linux-kernel - Re: [drm-drm-misc:drm-misc-next 1/2] hppa-linux-ld: undefined reference to `screen

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Date:   Wed, 21 Jul 2021 16:45:12 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [drm-drm-misc:drm-misc-next 1/2] hppa-linux-ld: undefined
 reference to `screen_info'

Thanks for the report.

On 7/21/21 3:13 PM, kernel test robot wrote:
> tree:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
> head:   8633ef82f101c040427b57d4df7b706261420b94
> commit: d391c58271072d0b0fad93c82018d495b2633448 [1/2] drivers/firmware: move x86 Generic System Framebuffers support
> config: parisc-randconfig-r021-20210720 (attached as .config)
> compiler: hppa-linux-gcc (GCC) 10.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git remote add drm-drm-misc git://anongit.freedesktop.org/drm/drm-misc
>         git fetch --no-tags drm-drm-misc drm-misc-next
>         git checkout d391c58271072d0b0fad93c82018d495b2633448
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=parisc SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    hppa-linux-ld: drivers/firmware/sysfb.o: in function `sysfb_init':
>    (.init.text+0x24): undefined reference to `screen_info'
>>> hppa-linux-ld: (.init.text+0x28): undefined reference to `screen_info'
>

Apparently not all architectures define a screen_info, this was reported for
parisc but it's also true for other arches: arc, m68k, microblaze, openrisc
and s390.

The Kconfig symbol is built when COMPILE_TEST is enabled, but that shouldn't
be done for this reason and instead only built for the arches that need it:

config SYSFB
        bool
        default y
        depends on X86 || ARM || ARM64 || RISCV || COMPILE_TEST

I'll post a patch later. 

Best regards,
-- 
Javier Martinez Canillas
Linux Engineering
Red Hat