http://www.ibm.com/developerworks/views/linux/libraryview.jsp?site_id=1&contentarea_by=Linux&sort_by=Date&sort_order=1&start=1&end=3&topic_by=-1&product_by=&type_by=Articles&show_abstract=true&search_by=kernel%20apis, Series of short articles on linux kernel [2.6.27] APIs by Tim Jones