[Yaffs] mkyaffs is broken on 2.6.18

Hi list,

I found mkyaffs is broken on 2.6.18, here is the log on my side,

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root:~> uname -a
Linux  2.6.18-ADI-2007R1-pre #34 Mon Nov 20 18:23:11 CST 2006 blackfin unknown
root:~> cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00800000 00001000 "ROMfs"
mtd1: 00400000 00020000 "linux kernel"
mtd2: 04000000 00020000 "file system"
root:~> mkyaffs -e /dev/mtd1
argc 3 sh 0 optcnt 2
MEMSETOOBSEL: Inappropriate ioctl for device
root:~>
===================

Did I miss anything?

-Aubrey