[jirislaby:devel 6680/7219] lib/stackdepot.c:154:2: warning: ignoring return value of 'kstrtobool', declared with attribute warn_unused_result

[jirislaby:devel 6680/7219] lib/stackdepot.c:154:2: warning: ignoring return value of 'kstrtobool', declared with attribute warn_unused_result

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel
head:   13ed719c8f2410b973d1579af04a9469c52cc193
commit: b9779abb09a8fea27845516ac093cabd012a697c [6680/7219] lib: stackdepot: add support to disable stack depot
config: arc-randconfig-r026-20210129 (attached as .config)
compiler: arc-elf-gcc (GCC) 9.3.0
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/jirislaby/linux.git/commit/?id=b9779abb09a8fea27845516ac093cabd012a697c
        git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git
        git fetch --no-tags jirislaby devel
        git checkout b9779abb09a8fea27845516ac093cabd012a697c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 

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 >>):

   lib/stackdepot.c: In function 'is_stack_depot_disabled':
>> lib/stackdepot.c:154:2: warning: ignoring return value of 'kstrtobool', declared with attribute warn_unused_result [-Wunused-result]
     154 |  kstrtobool(str, &stack_depot_disable);
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/kstrtobool +154 lib/stackdepot.c

   151	
   152	static int __init is_stack_depot_disabled(char *str)
   153	{
 > 154		kstrtobool(str, &stack_depot_disable);
   155		if (stack_depot_disable) {
   156			pr_info("Stack Depot is disabled\n");
   157			stack_table = NULL;
   158		}
   159		return 0;
   160	}
   161	early_param("stack_depot_disable", is_stack_depot_disabled);
   162	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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