There's no reason why those functions shouldn't be static.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
        return 0;
 }
 
-int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
+static int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
 {
        struct az6007_device_state *state = d_to_priv(d);
        int ret;
        .functionality = az6007_i2c_func,
 };
 
-int az6007_identify_state(struct dvb_usb_device *d, const char **name)
+static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
 {
        int ret;
        u8 *mac;