On Tue Jan 05 2021, Randy Dunlap wrote:
> Fix build errors when LEDS_CLASS=m and NET_DSA_HIRSCHMANN_HELLCREEK=y.
> This limits the latter to =m when LEDS_CLASS=m.
>
> microblaze-linux-ld: drivers/net/dsa/hirschmann/hellcreek_ptp.o: in function `hellcreek_ptp_setup':
> (.text+0xf80): undefined reference to `led_classdev_register_ext'
> microblaze-linux-ld: (.text+0xf94): undefined reference to `led_classdev_register_ext'
> microblaze-linux-ld: drivers/net/dsa/hirschmann/hellcreek_ptp.o: in function `hellcreek_ptp_free':
> (.text+0x1018): undefined reference to `led_classdev_unregister'
> microblaze-linux-ld: (.text+0x1024): undefined reference to `led_classdev_unregister'
>
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Reported-by: kernel test robot <lkp@intel.com>
> Link: lore.kernel.org/r/202101060655.iUvMJqS2-lkp@intel.com
> Cc: Kurt Kanzenbach <kurt@linutronix.de>
> Cc: netdev@vger.kernel.org
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>

Fixes: 7d9ee2e8ff15 ("net: dsa: hellcreek: Add PTP status LEDs")
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>

Thanks,
Kurt