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/?id=ade10c0487ed86092bc4a2ee117664e8b71fedfc
        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@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/dumpstack.c:37:6: warning: variable 'type' set but not used [-Wunused-but-set-variable]
           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;
  > 37		int type    = STACK_TYPE_TASK;
    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