ld.lld: error: relocation R_PPC_ADDR16_HI cannot be used against symbol 'init_thread_union'; recompile with -fPIC

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   00c7b5f4ddc5b346df62b757ec73f9357bb452af
commit: ffe74a6dc9bc47c7c1bb8e9a3d017f6bd5496d76 m68knommu: fix ucsimm sparse warnings
date:   1 year, 1 month ago
config: powerpc-randconfig-r016-20230402 (https://download.01.org/0day-ci/archive/20230402/202304020631.WHiXIj5y-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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 powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ffe74a6dc9bc47c7c1bb8e9a3d017f6bd5496d76
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ffe74a6dc9bc47c7c1bb8e9a3d017f6bd5496d76
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304020631.WHiXIj5y-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> ld.lld: error: relocation R_PPC_ADDR16_HI cannot be used against symbol 'init_thread_union'; recompile with -fPIC
   >>> referenced by arch/powerpc/kernel/head_44x.o:(.head.text+0x4E)
--
>> ld.lld: error: relocation R_PPC_ADDR16_LO cannot be used against symbol 'init_thread_union'; recompile with -fPIC
   >>> referenced by arch/powerpc/kernel/head_44x.o:(.head.text+0x52)
--
>> ld.lld: error: relocation R_PPC_ADDR16_HI cannot be used against local symbol; recompile with -fPIC
   >>> defined in arch/powerpc/kernel/head_44x.o
   >>> referenced by arch/powerpc/kernel/head_44x.o:(.head.text+0x1676)
--
>> ld.lld: error: relocation R_PPC_ADDR16_HI cannot be used against local symbol; recompile with -fPIC
   >>> defined in arch/powerpc/kernel/head_44x.o
   >>> referenced by arch/powerpc/kernel/head_44x.o:(.head.text+0x1686)
--
>> ld.lld: error: relocation R_PPC_ADDR16_HI cannot be used against local symbol; recompile with -fPIC
   >>> defined in arch/powerpc/kernel/head_44x.o
   >>> referenced by arch/powerpc/kernel/head_44x.o:(.head.text+0x17DA)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests