Hi André, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.11-rc5 next-20240826] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Andr-Almeida/tmpfs-Add-casefold-lookup-support/20240826-135457 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20240823173332.281211-5-andrealmeid%40igalia.com patch subject: [PATCH 4/5] tmpfs: Expose filesystem features via sysfs config: i386-randconfig-063-20240827 (https://download.01.org/0day-ci/archive/20240827/202408270618.4ue8oNhS-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240827/202408270618.4ue8oNhS-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202408270618.4ue8oNhS-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> mm/shmem.c:5515:1: sparse: sparse: symbol 'dev_attr_casefold' was not declared. Should it be static? vim +/dev_attr_casefold +5515 mm/shmem.c 5512 5513 #if defined(CONFIG_SYSFS) && defined(CONFIG_TMPFS) 5514 #if IS_ENABLED(CONFIG_UNICODE) > 5515 DEVICE_STRING_ATTR_RO(casefold, 0444, "supported"); 5516 #endif 5517 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki