Hi, > char *ptr, *ptr0; > > ptr /= 4*4; > ptr *= 4*4; I'm surprised you can do / and * on char *'s. Ralph. - 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/