udf: Use folios in udf_adinicb_writepage()

Make udf_adinicb_writepage() fully converted to using the passed folio
instead of converting it to the page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>

Author: Matthew Wilcox (Oracle)

fs/udf/inode.c

@@ -188,14 +188,14 @@ static void udf_write_failed(struct address_space *mapping, loff_t to)
 static int udf_adinicb_writepage(struct folio *folio,
 				 struct writeback_control *wbc, void *data)
 {
-	struct page *page = &folio->page;
-	struct inode *inode = page->mapping->host;
+	struct inode *inode = folio->mapping->host;
 	struct udf_inode_info *iinfo = UDF_I(inode);
 
-	BUG_ON(!PageLocked(page));
-	memcpy_from_page(iinfo->i_data + iinfo->i_lenEAttr, page, 0,
+	BUG_ON(!folio_test_locked(folio));
+	BUG_ON(folio->index != 0);
+	memcpy_from_file_folio(iinfo->i_data + iinfo->i_lenEAttr, folio, 0,
 		       i_size_read(inode));
-	unlock_page(page);
+	folio_unlock(folio);
 	mark_inode_dirty(inode);
 
 	return 0;