+ mpage-convert-do_mpage_readpage-to-return-int-type.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mpage: convert do_mpage_readpage() to return int type
has been added to the -mm mm-new branch.  Its filename is
     mpage-convert-do_mpage_readpage-to-return-int-type.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mpage-convert-do_mpage_readpage-to-return-int-type.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
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------------------------------------------------------
From: Chi Zhiling <chizhiling@kylinos.cn>
Subject: mpage: convert do_mpage_readpage() to return int type
Date: Tue, 12 Aug 2025 15:22:25 +0800

The return value of do_mpage_readpage() is arg->bio, which is already set
in the arg structure.  Returning it again is redundant.

This patch changes the return type to int and always returns 0 since the
caller does not care about the return value.

Link: https://lkml.kernel.org/r/20250812072225.181798-3-chizhiling@163.com
Signed-off-by: Chi Zhiling <chizhiling@kylinos.cn>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Sungjong Seo <sj1557.seo@samsung.com>
Cc: Yuezhang Mo <Yuezhang.Mo@sony.com>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/mpage.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/fs/mpage.c~mpage-convert-do_mpage_readpage-to-return-int-type
+++ a/fs/mpage.c
@@ -148,7 +148,7 @@ struct mpage_readpage_args {
  * represent the validity of its disk mapping and to decide when to do the next
  * get_block() call.
  */
-static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
+static int do_mpage_readpage(struct mpage_readpage_args *args)
 {
 	struct folio *folio = args->folio;
 	struct inode *inode = folio->mapping->host;
@@ -297,7 +297,7 @@ alloc_new:
 	else
 		args->last_block_in_bio = first_block + blocks_per_folio - 1;
 out:
-	return args->bio;
+	return 0;
 
 confused:
 	if (args->bio)
@@ -360,7 +360,7 @@ void mpage_readahead(struct readahead_co
 		prefetchw(&folio->flags);
 		args.folio = folio;
 		args.nr_pages = readahead_count(rac);
-		args.bio = do_mpage_readpage(&args);
+		do_mpage_readpage(&args);
 		if (!folio_test_locked(folio) &&
 		    !folio_test_uptodate(folio))
 			break;
@@ -381,7 +381,7 @@ int mpage_read_folio(struct folio *folio
 		.get_block = get_block,
 	};
 
-	args.bio = do_mpage_readpage(&args);
+	do_mpage_readpage(&args);
 	if (args.bio)
 		mpage_bio_submit_read(args.bio);
 	return 0;
_

Patches currently in -mm which might be from chizhiling@kylinos.cn are

mm-filemap-do-not-use-is_partially_uptodate-for-entire-folio.patch
mm-filemap-skip-non-uptodate-folio-if-there-are-available-folios.patch
mpage-terminate-read-ahead-on-read-error.patch
mpage-clean-up-do_mpage_readpage.patch
mpage-convert-do_mpage_readpage-to-return-int-type.patch