Hi Peter,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on cb0e52b7748737b2cf6481fdd9b920ce7e1ebbdf]

url:    https://github.com/0day-ci/linux/commits/Peter-Oskolkov/sched-mm-x86-uaccess-implement-User-Managed-Concurrency-Groups/20211122-052209
base:   cb0e52b7748737b2cf6481fdd9b920ce7e1ebbdf
config: x86_64-randconfig-c007-20211121 (attached as .config)
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/e455791cacec2b140558a717d2b8b07f5561a251
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Peter-Oskolkov/sched-mm-x86-uaccess-implement-User-Managed-Concurrency-Groups/20211122-052209
        git checkout e455791cacec2b140558a717d2b8b07f5561a251
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   In file included from <built-in>:1:

quoted

./usr/include/linux/umcg.h:80:2: error: unknown type name 'u64'

           u64     state_ts;               /* r/w */
           ^

quoted

./usr/include/linux/umcg.h:91:2: error: unknown type name 'u32'

           u32     next_tid;               /* r   */
           ^
   ./usr/include/linux/umcg.h:93:2: error: unknown type name 'u32'
           u32     flags;                  /* Reserved; must be zero. */
           ^
   ./usr/include/linux/umcg.h:101:2: error: unknown type name 'u64'
           u64     idle_workers_ptr;       /* r/w */
           ^
   ./usr/include/linux/umcg.h:107:2: error: unknown type name 'u64'
           u64     idle_server_tid_ptr;    /* r   */
           ^
   5 errors generated.

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