arch/x86/kernel/alternative.o: warning: objtool: apply_retpolines()+0x35: unreachable instruction

arch/x86/kernel/alternative.o: warning: objtool: apply_retpolines()+0x35: unreachable instruction

[kernel test robot]

CC: linux-kernel@vger.kernel.org
TO: Peter Zijlstra <peterz@infradead.org>
CC: Borislav Petkov <bp@suse.de>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d58071a8a76d779eedab38033ae4c821c30295a5
commit: 7508500900814d14e2e085cdc4e28142721abbdf x86/alternative: Implement .retpoline_sites support
date:   5 weeks ago
config: x86_64-randconfig-r035-20211128 (https://download.01.org/0day-ci/archive/20211129/202111291954.4m2PDgAv-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5c64d8ef8cc0c0ed3e0f2ae693d99e7f70f20a84)
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/torvalds/linux.git/commit/?id=7508500900814d14e2e085cdc4e28142721abbdf
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 7508500900814d14e2e085cdc4e28142721abbdf
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/ block// crypto// drivers/ fs// kernel// mm// net/ sound/

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/x86/kernel/alternative.o: warning: objtool: apply_retpolines()+0x35: unreachable instruction

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

arch/x86/kernel/alternative.o: warning: objtool: apply_retpolines()+0x35: unreachable instruction

[kernel test robot]

CC: linux-kernel@vger.kernel.org
TO: Peter Zijlstra <peterz@infradead.org>
CC: Borislav Petkov <bp@suse.de>

Hi Peter,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd8c917a56f20f48748dd43d9ae3caff51d5b987
commit: 7508500900814d14e2e085cdc4e28142721abbdf x86/alternative: Implement .retpoline_sites support
date:   6 weeks ago
config: x86_64-randconfig-r035-20211128 (https://download.01.org/0day-ci/archive/20211207/202112071705.8kYsBmuj-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5c64d8ef8cc0c0ed3e0f2ae693d99e7f70f20a84)
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/torvalds/linux.git/commit/?id=7508500900814d14e2e085cdc4e28142721abbdf
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 7508500900814d14e2e085cdc4e28142721abbdf
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/ block// crypto// drivers/ fs// kernel// mm// net/ sound/

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/x86/kernel/alternative.o: warning: objtool: apply_retpolines()+0x35: unreachable instruction

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