I have a character device and some of its functions are being called by ioctl. In a function, I do copy_to_user and copy_from_user to get the user space data in kernel memory. My question is, if this function doesn't sleep, can I avoid calls to copy_to_user and copy_from_user? I am using Linux-2.4.18 Regards Mohanlal -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/