Convert fat to new aops.

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

Index: linux-2.6/fs/fat/inode.c
===================================================================
--- linux-2.6.orig/fs/fat/inode.c
+++ linux-2.6/fs/fat/inode.c
@@ -139,19 +139,24 @@ static int fat_readpages(struct file *fi
 	return mpage_readpages(mapping, pages, nr_pages, fat_get_block);
 }
 
-static int fat_prepare_write(struct file *file, struct page *page,
-			     unsigned from, unsigned to)
+static int fat_write_begin(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned flags,
+			struct page **pagep, void **fsdata)
 {
-	return cont_prepare_write(page, from, to, fat_get_block,
-				  &MSDOS_I(page->mapping->host)->mmu_private);
+	*pagep = NULL;
+	return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+				fat_get_block,
+				&MSDOS_I(mapping->host)->mmu_private);
 }
 
-static int fat_commit_write(struct file *file, struct page *page,
-			    unsigned from, unsigned to)
+static int fat_write_end(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned copied,
+			struct page *pagep, void *fsdata)
 {
-	struct inode *inode = page->mapping->host;
-	int err = generic_commit_write(file, page, from, to);
-	if (!err && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
+	struct inode *inode = mapping->host;
+	int err;
+	err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
+	if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
 		inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
 		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
 		mark_inode_dirty(inode);
@@ -200,8 +205,8 @@ static const struct address_space_operat
 	.writepage	= fat_writepage,
 	.writepages	= fat_writepages,
 	.sync_page	= block_sync_page,
-	.prepare_write	= fat_prepare_write,
-	.commit_write	= fat_commit_write,
+	.write_begin	= fat_write_begin,
+	.write_end	= fat_write_end,
 	.direct_IO	= fat_direct_IO,
 	.bmap		= _fat_bmap
 };