Hello, Do kernel modules need to be aware that they are running in a 64-bit kernel or a 32-bit kernel? I guess yes, especially interacting with 32-bit userspace programs. For e.g. if a 32-bit program (running on a 64-bit kernel) passes a pointer to the kernel module (via an ioctl), how does the kernel/module know that its a 32-bit address? the sizeof(pointer) changes in kernel/userspace in this case. So in the ioctl handler the kernel modules does how many bytes of copy_from_use() to get the ioctl args? How should be the modules be written so they work both on 32/64-bit kernel AND can interact with both 32/64-bit userspace programs in a 64-bit kernel?? Any links, pointers to relevant HOWTO/docs/source will be very useful. Thanks, A. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
