tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f40ddce88593482919761f74910f42f4b84c004b commit: 9b80e4c4ddaca3501177ed41e49d0928ba2122a8 overflow: Add __must_check attribute to check_*() helpers date: 4 months ago config: powerpc64-randconfig-r024-20210220 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b80e4c4ddaca3501177ed41e49d0928ba2122a8 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 9b80e4c4ddaca3501177ed41e49d0928ba2122a8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All warnings (new ones prefixed by >>): lib/test_overflow.c:92:1: warning: unused variable 'u64_tests' [-Wunused-const-variable] DEFINE_TEST_ARRAY(u64) = { ^ lib/test_overflow.c:22:4: note: expanded from macro 'DEFINE_TEST_ARRAY' } t ## _tests[] __initconst ^ <scratch space>:170:1: note: expanded from here u64_tests ^ lib/test_overflow.c:189:1: warning: unused variable 's64_tests' [-Wunused-const-variable] DEFINE_TEST_ARRAY(s64) = { ^ lib/test_overflow.c:22:4: note: expanded from macro 'DEFINE_TEST_ARRAY' } t ## _tests[] __initconst ^ <scratch space>:182:1: note: expanded from here s64_tests ^ >> lib/test_overflow.c:291:19: warning: stack frame size of 1968 bytes in >> function 'test_overflow_shift' [-Wframe-larger-than=] static int __init test_overflow_shift(void) ^ 3 warnings generated. vim +/test_overflow_shift +291 lib/test_overflow.c 8fee81aa459848 Kees Cook 2018-05-09 290 d36b6ad27c7b95 Kees Cook 2018-08-01 @291 static int __init test_overflow_shift(void) d36b6ad27c7b95 Kees Cook 2018-08-01 292 { d36b6ad27c7b95 Kees Cook 2018-08-01 293 int err = 0; d36b6ad27c7b95 Kees Cook 2018-08-01 294 :::::: The code at line 291 was first introduced by commit :::::: d36b6ad27c7b95e3f6bfbf6ea33757c8e8accf01 test_overflow: Add shift overflow tests :::::: TO: Kees Cook <keesc...@chromium.org> :::::: CC: Jason Gunthorpe <j...@mellanox.com> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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