[PATH 1/4] drm: Add Virtual DRM device driver

[kernel test robot]

Hi Tomohito,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on drm-intel/for-linux-next drm-tip/drm-tip linus/master v5.13-rc7 next-20210618]
[cannot apply to pinchartl-media/drm/du/next]
[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/Tomohito-Esaki/Support-virtual-DRM/20210621-144611
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-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/236425f4ac8488c7db1f37fc3e2b80626b2a2517
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tomohito-Esaki/Support-virtual-DRM/20210621-144611
        git checkout 236425f4ac8488c7db1f37fc3e2b80626b2a2517
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 

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 >>):

>> scripts/Makefile.build:44: drivers/gpu/drm/vdrm/Makefile: No such file or directory
>> make[5]: *** No rule to make target 'drivers/gpu/drm/vdrm/Makefile'.
   make[5]: Failed to remake makefile 'drivers/gpu/drm/vdrm/Makefile'.


vim +44 scripts/Makefile.build

20a468b51325b3 Sam Ravnborg   2006-01-22  40  
2a691470345a00 Sam Ravnborg   2005-07-25  41  # The filename Kbuild has precedence over Makefile
db8c1a7b2ca25f Sam Ravnborg   2005-07-27  42  kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
0c53c8e6eb456c Sam Ravnborg   2007-10-14  43  kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
0c53c8e6eb456c Sam Ravnborg   2007-10-14 @44  include $(kbuild-file)
^1da177e4c3f41 Linus Torvalds 2005-04-16  45  

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