Convert hpfs to new aops.

Signed-off-by: Nick Piggin <npiggin@suse.de>

Index: linux-2.6/fs/hpfs/file.c
===================================================================
--- linux-2.6.orig/fs/hpfs/file.c
+++ linux-2.6/fs/hpfs/file.c
@@ -86,25 +86,33 @@ static int hpfs_writepage(struct page *p
 {
 	return block_write_full_page(page,hpfs_get_block, wbc);
 }
+
 static int hpfs_readpage(struct file *file, struct page *page)
 {
 	return block_read_full_page(page,hpfs_get_block);
 }
-static int hpfs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
-{
-	return cont_prepare_write(page,from,to,hpfs_get_block,
-		&hpfs_i(page->mapping->host)->mmu_private);
+
+static int hpfs_write_begin(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned flags,
+			struct page **pagep, void **fsdata)
+{
+	*pagep = NULL;
+	return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+				hpfs_get_block,
+				&hpfs_i(mapping->host)->mmu_private);
 }
+
 static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)
 {
 	return generic_block_bmap(mapping,block,hpfs_get_block);
 }
+
 const struct address_space_operations hpfs_aops = {
 	.readpage = hpfs_readpage,
 	.writepage = hpfs_writepage,
 	.sync_page = block_sync_page,
-	.prepare_write = hpfs_prepare_write,
-	.commit_write = generic_commit_write,
+	.write_begin = hpfs_write_begin,
+	.write_end = generic_write_end,
 	.bmap = _hpfs_bmap
 };