diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index 24310e9..911b4cc 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -145,9 +145,13 @@
 	return block_read_full_page(page, bfs_get_block);
 }
 
-static int bfs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
+static int bfs_write_begin(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned flags,
+			struct page **pagep, void **fsdata)
 {
-	return block_prepare_write(page, from, to, bfs_get_block);
+	*pagep = NULL;
+	return block_write_begin(file, mapping, pos, len, flags,
+					pagep, fsdata, bfs_get_block);
 }
 
 static sector_t bfs_bmap(struct address_space *mapping, sector_t block)
@@ -159,8 +163,8 @@
 	.readpage	= bfs_readpage,
 	.writepage	= bfs_writepage,
 	.sync_page	= block_sync_page,
-	.prepare_write	= bfs_prepare_write,
-	.commit_write	= generic_commit_write,
+	.write_begin	= bfs_write_begin,
+	.write_end	= generic_write_end,
 	.bmap		= bfs_bmap,
 };