Problem cmopiling kernel version 2.4.21

I configured my kernel using make xconfig and ran make: I got these error messages at the end:

make[1]: Leaving directory `/root/linux-2.4.21/arch/i386/lib'

ld -m elf_i386 -T /root/linux-2.4.21/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o init/do_mounts.o \
      --start-group \
      arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o 

mm/mm.o fs/fs.o ipc/ipc.o \
drivers/parport/driver.o drivers/char/char.o
drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/char/agp/agp.o drivers/char/drm/drm.o
drivers/ide/idedriver.o drivers/scsi/scsidrv.o drivers/cdrom/driver.o drivers/sound/sounddrivers.o drivers/pci/driver.o drivers/pnp/pnp.o drivers/video/video.o

drivers/block/paride/paride.a drivers/usb/usbdrv.o drivers/media/media.o drivers/input/inputdrv.o \
      net/network.o \
      /root/linux-2.4.21/arch/i386/lib/lib.a 
/root/linux-2.4.21/lib/lib.a /root/linux-2.4.21/arch/i386/lib/lib.a \
      --end-group \
      -o vmlinux

drivers/char/drm/drm.o(.text+0x18328): In function `sis_fb_alloc':
: undefined reference to sis_malloc' drivers/char/drm/drm.o(.text+0x183d6): In function sis_fb_alloc':
: undefined reference to sis_free' drivers/char/drm/drm.o(.text+0x18449): In function sis_fb_free':
: undefined reference to sis_free' drivers/char/drm/drm.o(.text+0x1887f): In function sis_final_context':
: undefined reference to `sis_free'
make: *** [vmlinux] Error 1
[root@server linux-2.4.21]#