HelloWorldLKM

A simple example of Linux Kernel Module

$ make
# insmod helloworld.ko
# rmmod helloworld.ko

You will see on dmesg something like:

[ 6519.343791] Hello world!
[ 6525.014934] Cleaning up module.

Interesting related topics:

• http://elinux.org/Deferred_Initcalls
• http://www.tldp.org/LDP/lkmpg/2.4/html/x354.html