usb_optional_function 800 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h u8 usb_optional_function; usb_optional_function 853 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h u8 usb_optional_function; usb_optional_function 14 drivers/net/wireless/realtek/rtw88/rtw8822b.h u8 usb_optional_function;