tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-4.14.y
head:   9bbf62a7196364dfe558da71592663b1431cad66
commit: 369e65def1a82aba54b377b6899b1bb5099ef838 [3640/4550] Revert "x86/speculation: Change FILL_RETURN_BUFFER to work with objtool"
config: x86_64-randconfig-c003-20230515
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=369e65def1a82aba54b377b6899b1bb5099ef838
        git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
        git fetch --no-tags stable linux-4.14.y
        git checkout 369e65def1a82aba54b377b6899b1bb5099ef838
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash LDFLAGS=-z max-page-size=0x200000  arch/x86/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305160133.icOPymfr-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/entry/entry_64.S: Assembler messages:
   arch/x86/entry/entry_64.S:1672: Warning: no instruction mnemonic suffix given and no register operands; using default for `sysret'
>> arch/x86/entry/.tmp_entry_64.o: warning: objtool: .entry.text+0x8a8: unreachable instruction

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