[tip:objtool/core 22/23] kernel/sched/build_policy.o: warning: objtool: do_idle() falls through to next function cpu_startup_entry()

[tip:objtool/core 22/23] kernel/sched/build_policy.o: warning: objtool: do_idle() falls through to next function cpu_startup_entry()

[kernel test robot]

CC: linux-kernel@vger.kernel.org
CC: x86@kernel.org
TO: Josh Poimboeuf <jpoimboe@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git objtool/core
head:   fb799447ae2974a07907906dff5bd4b9e47b7123
commit: 071c44e4278156f18a6a56958617223b6bffa6ab [22/23] sched/idle: Mark arch_cpu_idle_dead() __noreturn
config: x86_64-randconfig-a002-20230403 (https://download.01.org/0day-ci/archive/20230408/202304080536.WJdtDBwF-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/tip/tip.git/commit/?id=071c44e4278156f18a6a56958617223b6bffa6ab
        git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip objtool/core
        git checkout 071c44e4278156f18a6a56958617223b6bffa6ab
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/

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/202304080536.WJdtDBwF-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/sched/build_policy.o: warning: objtool: do_idle() falls through to next function cpu_startup_entry()

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests