tree: https://github.com/kdave/btrfs-devel.git for-next head: 00c9626f46bece739cb413d1399ead6473809c54 commit: ea57e6e833a234ebe22efbb68e31c252f2478d15 [138/150] btrfs: add a btrfs_get_dev_args_from_path helper config: riscv-allyesconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 11.2.0 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://github.com/kdave/btrfs-devel/commit/ea57e6e833a234ebe22efbb68e31c... git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git git fetch --no-tags kdave-btrfs-devel for-next git checkout ea57e6e833a234ebe22efbb68e31c252f2478d15 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=riscv 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 >>): * Populate args from device at path vim +2334 fs/btrfs/volumes.c 2332 2333 /** 2335 * 2336 * @fs_info: the filesystem 2337 * @args: the args to populate 2338 * @path: the path to the device 2339 * 2340 * This will read the super block of the device at @path and populate @args with 2341 * the devid, fsid, and uuid. This is meant to be used for ioctls that need to 2342 * lookup a device to operate on, but need to do it before we take any locks. 2343 * This properly handles the special case of "missing" that a user may pass in, 2344 * and does some basic sanity checks. The caller must make sure that @path is 2345 * properly NUL terminated before calling in, and must call 2346 * btrfs_put_dev_args_from_path() in order to free up the temporary fsid and 2347 * uuid buffers. 2348 * 2349 * Return: 0 for success, -errno for failure 2350 */ 2351 int btrfs_get_dev_args_from_path(struct btrfs_fs_info *fs_info, 2352 struct btrfs_dev_lookup_args *args, 2353 const char *path) 2354 { 2355 struct btrfs_super_block *disk_super; 2356 struct block_device *bdev; 2357 int ret; 2358 2359 if (!path || !path[0]) 2360 return -EINVAL; 2361 if (!strcmp(path, "missing")) { 2362 args->missing = true; 2363 return 0; 2364 } 2365 2366 args->uuid = kzalloc(BTRFS_UUID_SIZE, GFP_KERNEL); 2367 args->fsid = kzalloc(BTRFS_FSID_SIZE, GFP_KERNEL); 2368 if (!args->uuid || !args->fsid) { 2369 btrfs_put_dev_args_from_path(args); 2370 return -ENOMEM; 2371 } 2372 2373 ret = btrfs_get_bdev_and_sb(path, FMODE_READ, fs_info->bdev_holder, 0, 2374 &bdev, &disk_super); 2375 if (ret) 2376 return ret; 2377 args->devid = btrfs_stack_device_id(&disk_super->dev_item); 2378 memcpy(args->uuid, disk_super->dev_item.uuid, BTRFS_UUID_SIZE); 2379 if (btrfs_fs_incompat(fs_info, METADATA_UUID)) 2380 memcpy(args->fsid, disk_super->metadata_uuid, BTRFS_FSID_SIZE); 2381 else 2382 memcpy(args->fsid, disk_super->fsid, BTRFS_FSID_SIZE); 2383 btrfs_release_disk_super(disk_super); 2384 blkdev_put(bdev, FMODE_READ); 2385 return 0; 2386 } 2387 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org