We get 1 warning about global functions without a declaration in the ath9k gpio driver when building with W=1: drivers/net/wireless/ath/ath9k/gpio.c:25:6: warning: no previous prototype for 'ath_fill_led_pin' [-Wmissing-prototypes] In fact, this function is only used in the file in which it is declared and don't need a declaration, but can be made static. so this patch marks it 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@xxxxxxxxxx> --- drivers/net/wireless/ath/ath9k/gpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c index 490f74d..ddb2886 100644 --- a/drivers/net/wireless/ath/ath9k/gpio.c +++ b/drivers/net/wireless/ath/ath9k/gpio.c @@ -22,7 +22,7 @@ #ifdef CONFIG_MAC80211_LEDS -void ath_fill_led_pin(struct ath_softc *sc) +static void ath_fill_led_pin(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; -- 2.7.4