+ ntfs3-stop-using-generic_writepages.patch added to mm-unstable branch

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

The patch titled
     Subject: ntfs3: stop using generic_writepages
has been added to the -mm mm-unstable branch.  Its filename is
     ntfs3-stop-using-generic_writepages.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ntfs3-stop-using-generic_writepages.patch

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

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------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: ntfs3: stop using generic_writepages
Date: Thu, 29 Dec 2022 06:10:27 -1000

Open code the resident inode handling in ntfs_writepages by directly using
write_cache_pages to prepare removing the ->writepage handler in ntfs3.

Link: https://lkml.kernel.org/r/20221229161031.391878-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/fs/ntfs3/inode.c~ntfs3-stop-using-generic_writepages
+++ a/fs/ntfs3/inode.c
@@ -846,12 +846,29 @@ static int ntfs_writepage(struct page *p
 	return block_write_full_page(page, ntfs_get_block, wbc);
 }
 
+static int ntfs_resident_writepage(struct page *page,
+		struct writeback_control *wbc, void *data)
+{
+	struct address_space *mapping = data;
+	struct ntfs_inode *ni = ntfs_i(mapping->host);
+	int ret;
+
+	ni_lock(ni);
+	ret = attr_data_write_resident(ni, page);
+	ni_unlock(ni);
+
+	if (ret != E_NTFS_NONRESIDENT)
+		unlock_page(page);
+	mapping_set_error(mapping, ret);
+	return ret;
+}
+
 static int ntfs_writepages(struct address_space *mapping,
 			   struct writeback_control *wbc)
 {
-	/* Redirect call to 'ntfs_writepage' for resident files. */
 	if (is_resident(ntfs_i(mapping->host)))
-		return generic_writepages(mapping, wbc);
+		return write_cache_pages(mapping, wbc, ntfs_resident_writepage,
+					 mapping);
 	return mpage_writepages(mapping, wbc, ntfs_get_block);
 }
 
_

Patches currently in -mm which might be from hch@lst.de are

fs-remove-an-outdated-comment-on-mpage_writepages.patch
ntfs3-stop-using-generic_writepages.patch
ntfs3-remove-writepage.patch
jbd2ocfs2-move-jbd2_journal_submit_inode_data_buffers-to-ocfs2.patch
ocfs2-use-filemap_fdatawrite_wbc-instead-of-generic_writepages.patch
mm-remove-generic_writepages.patch