[kbuild-all] Re: [ebiederm-user-namespace:signal-for-v5.17 4/12] arch/x86/kernel/dumpstack.o: warning: objtool: oops_end() falls through to next function show_opcodes()

On 12/15/21 01:29, Eric W. Biederman wrote: > kernel test robot <lkp(a)intel.com&gt; writes: > >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git signal-for-v5.17 >> head: 6b1248798eb6f6d5285db214299996ecc5dc1e6b >> commit: 0e25498f8cd43c1b5aa327f373dd094e9a006da7 [4/12] exit: Add and use make_task_dead. >> config: x86_64-randconfig-a011-20211213 (https://download.01.org/0day-ci/archive/20211214/202112140949.Uq5sFKR1-lk...) >> 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/ebiederm/user-namespace.g... >> git remote add ebiederm-user-namespace https://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git >> git fetch --no-tags ebiederm-user-namespace signal-for-v5.17 >> git checkout 0e25498f8cd43c1b5aa327f373dd094e9a006da7 >> # save the config file to linux build tree >> mkdir build_dir >> make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ kernel/ lib/kunit/ >> >> 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 >>): >> >>>> lib/kunit/kunit-example-test.o: warning: objtool: .text.unlikely: unexpected end of section >> -- >>>> arch/x86/kernel/dumpstack.o: warning: objtool: oops_end() falls through to next function show_opcodes() > I am confused. This change patches objtool to rename > rewind_stack_and_do_exit to rewind_stack_and_make_dead in the list > global_noreturns in tools/objtool/check.c > > There is no other change to oops_end other than that renaming. > > Did the robot somehow mange to run an old version of objtool while > building and this get this error? > > I tried and I am not currently able to reproduce this error. Do you > have any additional pointers on how I might reproduce this? Hi Eric, The reproduce step in report based on a full build, I can reproduce the warnings with the below command:   make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash