I' ve seen two posts already about this problem.

http://marc.theaimsgroup.com/?l=linux-kernel&m=105261659817753&w=2
and
http://marc.theaimsgroup.com/?l=linux-kernel&m=105268220018813&w=2


depmod: *** Unresolved symbols in 
/lib/modules/2.4.21-rc2-ac1/kernel/drivers/sound/ac97_codec.o
depmod:         wolfson_init11
depmod:         wolfson_init05



I've attached my .config too. Maybe it will help...

Cheers,
Gutko