[jirislaby:devel 91/112] mm/slab_common.o: warning: objtool: kmem_cache_create_usercopy()+0x258: unreachable instruction

[jirislaby:devel 91/112] mm/slab_common.o: warning: objtool: kmem_cache_create_usercopy()+0x258: unreachable instruction

[kernel test robot]

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TO: Jiri Slaby <jslaby@suse.cz>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel
head:   ff75e57b27b6cf90fbebcb0681615ed4954b5123
commit: d4ce445a2556b3fd92d5702e39802d2ef1caeff0 [91/112] include condition in the BUG_ON/WARN_ON output
config: x86_64-randconfig-a013-20210602 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project db26cd30b6dd65e88d786e97a1e453af5cd48966)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git/commit/?id=d4ce445a2556b3fd92d5702e39802d2ef1caeff0
        git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git
        git fetch --no-tags jirislaby devel
        git checkout d4ce445a2556b3fd92d5702e39802d2ef1caeff0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>):

>> mm/slab_common.o: warning: objtool: kmem_cache_create_usercopy()+0x258: unreachable instruction

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

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