On Wed, Jul 14, 2021 at 10:50 PM kernel test robot <lkp@intel.com> wrote:
> I love your patch! Yet something to improve:

> >> ld.lld: error: undefined symbol: devm_led_classdev_register_ext
>    >>> referenced by ht16k33.c
>    >>>               auxdisplay/ht16k33.o:(ht16k33_probe) in archive drivers/built-in.a

Thank you, the driver needs to select LED_CLASS. Will fix in v4.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds