The code for this article is available for download at ftp.linuxjournal.com/pub/lj/listings/issue133/7905.tgz.
Another article on Kprobes can be found here: www-106.ibm.com/developerworks/library/l-kprobes.html
Kprobes Home Page: www-124.ibm.com/developerworks/oss/linux/projects/kprobes
Site for getting the kernel source: www.kernel.org
Instructions on Compiling Extra Modules: lwn.net/Articles/21823
