nilfs2: correct return value kernel-doc descriptions for the rest

Similar to the previous changes to fix return value descriptions, this
fixes the format of the return value descriptions of functions for the
rest.

Link: https://lkml.kernel.org/r/20250110010530.21872-6-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: "Brian G ." <gissf1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: konis

fs/nilfs2/gcinode.c

@@ -46,14 +46,11 @@
  * specified by @pbn to the GC pagecache with the key @blkoff.
  * This function sets @vbn (@pbn if @vbn is zero) in b_blocknr of the buffer.
  *
- * Return Value: On success, 0 is returned. On Error, one of the following
- * negative error code is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-ENOENT - The block specified with @pbn does not exist.
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-EIO	- I/O error (including metadata corruption).
+ * * %-ENOENT	- The block specified with @pbn does not exist.
+ * * %-ENOMEM	- Insufficient memory available.
  */
 int nilfs_gccache_submit_read_data(struct inode *inode, sector_t blkoff,
 				   sector_t pbn, __u64 vbn,
@@ -114,12 +111,11 @@ int nilfs_gccache_submit_read_data(struct inode *inode, sector_t blkoff,
  * specified by @vbn to the GC pagecache.  @pbn can be supplied by the
  * caller to avoid translation of the disk block address.
  *
- * Return Value: On success, 0 is returned. On Error, one of the following
- * negative error code is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-EIO	- I/O error (including metadata corruption).
+ * * %-ENOENT	- Invalid virtual block address.
+ * * %-ENOMEM	- Insufficient memory available.
  */
 int nilfs_gccache_submit_read_node(struct inode *inode, sector_t pbn,
 				   __u64 vbn, struct buffer_head **out_bh)

fs/nilfs2/inode.c

@@ -598,10 +598,7 @@ struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino,
  * or does nothing if the inode already has it.  This function allocates
  * an additional inode to maintain page cache of B-tree nodes one-on-one.
  *
- * Return Value: On success, 0 is returned. On errors, one of the following
- * negative error code is returned.
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: 0 on success, or %-ENOMEM if memory is insufficient.
  */
 int nilfs_attach_btree_node_cache(struct inode *inode)
 {
@@ -660,11 +657,8 @@ void nilfs_detach_btree_node_cache(struct inode *inode)
  * in one inode and the one for b-tree node pages is set up in the
  * other inode, which is attached to the former inode.
  *
- * Return Value: On success, a pointer to the inode for data pages is
- * returned. On errors, one of the following negative error code is returned
- * in a pointer type.
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: a pointer to the inode for data pages on success, or %-ENOMEM
+ * if memory is insufficient.
  */
 struct inode *nilfs_iget_for_shadow(struct inode *inode)
 {

fs/nilfs2/recovery.c

@@ -754,18 +754,13 @@ static void nilfs_abort_roll_forward(struct the_nilfs *nilfs)
  * @sb: super block instance
  * @ri: pointer to a nilfs_recovery_info struct to store search results.
  *
- * Return Value: On success, 0 is returned.  On error, one of the following
- * negative error code is returned.
- *
- * %-EINVAL - Inconsistent filesystem state.
- *
- * %-EIO - I/O error
- *
- * %-ENOSPC - No space left on device (only in a panic state).
- *
- * %-ERESTARTSYS - Interrupted.
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-EINVAL		- Inconsistent filesystem state.
+ * * %-EIO		- I/O error.
+ * * %-ENOMEM		- Insufficient memory available.
+ * * %-ENOSPC		- No space left on device (only in a panic state).
+ * * %-ERESTARTSYS	- Interrupted.
  */
 int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
 			      struct super_block *sb,
@@ -830,14 +825,11 @@ int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
  * segment pointed by the superblock.  It sets up struct the_nilfs through
  * this search. It fills nilfs_recovery_info (ri) required for recovery.
  *
- * Return Value: On success, 0 is returned.  On error, one of the following
- * negative error code is returned.
- *
- * %-EINVAL - No valid segment found
- *
- * %-EIO - I/O error
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-EINVAL	- No valid segment found.
+ * * %-EIO	- I/O error.
+ * * %-ENOMEM	- Insufficient memory available.
  */
 int nilfs_search_super_root(struct the_nilfs *nilfs,
 			    struct nilfs_recovery_info *ri)

fs/nilfs2/segbuf.c

@@ -406,12 +406,7 @@ static int nilfs_segbuf_submit_bh(struct nilfs_segment_buffer *segbuf,
  * @segbuf: buffer storing a log to be written
  * @nilfs: nilfs object
  *
- * Return Value: On Success, 0 is returned. On Error, one of the following
- * negative error code is returned.
- *
- * %-EIO - I/O error
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: Always 0.
  */
 static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
 			      struct the_nilfs *nilfs)
@@ -452,10 +447,7 @@ static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
  * nilfs_segbuf_wait - wait for completion of requested BIOs
  * @segbuf: segment buffer
  *
- * Return Value: On Success, 0 is returned. On Error, one of the following
- * negative error code is returned.
- *
- * %-EIO - I/O error
+ * Return: 0 on success, or %-EIO if I/O error is detected.
  */
 static int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf)
 {

fs/nilfs2/segment.c

@@ -191,12 +191,10 @@ static int nilfs_prepare_segment_lock(struct super_block *sb,
  * When @vacancy_check flag is set, this function will check the amount of
  * free space, and will wait for the GC to reclaim disk space if low capacity.
  *
- * Return Value: On success, 0 is returned. On error, one of the following
- * negative error code is returned.
- *
- * %-ENOMEM - Insufficient memory available.
- *
- * %-ENOSPC - No space left on device
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-ENOMEM	- Insufficient memory available.
+ * * %-ENOSPC	- No space left on device (if checking free space).
  */
 int nilfs_transaction_begin(struct super_block *sb,
 			    struct nilfs_transaction_info *ti,
@@ -2314,18 +2312,13 @@ static void nilfs_segctor_wakeup(struct nilfs_sc_info *sci, int err, bool force)
  * nilfs_construct_segment - construct a logical segment
  * @sb: super block
  *
- * Return Value: On success, 0 is returned. On errors, one of the following
- * negative error code is returned.
- *
- * %-EROFS - Read only filesystem.
- *
- * %-EIO - I/O error
- *
- * %-ENOSPC - No space left on device (only in a panic state).
- *
- * %-ERESTARTSYS - Interrupted.
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-EIO		- I/O error (including metadata corruption).
+ * * %-ENOMEM		- Insufficient memory available.
+ * * %-ENOSPC		- No space left on device (only in a panic state).
+ * * %-ERESTARTSYS	- Interrupted.
+ * * %-EROFS		- Read only filesystem.
  */
 int nilfs_construct_segment(struct super_block *sb)
 {
@@ -2349,18 +2342,13 @@ int nilfs_construct_segment(struct super_block *sb)
  * @start: start byte offset
  * @end: end byte offset (inclusive)
  *
- * Return Value: On success, 0 is returned. On errors, one of the following
- * negative error code is returned.
- *
- * %-EROFS - Read only filesystem.
- *
- * %-EIO - I/O error
- *
- * %-ENOSPC - No space left on device (only in a panic state).
- *
- * %-ERESTARTSYS - Interrupted.
- *
- * %-ENOMEM - Insufficient memory available.
+ * Return: 0 on success, or one of the following negative error codes on
+ * failure:
+ * * %-EIO		- I/O error (including metadata corruption).
+ * * %-ENOMEM		- Insufficient memory available.
+ * * %-ENOSPC		- No space left on device (only in a panic state).
+ * * %-ERESTARTSYS	- Interrupted.
+ * * %-EROFS		- Read only filesystem.
  */
 int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode,
 				  loff_t start, loff_t end)

fs/nilfs2/the_nilfs.c

@@ -49,8 +49,8 @@ void nilfs_set_last_segment(struct the_nilfs *nilfs,
  * alloc_nilfs - allocate a nilfs object
  * @sb: super block instance
  *
- * Return Value: On success, pointer to the_nilfs is returned.
- * On error, NULL is returned.
+ * Return: a pointer to the allocated nilfs object on success, or NULL on
+ * failure.
  */
 struct the_nilfs *alloc_nilfs(struct super_block *sb)
 {
@@ -200,8 +200,7 @@ static int nilfs_store_log_cursor(struct the_nilfs *nilfs,
  * exponent information written in @sbp and stores it in @blocksize,
  * or aborts with an error message if it's too large.
  *
- * Return Value: On success, 0 is returned. If the block size is too
- * large, -EINVAL is returned.
+ * Return: 0 on success, or %-EINVAL if the block size is too large.
  */
 static int nilfs_get_blocksize(struct super_block *sb,
 			       struct nilfs_super_block *sbp, int *blocksize)
@@ -538,7 +537,7 @@ static int nilfs_valid_sb(struct nilfs_super_block *sbp)
  * area, or if the parameters themselves are not normal, it is
  * determined to be invalid.
  *
- * Return Value: true if invalid, false if valid.
+ * Return: true if invalid, false if valid.
  */
 static bool nilfs_sb2_bad_offset(struct nilfs_super_block *sbp, u64 offset)
 {
@@ -684,8 +683,7 @@ static int nilfs_load_super_block(struct the_nilfs *nilfs,
  * reading the super block, getting disk layout information, initializing
  * shared fields in the_nilfs).
  *
- * Return Value: On success, 0 is returned. On error, a negative error
- * code is returned.
+ * Return: 0 on success, or a negative error code on failure.
  */
 int init_nilfs(struct the_nilfs *nilfs, struct super_block *sb)
 {