Hi Josef,

I love your patch! Perhaps something to improve:

[auto build test WARNING on kvm/linux-next]
[also build test WARNING on linus/master next-20200813]
[cannot apply to hnaz-linux-mm/master hch-configfs/for-next v5.8]
[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/Josef-Bacik/proc-use-vmalloc-for-our-kernel-buffer/20200814-001519
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: s390-randconfig-c004-20200813 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0

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


coccinelle warnings: (new ones prefixed by >>)

>> mm/util.c:198:5-13: WARNING opportunity for vmemdup_user

Please review and possibly fold the followup patch.

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