tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git kspp/memcpy/next-20210618/v0
head:   fd2aa2a169de8bde9502e7a2fc48cd03d4bfd996
commit: 245fccabb5777708f67afa04fc6b99a3f794986f [54/82] lib/string: Move helper functions out of string.c
config: s390-randconfig-s032-20210618 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id=245fccabb5777708f67afa04fc6b99a3f794986f
        git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
        git fetch --no-tags kees kspp/memcpy/next-20210618/v0
        git checkout 245fccabb5777708f67afa04fc6b99a3f794986f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=s390 

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

All warnings (new ones prefixed by >>):

   In file included from arch/s390/boot/string.c:7:
>> arch/s390/boot/../lib/string.c:11: warning: "__NO_FORTIFY" redefined
      11 | #define __NO_FORTIFY
         | 
   <command-line>: note: this is the location of the previous definition


vim +/__NO_FORTIFY +11 arch/s390/boot/../lib/string.c

  > 11	#define __NO_FORTIFY
    12	

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