Hi Julien,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on next-20210120]
[cannot apply to arm64/for-next/core linux/master efi/next kbuild/for-next soc/for-next arm/for-next xlnx/master kvmarm/next linus/master v5.11-rc4 v5.11-rc3 v5.11-rc2 v5.11-rc4]
[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/0day-ci/linux/commits/Julien-Thierry/objtool-add-base-support-for-arm64/20210121-031836
base:    647060f3b592d3c8df0c85dd887557b03e6ea897
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/04b2388dbd79126e4cdd6d9c2ffd6313d7f2ef62
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Julien-Thierry/objtool-add-base-support-for-arm64/20210121-031836
        git checkout 04b2388dbd79126e4cdd6d9c2ffd6313d7f2ef62
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

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 >>):

>> arch/arm64/kernel/relocate_kernel.o: warning: objtool: .text+0x1000: can't decode instruction
--
>> arch/arm64/kernel/head.o: warning: objtool: .head.text+0x54: can't decode instruction
--
>> arch/arm64/kernel/entry.o: warning: objtool: .entry.text+0x8e0: can't find call dest symbol at .text+0x14
--
>> arch/arm64/kernel/sigreturn32.o: warning: objtool: .text+0x0: can't decode instruction
--
>> arch/arm64/kernel/kuser32.o: warning: objtool: .text+0x8: can't decode instruction
--
>> arch/arm64/kernel/proton-pack.o: warning: objtool: qcom_link_stack_sanitisation()+0x1c: unannotated intra-function call
--
>> arch/arm64/kernel/sleep.o: warning: objtool: __cpu_suspend_enter()+0x80: call without frame pointer save/setup
>> arch/arm64/kernel/sleep.o: warning: objtool: _cpu_resume()+0x64: call without frame pointer save/setup
--
>> arch/arm64/mm/proc.o: warning: objtool: .idmap.text+0xd8: can't decode instruction
--
>> arch/arm64/crypto/crct10dif-ce-core.o: warning: objtool: crc_t10dif_pmull_p8()+0xf0: unannotated intra-function call
--
>> arch/arm64/crypto/sha256-core.o: warning: objtool: .text+0xeec: can't decode instruction
--
>> arch/arm64/crypto/sha512-core.o: warning: objtool: .text+0x1048: can't decode instruction
..

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