bfs: convert to new aops

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/bfs/file.c

@@ -145,9 +145,13 @@ static int bfs_readpage(struct file *file, struct page *page)
 	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 @@ const struct address_space_operations bfs_aops = {
 	.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,
 };