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Subject[djwong-xfs:zero-initialize-pmem-5.16 25/28] fs/iomap/buffered-io.c:943: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git zero-initialize-pmem-5.16
head: 34b80c3d1203abd5fd64242ef25898c7d64166ca
commit: 262459cd3e039d51ed6f6c478e1b794dda7d9de8 [25/28] iomap: use accelerated zeroing on a block device to zero a file range
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/commit/?id=262459cd3e039d51ed6f6c478e1b794dda7d9de8
git remote add djwong-xfs https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git
git fetch --no-tags djwong-xfs zero-initialize-pmem-5.16
git checkout 262459cd3e039d51ed6f6c478e1b794dda7d9de8
# save the attached .config to linux build tree
make W=1 ARCH=um SUBARCH=x86_64

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 >>):

>> fs/iomap/buffered-io.c:943: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Force a filesystem to write zeroes to mapped extents, even if they're
--
>> fs/iomap/buffered-io.c:948:1: warning: no previous prototype for 'iomap_zeroinit_range' [-Wmissing-prototypes]
948 | iomap_zeroinit_range(struct inode *inode, loff_t pos, loff_t len,
| ^~~~~~~~~~~~~~~~~~~~


vim +943 fs/iomap/buffered-io.c

941
942 /**
> 943 * Force a filesystem to write zeroes to mapped extents, even if they're
944 * unwritten. DAX files are not supported, and the caller should fsync the
945 * file before returning to userspace.
946 */
947 int
> 948 iomap_zeroinit_range(struct inode *inode, loff_t pos, loff_t len,
949 const struct iomap_ops *ops)
950 {
951 struct iomap_iter iter = {
952 .inode = inode,
953 .pos = pos,
954 .len = len,
955 .flags = IOMAP_ZERO,
956 };
957 int ret;
958
959 if (IS_DAX(inode))
960 return -EOPNOTSUPP;
961
962 while ((ret = iomap_iter(&iter, ops)) > 0)
963 iter.processed = iomap_zero_iter(&iter, NULL, false);
964 return ret;
965 }
966 EXPORT_SYMBOL_GPL(iomap_zeroinit_range);
967

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