ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64 against symbol: do_uaccess_flush in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output

Thursday, 10 June 2021

CC: linux-kernel(a)vger.kernel.org
TO: Nicholas Piggin <npiggin(a)gmail.com&gt;
CC: Michael Ellerman <mpe(a)ellerman.id.au&gt;
CC: Daniel Axtens <dja(a)axtens.net&gt;

Hi Nicholas,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd1245d75ce93b8fd206f4b34eb58bcfe156d5e9
commit: 9a32a7e78bd0cd9a9b6332cbdc345ee5ffd0c5de powerpc/64s: flush L1D after user
accesses
date:   7 months ago
config: powerpc-randconfig-r035-20210610 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
d2012d965d60c3258b3a69d024491698f8aec386)
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...
        git remote add linus
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 9a32a7e78bd0cd9a9b6332cbdc345ee5ffd0c5de
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>):

...
> ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64
against symbol: do_uaccess_flush in readonly segment; recompile object files with -fPIC or
pass '-Wl,-z,notext' to allow text relocations in the output
>> defined in arch/powerpc/kernel/head_64.o
>> referenced by arch/powerpc/kernel/head_64.o:(___ksymtab+do_uaccess_flush+0x0)

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for MTK_SCP
   Depends on REMOTEPROC && (ARCH_MEDIATEK || COMPILE_TEST
   Selected by
   - VIDEO_MEDIATEK_VCODEC && MEDIA_SUPPORT && MEDIA_PLATFORM_SUPPORT
&& V4L_MEM2MEM_DRIVERS && (MTK_IOMMU || COMPILE_TEST && VIDEO_DEV
&& VIDEO_V4L2 && (ARCH_MEDIATEK || COMPILE_TEST

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

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