12:52 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
head: 00c9626f46bece739cb413d1399ead6473809c54
commit: ea57e6e833a234ebe22efbb68e31c252f2478d15 [138/150] btrfs: add a
btrfs_get_dev_args_from_path helper
config: hexagon-randconfig-r041-20211014 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project
6c76d0101193aa4eb891a6954ff047eda2f9cf71)
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/kdave/linux.git/commit/?i...
git remote add kdave
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git
git fetch --no-tags kdave for-next
git checkout ea57e6e833a234ebe22efbb68e31c252f2478d15
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> fs/btrfs/volumes.c:2334: warning: This comment starts with
'/**', but isn't a kernel-doc comment. Refer
Documentation/doc-guide/kernel-doc.rst
* Populate args from device at path
vim +2334 fs/btrfs/volumes.c
2332
2333 /**
2334 * Populate args from device at path
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