[Nouveau] [PATCH] drm/nouveau/gem: Use vmemdup_user() rather than duplicating its implementation

[kernel test robot]

Hi Markus,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip tegra-drm/drm/tegra/for-next linus/master drm/drm-next drm-exynos/exynos-drm-next v5.8 next-20200812]
[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/Markus-Elfring/drm-nouveau-gem-Use-vmemdup_user-rather-than-duplicating-its-implementation/20200812-150757
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-c002-20200811 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

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


coccinelle warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/nouveau/nouveau_gem.c:589:9-16: WARNING: ERR_CAST can be used with mem

Please review and possibly fold the followup patch.

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