mount floppy/cdrom on diskless PC: "vfsload: Exec format error"

[Rob]

Hi,

I have a diskless PC with a floppy and CDrom drive.
I can create a dos floppy without a problem, but the mount fails:

   # /usr/sbin/fdformat /dev/fd0.1440
   Format 1440K floppy `/dev/fd0.1440'? (y/n): y
   Processing VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV done.
   # /sbin/disklabel -B -r -w /dev/fd0 fd1440
   # /sbin/newfs_msdos /dev/fd0
   /dev/fd0: 2840 sectors in 355 FAT12 clusters (4096 bytes/cluster)
   bps=512 spc=8 res=1 nft=2 rde=512 sec=2880 mid=0xf0 spf=2 spt=18 hds=2 hid=0
   # mount_msdos /dev/fd0c /mnt
   mount_msdos: vfsload(msdos): Exec format error


Same problem occurs for a CDrom:

   # mount -t cd9660 /dev/acd0c /cdrom
   cd9660: vfsload(cd9660): Exec format error

The diskless machine has:
   /modules/msdos.ko
   /modules/cd9660.ko

Probably related to this are these lines in /var/log/messages:
   Mar  6 13:09:33 diskless //kernel: link_elf: symbol s_lock_init undefined


Any ideas what's going wrong here?

Thanks,
Rob.