2022-01-10 03:02:34

by Yang Li

[permalink] [raw]
Subject: [PATCH -next] ext4: Fix jbd2_journal_shrink_scan() and jbd2_journal_shrink_count() kernel-doc comment

Add the description of @shrink and @sc in jbd2_journal_shrink_scan() and
jbd2_journal_shrink_count() kernel-doc comment to remove warnings found
by running scripts/kernel-doc, which is caused by using 'make W=1'.
fs/jbd2/journal.c:1296: warning: Function parameter or member 'shrink'
not described in 'jbd2_journal_shrink_scan'
fs/jbd2/journal.c:1296: warning: Function parameter or member 'sc' not
described in 'jbd2_journal_shrink_scan'
fs/jbd2/journal.c:1320: warning: Function parameter or member 'shrink'
not described in 'jbd2_journal_shrink_count'
fs/jbd2/journal.c:1320: warning: Function parameter or member 'sc' not
described in 'jbd2_journal_shrink_count'

Reported-by: Abaci Robot <[email protected]>
Signed-off-by: Yang Li <[email protected]>
---
fs/jbd2/journal.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index f13d548e4a7f..951e6382a884 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1287,6 +1287,8 @@ static int jbd2_min_tag_size(void)

/**
* jbd2_journal_shrink_scan()
+ * @shrink: A callback you can register to apply pressure to ageable caches.
+ * @sc: pass information from page reclaim to the shrinkers.
*
* Scan the checkpointed buffer on the checkpoint list and release the
* journal_head.
@@ -1312,6 +1314,8 @@ static unsigned long jbd2_journal_shrink_scan(struct shrinker *shrink,

/**
* jbd2_journal_shrink_count()
+ * @shrink: A callback you can register to apply pressure to ageable caches.
+ * @sc: pass information from page reclaim to the shrinkers.
*
* Count the number of checkpoint buffers on the checkpoint list.
*/
--
2.20.1.7.g153144c



2022-01-10 11:30:32

by Jan Kara

[permalink] [raw]
Subject: Re: [PATCH -next] ext4: Fix jbd2_journal_shrink_scan() and jbd2_journal_shrink_count() kernel-doc comment

On Mon 10-01-22 11:02:29, Yang Li wrote:
> Add the description of @shrink and @sc in jbd2_journal_shrink_scan() and
> jbd2_journal_shrink_count() kernel-doc comment to remove warnings found
> by running scripts/kernel-doc, which is caused by using 'make W=1'.
> fs/jbd2/journal.c:1296: warning: Function parameter or member 'shrink'
> not described in 'jbd2_journal_shrink_scan'
> fs/jbd2/journal.c:1296: warning: Function parameter or member 'sc' not
> described in 'jbd2_journal_shrink_scan'
> fs/jbd2/journal.c:1320: warning: Function parameter or member 'shrink'
> not described in 'jbd2_journal_shrink_count'
> fs/jbd2/journal.c:1320: warning: Function parameter or member 'sc' not
> described in 'jbd2_journal_shrink_count'
>
> Reported-by: Abaci Robot <[email protected]>
> Signed-off-by: Yang Li <[email protected]>

Thanks for the fix! Just one comment below:

> /**
> * jbd2_journal_shrink_scan()
> + * @shrink: A callback you can register to apply pressure to ageable caches.
> + * @sc: pass information from page reclaim to the shrinkers.
> *
> * Scan the checkpointed buffer on the checkpoint list and release the
> * journal_head.
> @@ -1312,6 +1314,8 @@ static unsigned long jbd2_journal_shrink_scan(struct shrinker *shrink,
>
> /**
> * jbd2_journal_shrink_count()
> + * @shrink: A callback you can register to apply pressure to ageable caches.
> + * @sc: pass information from page reclaim to the shrinkers.
> *
> * Count the number of checkpoint buffers on the checkpoint list.
> */

I think the comments are unnecessarily verbose and not really helping much.
Maybe just something like:

* @shrink: shrinker to work on
* @sc: reclaim request to process

Honza

--
Jan Kara <[email protected]>
SUSE Labs, CR