cgroup((struct mem_cgroup *)memcg);
-	if (!cg_proto)
-		return 0;
-
-	tcp = tcp_from_cgproto(cg_proto);
-	return res_counter_read_u64(&tcp->tcp_memory_allocated, RES_LIMIT);
-}
-
 void tcp_prot_mem(struct mem_cgroup *memcg, long val, int idx)
 {
 	struct tcp_memcontrol *tcp;