Enabling kernel modules at boot time

To maintain persistent kernel module, create a file called 'modulename.modules' in /etc/sysconfig/modules/ and insert corresponding command. For example, to load 'rt3070sta' module, I need to find the location of device 'ra0'. Find it using:

# find / -name 'ra0'
/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/net/ra0

Now, I will add this to rt3070sta.modules:

#!/bin/sh

if [ ! -c /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/net/ra0 ] ; then
        exec /sbin/modprobe rt3070sta >/dev/null 2>&1
fi