diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 79285a36035f..847c02b197b0 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -248,7 +248,7 @@ static int update_netprio(const void *v, struct file *file, unsigned n)
 	return 0;
 }
 
-void net_prio_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
+static void net_prio_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
 {
 	struct task_struct *p;
 	void *v;