UIO: Add the User IO core code

This interface allows the ability to write the majority of a driver in
userspace with only a very small shell of a driver in the kernel itself.
It uses a char device and sysfs to interact with a userspace process to
process interrupts and control memory accesses.

See the docbook documentation for more details on how to use this
interface.

From: Hans J. Koch <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Benedikt Spranger <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

6 files changed