[kbuild-all] [kdave-btrfs-devel:misc-next 100/110] fs/btrfs/sysfs.c:1355:5: warning: no previous prototype for function 'btrfs_sysfs_add_fs_devices'

tree: https://github.com/kdave/btrfs-devel.git misc-next head: 9b50c486dc82ed5ccdbea8b467b0244a57365aad commit: fd8e11fb8ffcb957a87dd0897b2e8c8535167391 [100/110] btrfs: simplify parameters of btrfs_sysfs_add_devices_dir config: x86_64-randconfig-a013-20200909 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout fd8e11fb8ffcb957a87dd0897b2e8c8535167391 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 btrfs_sysfs_add_fs_devices(struct btrfs_fs_devices *fs_devices) ^ fs/btrfs/sysfs.c:1355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int btrfs_sysfs_add_fs_devices(struct btrfs_fs_devices *fs_devices) ^ static 1 warning generated. # https://github.com/kdave/btrfs-devel/commit/fd8e11fb8ffcb957a87dd0897b2e8... git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git git fetch --no-tags kdave-btrfs-devel misc-next git checkout fd8e11fb8ffcb957a87dd0897b2e8c8535167391 vim +/btrfs_sysfs_add_fs_devices +1355 fs/btrfs/sysfs.c 1354 1356 { 1357 int ret; 1358 struct btrfs_device *device; 1359 1360 list_for_each_entry(device, &fs_devices->devices, dev_list) { 1361 ret = btrfs_sysfs_add_device(device); 1362 if (ret) 1363 return ret; 1364 } 1365 1366 return 0; 1367 } 1368 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org