+ ntfs3-remove-writepage.patch added to mm-unstable branch

+ ntfs3-remove-writepage.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: ntfs3: remove ->writepage
has been added to the -mm mm-unstable branch.  Its filename is
     ntfs3-remove-writepage.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ntfs3-remove-writepage.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: remove ->writepage
Date: Thu, 29 Dec 2022 06:10:28 -1000

->writepage is a very inefficient method to write back data, and only used
through write_cache_pages or a a fallback when no ->migrate_folio method
is present.

Set ->migrate_folio to the generic buffer_head based helper, and remove
the ->writepage implementation.

Link: https://lkml.kernel.org/r/20221229161031.391878-4-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-remove-writepage
+++ a/fs/ntfs3/inode.c
@@ -826,26 +826,6 @@ out:
 	return err;
 }
 
-static int ntfs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	struct address_space *mapping = page->mapping;
-	struct inode *inode = mapping->host;
-	struct ntfs_inode *ni = ntfs_i(inode);
-	int err;
-
-	if (is_resident(ni)) {
-		ni_lock(ni);
-		err = attr_data_write_resident(ni, page);
-		ni_unlock(ni);
-		if (err != E_NTFS_NONRESIDENT) {
-			unlock_page(page);
-			return err;
-		}
-	}
-
-	return block_write_full_page(page, ntfs_get_block, wbc);
-}
-
 static int ntfs_resident_writepage(struct page *page,
 		struct writeback_control *wbc, void *data)
 {
@@ -1946,13 +1926,13 @@ const struct inode_operations ntfs_link_
 const struct address_space_operations ntfs_aops = {
 	.read_folio	= ntfs_read_folio,
 	.readahead	= ntfs_readahead,
-	.writepage	= ntfs_writepage,
 	.writepages	= ntfs_writepages,
 	.write_begin	= ntfs_write_begin,
 	.write_end	= ntfs_write_end,
 	.direct_IO	= ntfs_direct_IO,
 	.bmap		= ntfs_bmap,
 	.dirty_folio	= block_dirty_folio,
+	.migrate_folio	= buffer_migrate_folio,
 	.invalidate_folio = block_invalidate_folio,
 };
 
_

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