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Subject: Re: undefined reference to `start_isolate_page_range'
To:     kernel test robot <lkp@intel.com>, Michal Simek <monstr@monstr.eu>
Cc:     kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
        Christoph Hellwig <hch@lst.de>
References: <202011210906.WVDfrAtS-lkp@intel.com>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <4860e097-f90e-fdf6-454f-514e4a7c3c68@infradead.org>
Date:   Sun, 22 Nov 2020 17:13:45 -0800
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On 11/20/20 5:26 PM, kernel test robot wrote:
> Hi Michal,
> 
> FYI, the error/warning still remains.
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   4ccf7a01e805f04defd423fb410f47a13af76399
> commit: 2602276d3d3811b1a48c48113042cd75fcbfc27d microblaze: Wire CMA allocator
> date:   10 months ago
> config: microblaze-randconfig-s031-20201121 (attached as .config)
> compiler: microblaze-linux-gcc (GCC) 9.3.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # apt-get install sparse
>         # sparse version: v0.6.3-134-gb59dbdaf-dirty
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2602276d3d3811b1a48c48113042cd75fcbfc27d
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 2602276d3d3811b1a48c48113042cd75fcbfc27d
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=microblaze 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    microblaze-linux-ld: mm/page_alloc.o: in function `alloc_contig_range':
>>> (.text+0xa1fc): undefined reference to `start_isolate_page_range'
>>> microblaze-linux-ld: (.text+0xa40c): undefined reference to `test_pages_isolated'
>>> microblaze-linux-ld: (.text+0xa47c): undefined reference to `undo_isolate_page_range'


FTR:  This is a Kconfig problem in drivers/gpu/drm/aspeed/Kconfig
and it is fixed in linux-next and drm-misc-next.

https://lore.kernel.org/dri-devel/20201011230131.4922-1-rdunlap@infradead.org/

-- 
~Randy