Hi, what i meant by vitual memory support is not the VFS but the option in 'make menuconfig->file system ' rather a support for shm fs (tmpfs), it wasnt enabled by default. And also Sys V IPC has been built in to the kernel.I have an entry /proc/sysvipc/ . System.map has got the symbols for the sys_shmget ! But still the problem is not solved. AFAIK when i do a insmod the module tries to resolve the symbols from the exported symbols or look up in System.map ? Thanks nk Erik Mouw wrote: > On Wed, Mar 27, 2002 at 10:28:39AM +0530, karthik wrote: > > I am planning to share data between my kernel driver (module) > > > > and a user program using shared memory. > > That's something most drivers do, or otherwise they're pretty useless :) > > > I am calling sys_shmget in the initialization function of the module.. > > when i insert the module it crybs for unresolved symbol sys_shmget. > > I have Virtual Memory file system support built in kernel(2.4.2) & > > compiled my module with the following options > > -DMODULE -D__KERNEL__ -O2 ... > > Am i missing some of the dependencies ? > > The kernel is always compiled with virtual memory support, or otherwise > it couldn't provide protection. You need to enable SysV IPC. > > However, the easiest way to share data between the kernel and a driver > is to mmap() the device file, so just implement a mmap() method in your > driver and you're done. > > Erik > > -- > J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty > of Information Technology and Systems, Delft University of Technology, > PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 > Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl > WWW: http://www-ict.its.tudelft.nl/~erik/ > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
