[mark:linkage/alias-rework 5/7] string.c:(.text+0x528): multiple definition of `strchr'; arch/arm64/lib/strchr.o:(.text+0x0): first defined here

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git linkage/alias-rework
head:   869f25744367b7ec5fb196d9c92acadfbfe87419
commit: 3bba704175bd8bcb979b1924d650350a08587257 [5/7] arm64: clean up symbol aliasing
config: arm64-buildonly-randconfig-r004-20211207 (https://download.01.org/0day-ci/archive/20211209/202112090138.feHj3vrq-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id=3bba704175bd8bcb979b1924d650350a08587257
        git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git
        git fetch --no-tags mark linkage/alias-rework
        git checkout 3bba704175bd8bcb979b1924d650350a08587257
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   aarch64-linux-ld: lib/string.o: in function `strchr':
>> string.c:(.text+0x528): multiple definition of `strchr'; arch/arm64/lib/strchr.o:(.text+0x0): first defined here

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