[PATCH 3/6] ntfs3: remove ->writepage

[Christoph Hellwig <hch@lst.de>]

->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.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/ntfs3/inode.c | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index b6dad2da59501b..6b50b6e3237876 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -832,26 +832,6 @@ int ntfs_set_size(struct inode *inode, u64 new_size)
 	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)
 {
@@ -2083,13 +2063,13 @@ const struct inode_operations ntfs_link_inode_operations = {
 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,
 };
 
-- 
2.35.1