can't compile 2.1.121 under Debian Hamm 2.0

["James D. Freels" <fea@fea.rrd.ornl.gov>]

Using a typical installation of Debian Hamm 2.0, I am having trouble
compiling the current development kernel.  Can anyone give me a clue
on the following error message:
_____________________________________________________________________

make[2]: Leaving directory `/usr/src/kernel-source-2.1.121/arch/i386/lib'
make[1]: Leaving directory `/usr/src/kernel-source-2.1.121/arch/i386/lib'
ld -m elf_i386 -T /usr/src/kernel-source-2.1.121/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o \
        arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o \
        fs/filesystems.a \
        net/network.a \
        drivers/block/block.a drivers/char/char.a drivers/misc/misc.a drivers/net/net.a drivers/scsi/scsi.a drivers/cdrom/cdrom.a drivers/sound/sound.a drivers/pci/pci.a drivers/pnp/pnp.a drivers/video/video.a \
        /usr/src/kernel-source-2.1.121/arch/i386/lib/lib.a /usr/src/kernel-source-2.1.121/lib/lib.a /usr/src/kernel-source-2.1.121/arch/i386/lib/lib.a \
        -o vmlinux
fs/fs.o: In function `change_root':
fs/fs.o(.text+0x5a17): undefined reference to `initmem_freed'
make: *** [vmlinux] Error 1

___________________________________________________________________

-- 
/------------------------------------------------------------------\
|James D. Freels, P.E._i, Ph.D. |Phone:  (423)576-8645 |   | L | A |
|Oak Ridge National Laboratory  |FAX:    (423)574-9172 | H | I | L |
|Research Reactors Division     |work e-m: fea@ornl.gov| F | N | P |
|P. O. Box 2008                 |home e-m: fea@icx.net | I | U | H |
|Oak Ridge, Tennessee 37831-6392|world's best neutrons | R | X | A |
\------------------------------------------------------------------/