[intel-tdx:guest-attest 5/6] ./usr/include/misc/tdx.h:38:19: error: expected ':', ',', ';', '}' or '__attribute__' before '__user'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/intel/tdx.git guest-attest
head:   9247fade9db5ae6eb183b2f92fdedb898282376a
commit: 054b22e81e88379a5a8459c19e89a335531c1bdd [5/6] platform/x86: intel_tdx_attest: Add TDX Guest attestation interface driver
config: i386-randconfig-a014 (https://download.01.org/0day-ci/archive/20220401/202204011027.5UDMOzNv-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce (this is a W=1 build):
        # https://github.com/intel/tdx/commit/054b22e81e88379a5a8459c19e89a335531c1bdd
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest-attest
        git checkout 054b22e81e88379a5a8459c19e89a335531c1bdd
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

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 <command-line>:
>> ./usr/include/misc/tdx.h:38:19: error: expected ':', ',', ';', '}' or '__attribute__' before '__user'
      38 |         void *buf __user;
         |                   ^~~~~~

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