On Tue, Dec 04, 2001 at 10:11:56PM -0800, Amit Purohit wrote: > As the kernel address space in the new linux kernels > spans the entire 0 to 4 GB, still why do we need to do > copy_to_user or copy_from user ? Because we can't be sure that the page is in physical memory. Erik -- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
