Hi All, I working on a kernel module and I have been a little bit comfused with Linux memory manager. When a user opens the device,the module stores somewhere user's active_mm pointer.We can assume that only one user can open the device at the same time. When a interrupt comes to my handler, I want to write some data to a page of the user. The interrupt handler has the destination address,and the length of the data that must be copied and of course the data. The problem is that the destination address is from address space of the user. At first,through user's active_mm, I find if the user have access to the memory region that device must write. AFAIK I cannot use copy_to_user function, or something like this, because these functions can used only from the user proccess. So the question is how to "convert" the destination memory address to interrupt handler address space, so the handler can write the data to the correct place. Regards, Stavros Passas -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
