tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/core head: 299b8f1b37da2b189cbc17a22621df9af53ed7b3 commit: ade10c0487ed86092bc4a2ee117664e8b71fedfc [1/2] x86/dumpstack/64: Add guard pages to stack_info config: x86_64-randconfig-c007-20210916 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c8b3d7d6d6de37af68b2f379d0e37304f78e115f) 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/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue x86/core git checkout ade10c0487ed86092bc4a2ee117664e8b71fedfc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 >>): int type = STACK_TYPE_TASK; ^ 1 warning generated. vim +/type +37 arch/x86/kernel/dumpstack.c 31 32 bool noinstr in_task_stack(unsigned long *stack, struct task_struct *task, 33 struct stack_info *info) 34 { 35 void *begin = task_stack_page(task); 36 void *end = begin + THREAD_SIZE; 38 39 if ((void *)stack < begin || (void *)stack >= end) { 40 if (in_stack_guard(stack, begin, end)) { 41 type |= STACK_TYPE_GUARD; 42 goto fill_info; 43 } 44 return false; 45 } 46 47 fill_info: 48 info->type = STACK_TYPE_TASK; 49 info->begin = begin; 50 info->end = end; 51 info->next_sp = NULL; 52 53 return true; 54 } 55 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org