Helo Talib ... > A kernel virtual address is passed to my module. In order to avoid > any chances of a crash, how can I verify this pointer is pointing to > a mapped memory location. One thing that concerns me is, what if the passed pointer is pointing to ZONE_HIGHMEM memory pool?? IIRC, ZONE_HIGHMEM pages aren't statically mapped into the >3 GB virtual address. Thus as a solution, instead of passing address of kernel memory, I suggest to pass the address of related page_struct. Then, from here, you can do kmap(). I hope I give you a correct suggestion, Talib... regards, Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
