Hi, I am trying to write a simple block device driver and test the open call. I am using Slackware with 2.4.20 kernel. The code and the issue is described here: http://www.linuxforum.com/forums/index.php?showtopic=116132 Any ideas on where I am going wrong and how I can get this working is appreciated. Thanks, K Shakthi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/