Re: [PATCH v7 1/4] mm: hugetlb_vmemmap: introduce CONFIG_HUGETLB_PAGE_HAS_OPTIMIZE_VMEMMAP

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

Hi Muchun,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on hnaz-mm/master]
[also build test ERROR on next-20220414]
[cannot apply to tip/x86/mm masahiroy-kbuild/for-next linus/master v5.18-rc2]
[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/intel-lab-lkp/linux/commits/Muchun-Song/add-hugetlb_optimize_vmemmap-sysctl/20220412-191713
base:   https://github.com/hnaz/linux-mm master
config: s390-randconfig-r025-20220414 (https://download.01.org/0day-ci/archive/20220415/202204151043.JSdPGnod-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 6b7e6ea489f6dd45a9b0da9ac20871560917b9b0)
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 s390 cross compiling tool for clang build
        # apt-get install binutils-s390x-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/bb63a010442d551909f826b4c05bf707a6dff052
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Muchun-Song/add-hugetlb_optimize_vmemmap-sysctl/20220412-191713
        git checkout bb63a010442d551909f826b4c05bf707a6dff052
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 prepare

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>:2:
>> include/linux/kconfig.h:8:10: fatal error: 'generated/autoconf_ext.h' file not found
   #include <generated/autoconf_ext.h>
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.
   make[2]: *** [scripts/Makefile.host:111: arch/s390/tools/gen_facilities] Error 1
   make[2]: Target 'kapi' not remade because of errors.
   make[1]: *** [arch/s390/Makefile:148: archprepare] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:226: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +8 include/linux/kconfig.h

     6	
     7	#ifndef __EXCLUDE_AUTOCONF_EXT_H
   > 8	#include <generated/autoconf_ext.h>
     9	#endif
    10	

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https://01.org/lkp