post_install() {
    # get latest installed kernel version. not the running one.
    _kernver="$(basename `ls -dlt /usr/lib/modules/[2-4]* | head -n 1 | cut -d '/' -f 2-`)"
    depmod ${_kernver}
}

post_upgrade() {
    post_install
}

post_remove() {
    post_install
}