Hi Ben,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on pm/linux-next]
[also build test ERROR on driver-core/driver-core-testing linux/master linus/master v5.11-rc3 next-20210111]
[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/Ben-Widawsky/CXL-2-0-Support/20210112-083452
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-r025-20210111 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/08bbe46d8b00e6a4d9c02d7a72b6aec1f2a7583c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Ben-Widawsky/CXL-2-0-Support/20210112-083452
        git checkout 08bbe46d8b00e6a4d9c02d7a72b6aec1f2a7583c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from <built-in>:1:
   ./usr/include/linux/cxl_mem.h:67:2: error: unknown type name '__u32'
           __u32 id;
           ^
   ./usr/include/linux/cxl_mem.h:69:2: error: unknown type name '__u32'
           __u32 flags;
           ^
   ./usr/include/linux/cxl_mem.h:75:2: error: unknown type name '__s32'
           __s32 size_in;
           ^
   ./usr/include/linux/cxl_mem.h:76:2: error: unknown type name '__s32'
           __s32 size_out;
           ^
   ./usr/include/linux/cxl_mem.h:109:2: error: unknown type name '__u32'
           __u32 n_commands;
           ^
   ./usr/include/linux/cxl_mem.h:110:2: error: unknown type name '__u32'
           __u32 rsvd;
           ^
   ./usr/include/linux/cxl_mem.h:136:2: error: unknown type name '__u32'
           __u32 id;
           ^
   ./usr/include/linux/cxl_mem.h:137:2: error: unknown type name '__u32'
           __u32 flags;
           ^
   ./usr/include/linux/cxl_mem.h:138:2: error: unknown type name '__u32'
           __u32 rsvd;
           ^
   ./usr/include/linux/cxl_mem.h:139:2: error: unknown type name '__u32'
           __u32 retval;
           ^
   ./usr/include/linux/cxl_mem.h:142:3: error: unknown type name '__s32'
                   __s32 size_in;
                   ^
>> ./usr/include/linux/cxl_mem.h:143:3: error: unknown type name '__u64'
                   __u64 in_payload;
                   ^
   ./usr/include/linux/cxl_mem.h:147:3: error: unknown type name '__s32'
                   __s32 size_out;
                   ^
   ./usr/include/linux/cxl_mem.h:148:3: error: unknown type name '__u64'
                   __u64 out_payload;
                   ^
   14 errors generated.

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