--- linux-2.6.22.14/include/linux/mtd/nand.h	2008-01-22 13:56:44.000000000 +0200
+++ linux/include/linux/mtd/nand.h	2008-01-15 10:56:33.000000000 +0200
@@ -399,6 +399,9 @@ struct nand_chip {
 	int		subpagesize;
 	uint8_t		cellinfo;
 	int		badblockpos;
+#ifdef MIPSEL
+	unsigned	backup_offset;
+#endif
 
 	nand_state_t	state;
 
@@ -421,6 +424,9 @@ struct nand_chip {
 	void		*priv;
 };
 
+#define BACKUP_4xFF_OFFSET	36
+#define ALWAYS_4x00_OFFSET	32
+
 /*
  * NAND Flash Manufacturer ID Codes
  */