[PATCH 2/2] drm/vgem: use shmem helpers

[kernel test robot]

Hi Daniel,

I love your patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on drm-tip/drm-tip linus/master next-20210223]
[cannot apply to drm/drm-next v5.11]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Vetter/dma-buf-Require-VM_PFNMAP-vma-for-mmap/20210223-190209
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: openrisc-randconfig-r026-20210223 (attached as .config)
compiler: or1k-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
        # https://github.com/0day-ci/linux/commit/5c544c63e333016d58d3e6f4802093906ef5456e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daniel-Vetter/dma-buf-Require-VM_PFNMAP-vma-for-mmap/20210223-190209
        git checkout 5c544c63e333016d58d3e6f4802093906ef5456e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=openrisc 

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

All errors (new ones prefixed by >>):

   or1k-linux-ld: arch/openrisc/kernel/entry.o: in function `_external_irq_handler':
   (.text+0x83c): undefined reference to `printk'
   (.text+0x83c): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `printk'
>> or1k-linux-ld: drivers/gpu/drm/vgem/vgem_drv.o:(.rodata+0x44): undefined reference to `drm_gem_shmem_prime_import_sg_table'
>> or1k-linux-ld: drivers/gpu/drm/vgem/vgem_drv.o:(.rodata+0x4c): undefined reference to `drm_gem_shmem_dumb_create'

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