Hi Cristina Rivera, > I need some help with printk. Well, I'm trying to obtain what is containing > a kernel structure that I've created. It has two fields that are unsigned > long and I need to know if they have the value that the user is passing to > the kernel through a system call. Did u use get_user to obtain the user provided value. I'm sure u used that one... If not, try with get_user. :) Regards, Shine Mohamed Jabbar -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/