Unresolved symbol prefetch on RH AS2.1

Hi,
I have a custom driver which works on Red Hat 7.2.
The same driver when compiled and inserted on Red Hat Advanced Server (kernel 2.4.9 e-3) gives me the following unresolved symbol error

insmod sddlmadrv.o (This is the custom driver which works on 7.2) sddlmadrv.o: unresolved symbol prefetch

Can anybody tell me what changes need to be done so that the driver could be inserted.

Thanks and Regards
Chandrasekhar

RH-AS is quite different to 7.2 in many ways, kernel wise.

I'd suggest you recompile, your driver against RHAS.

Also, take note of the fops struct which changed in RH-AS.