tree:   git://linuxtv.org/pinchartl/media.git drm/du/devel/gem/highmem
head:   59fe227659a0be1fa4dfcd99391a5db867efcf47
commit: 695541dad6cead7dfc84df9558c8cdfaddcc7426 [15/26] media: vimc: Add support for contiguous DMA buffers
config: microblaze-randconfig-r022-20210730 (attached as .config)
compiler: microblaze-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 pinchartl-media git://linuxtv.org/pinchartl/media.git
        git fetch --no-tags pinchartl-media drm/du/devel/gem/highmem
        git checkout 695541dad6cead7dfc84df9558c8cdfaddcc7426
        # 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=microblaze SHELL=/bin/bash

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: drivers/media/test-drivers/vimc/vimc-capture.o: in function `vimc_cap_add':
>> drivers/media/test-drivers/vimc/.tmp_gl_vimc-capture.o:(.text+0x9f8): undefined reference to `vb2_dma_contig_memops'

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