[root@WL500G:/]# insmod rtcdrv.o
rtcdrv.o: kernel-module version mismatch
rtcdrv.o was compiled for kernel version 2.4.5
while this kernel is version 2.4.20.
[root@WL500G:/]# insmod -f rtcdrv.o
Warning: kernel-module version mismatch
rtcdrv.o was compiled for kernel version 2.4.5
while this kernel is version 2.4.20
Warning: loading rtcdrv.o will taint the kernel: no license
See
http://www.tux.org/lkml/#export-tainted for information about tainted modules
Warning: loading rtcdrv.o will taint the kernel: forced load
Module rtcdrv loaded, with warnings
[root@WL500G:/]# mknod /dev/rtc c 12 0
[root@WL500G:/]# cat /dev/rtc
20ff:7f:ff:ff:ff:ff:ff[root@WL500G:/]#