2.4.21-pre1: cannot load af-packet as module on Athlon

# insmod /lib/modules/2.4.21-pre1/kernel/net/packet/af_packet.o
/lib/modules/2.4.21-pre1/kernel/net/packet/af_packet.o: unresolved symbol _mmx_memcpy
/lib/modules/2.4.21-pre1/kernel/net/packet/af_packet.o: unresolved symbol sk_run_filter

Kernel is compiled for an Athlon SMP. Configuration available at http://www.cs.wm.edu/~lowekamp/tmp/2.4.21-pre1-modules

Bruce