On Wed, 2006-08-23 at 17:56 -0700, Manisha Maheshwari wrote: > > I have mapped a device '/dev/nds/surface3 ' into user address > space.That's the mapping which i see in /proc/self/maps. > --- > 298a4000-298f9000 rw-s 00000000 00:0b 58425601 /dev/nds/surface3 > -- > later on when user give that user address '298a4000' to another > device ( this device doesn't know the physical address for this user > space address).This second device need to convert that user address to > kernel address so that it can write to the corresponding kernel space. > > I don't wanna do copy_from_user or copy_to_user becoz it's a big chunk > of memory.Moreover this is already allocated in kernel and i wanna > work on the same chunk of memory. I suspect that at this point showing us the sourcecode is going to be the only way we can really understand what you are trying to do and/or making useful suggestions... -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
