Re: [PATCH] drm: nouveau: fix build when LEDS_CLASS=m

[Ilia Mirkin]

On Wed, Jan 4, 2017 at 3:45 AM, Daniel Vetter <daniel@xxxxxxxx> wrote:
> On Sun, Jan 01, 2017 at 04:20:53PM -0800, Randy Dunlap wrote:
>> From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
>>
>> Fix build errors in nouveau driver when CONFIG_LEDS_CLASS=m and
>> CONFIG_DRM_NOUVEAU=y.
>> If LEDS_CLASS is enabled, DRM_NOUVEAU is restricted to the same
>> kconfig value as LEDS_CLASS.
>>
>> drivers/built-in.o: In function `nouveau_do_suspend':
>> nouveau_drm.c:(.text+0x2030b1): undefined reference to `nouveau_led_suspend'
>> drivers/built-in.o: In function `nouveau_do_resume':
>> nouveau_drm.c:(.text+0x2034ca): undefined reference to `nouveau_led_resume'
>> drivers/built-in.o: In function `nouveau_drm_unload':
>> nouveau_drm.c:(.text+0x203a15): undefined reference to `nouveau_led_fini'
>> drivers/built-in.o: In function `nouveau_drm_load':
>> nouveau_drm.c:(.text+0x204423): undefined reference to `nouveau_led_init'
>>
>> BTW, this line in Kbuild:
>> nouveau-$(CONFIG_LEDS_CLASS) += nouveau_led.o
>> does nothing when CONFIG_LEDS_CLASS=m and CONFIG_DRM_NOUVEAU=y.
>>
>> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
>> Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
>> Cc: Martin Peres <martin.peres@xxxxxxx>
>> Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
>
> Thrown into drm-misc, thanks.
> -Daniel

Wasn't there already a different solution from Martin for this, using
IS_REACHABLE, instead of adding a dependency in Kconfig?

>
>> ---
>>  drivers/gpu/drm/nouveau/Kconfig |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> --- lnx-410-rc2.orig/drivers/gpu/drm/nouveau/Kconfig
>> +++ lnx-410-rc2/drivers/gpu/drm/nouveau/Kconfig
>> @@ -1,6 +1,7 @@
>>  config DRM_NOUVEAU
>>       tristate "Nouveau (NVIDIA) cards"
>>       depends on DRM && PCI
>> +     depends on LEDS_CLASS || LEDS_CLASS=n
>>          select FW_LOADER
>>       select DRM_KMS_HELPER
>>       select DRM_TTM
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>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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