We get 1 warning about global functions without a declaration in the rtl8xxxu rtl8xxxu_core.c when building with W=1: drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c:898:1: warning: no previous prototype for 'rtl8xxxu_gen1_h2c_cmd' [-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/realtek/rtl8xxxu/rtl8xxxu_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c index 77048db..95b54b8 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -894,7 +894,7 @@ int rtl8xxxu_write_rfreg(struct rtl8xxxu_priv *priv, return retval; } -int +static int rtl8xxxu_gen1_h2c_cmd(struct rtl8xxxu_priv *priv, struct h2c_cmd *h2c, int len) { struct device *dev = &priv->udev->dev; -- 2.7.4