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Subjectundefined reference to `start_isolate_page_range'
Hi Michal,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9cb1fd0efd195590b828b9b865421ad345a4a145
commit: 2602276d3d3811b1a48c48113042cd75fcbfc27d microblaze: Wire CMA allocator
date: 4 months ago
config: microblaze-randconfig-r026-20200524 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0
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 checkout 2602276d3d3811b1a48c48113042cd75fcbfc27d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

microblaze-linux-ld: mm/page_alloc.o: in function `alloc_contig_range':
>> (.text+0xd6d0): undefined reference to `start_isolate_page_range'
microblaze-linux-ld: (.text+0xd944): undefined reference to `test_pages_isolated'
microblaze-linux-ld: (.text+0xd9fc): undefined reference to `undo_isolate_page_range'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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