Mapping Kernel memory to user space

[Jonathan P. Leech]

	We are running 4.2 on a 780. Recently our system manager implemented
a device driver which uses statically allocated RAM to emulate a frame buffer.
This works fine, but it would be nice to remove the overhead of system calls
on each read/write to the 'frame buffer'. Can anyone tell me how to make kernel
memory read and writeable from a normal process?
	Thanks,
	Jon Leech
	jon at cit-vax