diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index 2e6593e6c1bd..9baa6296fc95 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -646,14 +646,14 @@ static void usbatm_destroy_instance(struct kref *kref)
 	kfree(instance);
 }
 
-void usbatm_get_instance(struct usbatm_data *instance)
+static void usbatm_get_instance(struct usbatm_data *instance)
 {
 	dbg("%s", __func__);
 
 	kref_get(&instance->refcount);
 }
 
-void usbatm_put_instance(struct usbatm_data *instance)
+static void usbatm_put_instance(struct usbatm_data *instance)
 {
 	dbg("%s", __func__);
 
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 22ad1a5a8f9e..2edf9cabad20 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2843,7 +2843,7 @@ static struct edge_buf *edge_buf_alloc(unsigned int size)
  * Free the buffer and all associated memory.
  */
 
-void edge_buf_free(struct edge_buf *eb)
+static void edge_buf_free(struct edge_buf *eb)
 {
 	if (eb) {
 		kfree(eb->buf_buf);