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

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Date:   Wed, 04 Jan 2017 21:29:37 +0200
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Daniel Vetter <daniel@...ll.ch>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     kbuild test robot <fengguang.wu@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [PATCH] drm: nouveau: fix build when LEDS_CLASS=m

On Wed, 04 Jan 2017, Daniel Vetter <daniel@...ll.ch> wrote:
> On Sun, Jan 01, 2017 at 04:20:53PM -0800, Randy Dunlap wrote:
>> From: Randy Dunlap <rdunlap@...radead.org>
>> 
>> 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@...radead.org>
>> Reported-by: kbuild test robot <fengguang.wu@...el.com>
>> Cc: Martin Peres <martin.peres@...e.fr>
>> Cc: Ben Skeggs <bskeggs@...hat.com>
>
> Thrown into drm-misc, thanks.

Randy, this results in the following recursive dependency using the
attached config.

BR,
Jani.

drivers/usb/Kconfig:39:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/usb/Kconfig:39:	symbol USB is selected by MOUSE_APPLETOUCH
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/input/mouse/Kconfig:187:	symbol MOUSE_APPLETOUCH depends on INPUT
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/input/Kconfig:8:	symbol INPUT is selected by VT
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/tty/Kconfig:12:	symbol VT is selected by FB_STI
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/video/fbdev/Kconfig:678:	symbol FB_STI depends on FB
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/video/fbdev/Kconfig:5:	symbol FB is selected by DRM_KMS_FB_HELPER
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/Kconfig:72:	symbol DRM_KMS_FB_HELPER is selected by DRM_KMS_CMA_HELPER
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/Kconfig:128:	symbol DRM_KMS_CMA_HELPER is selected by DRM_HDLCD
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/arm/Kconfig:6:	symbol DRM_HDLCD depends on COMMON_CLK
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/clk/Kconfig:9:	symbol COMMON_CLK is selected by X86_INTEL_QUARK
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
arch/x86/Kconfig:554:	symbol X86_INTEL_QUARK depends on X86_PLATFORM_DEVICES
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/platform/x86/Kconfig:5:	symbol X86_PLATFORM_DEVICES is selected by DRM_NOUVEAU
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/nouveau/Kconfig:1:	symbol DRM_NOUVEAU depends on LEDS_CLASS
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/leds/Kconfig:16:	symbol LEDS_CLASS is selected by ATH9K_HTC
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/net/wireless/ath/ath9k/Kconfig:158:	symbol ATH9K_HTC depends on USB
warning: (DRM_NOUVEAU && DRM_I915 && DRM_GMA500) selects ACPI_VIDEO which has unmet direct dependencies (ACPI && X86 && BACKLIGHT_CLASS_DEVICE && INPUT)

> -Daniel
>
>> ---
>>  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
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@...ts.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Jani Nikula, Intel Open Source Technology Center

View attachment ".config" of type "text/plain" (129587 bytes)

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