ntfs3: stop using write_cache_pages

Patch series "remove write_cache_pages()".

Kill off write_cache_pages() after converting the last two users to the
iterator.


This patch (of 3):

Stop using the obsolete write_cache_pages and use writeback_iter directly.

Link: https://lkml.kernel.org/r/[e-mail]
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Christoph Hellwig <[e-mail]>
Cc: Kent Overstreet <[e-mail]>
Cc: Konstantin Komarov <[e-mail]>
Cc: Matthew Wilcox (Oracle) <[e-mail]>
Cc: David Hildenbrand <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

fs/ntfs3/inode.c

···
 }
 
 static int ntfs_resident_writepage(struct folio *folio,
-				   struct writeback_control *wbc, void *data)
+				   struct writeback_control *wbc)
 {
-	struct address_space *mapping = data;
+	struct address_space *mapping = folio->mapping;
 	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
 	int ret;
···
 	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
 		return -EIO;
 
-	if (is_resident(ntfs_i(inode)))
-		return write_cache_pages(mapping, wbc, ntfs_resident_writepage,
-					 mapping);
+	if (is_resident(ntfs_i(inode))) {
+		struct folio *folio = NULL;
+		int error;
+
+		while ((folio = writeback_iter(mapping, wbc, folio, &error)))
+			error = ntfs_resident_writepage(folio, wbc);
+		return error;
+	}
 	return mpage_writepages(mapping, wbc, ntfs_get_block);
 }