[kbuild-all] [mhiramat:kprobes/kretprobe-stackfix-v3 5/11] arch/x86/kernel/kprobes/core.o: warning: objtool: kretprobe_trampoline()+0x25: call without frame pointer save/setup

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git kprobes/kretprobe-stackfix-v3 head: 89826b1f814b340c1b78d896da569ff693ab2c51 commit: 240dbe52255834ff0de40f8b4ad4ff8f5d727d0b [5/11] x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline code config: x86_64-randconfig-a012-20210124 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git/commit... git remote add mhiramat https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git git fetch --no-tags mhiramat kprobes/kretprobe-stackfix-v3 git checkout 240dbe52255834ff0de40f8b4ad4ff8f5d727d0b # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org