block: Improve kernel-doc headers

Fix the documentation of the devt_from_partuuid() return value.

Fix the following two recently introduced kernel-doc warnings:

block/bdev.c:570: warning: Function parameter or member 'hops' not described in 'bd_finish_claiming'
block/early-lookup.c:46: warning: Function parameter or member 'devt' not described in 'devt_from_partuuid'

Cc: Christoph Hellwig <hch@lst.de>
Fixes: 0718afd ("block: introduce holder ops")
Fixes: cf056a4 ("init: improve the name_to_dev_t interface")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230621165054.743815-1-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: bvanassche

block/bdev.c

@@ -561,6 +561,7 @@ static void bd_clear_claiming(struct block_device *whole, void *holder)
  * bd_finish_claiming - finish claiming of a block device
  * @bdev: block device of interest
  * @holder: holder that has claimed @bdev
+ * @hops: block device holder operations
  *
  * Finish exclusive open of a block device. Mark the device as exlusively
  * open by the holder and wake up all waiters for exclusive open to finish.

block/early-lookup.c

@@ -32,6 +32,7 @@ static int __init match_dev_by_uuid(struct device *dev, const void *data)
 /**
  * devt_from_partuuid - looks up the dev_t of a partition by its UUID
  * @uuid_str:	char array containing ascii UUID
+ * @devt:	dev_t result
  *
  * The function will return the first partition which contains a matching
  * UUID value in its partition_meta_info struct.  This does not search
@@ -40,7 +41,7 @@ static int __init match_dev_by_uuid(struct device *dev, const void *data)
  * If @uuid_str is followed by a "/PARTNROFF=%d", then the number will be
  * extracted and used as an offset from the partition identified by the UUID.
  *
- * Returns the matching dev_t on success or 0 on failure.
+ * Returns 0 on success or a negative error code on failure.
  */
 static int __init devt_from_partuuid(const char *uuid_str, dev_t *devt)
 {