--- Sharath <sharath_75@yahoo.com> wrote: > yes that is true.. even in 2.4.28 but where is > memcpy_tofs(...) first defined.. > > I do not want to include 'other' headers just cause I > have to.. or has anyone writeen a module that copies > from kernel space to user space.. and how to do it.. > > TIA > Sharath > See Rubini & Corbet on-line at http://www.xml.com/ldd/chapter/book/ch03.html#t8 The above link is into the middle of a discussion on their "scull" char driver (the code for which is also available online, poke around the link). Following is an excerpt from the above link: "The code for read and writein scull needs to copy a whole segment of data to or from the user address space. This capability is offered by the following kernel functions, which copy an arbitrary array of bytes and sit at the heart of every read and write implementation: unsigned long copy_to_user(void *to, const void *from, unsigned long count); unsigned long copy_from_user(void *to, const void *from, unsigned long count);" Harmony, --Christine __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
