#include <linux/fs.h> // Needed by filp
How to use Kernel Mode Linux
To enable Kernel Mode Linux, say Y in Kernel Mode Linux field of kernel configuration, build and install the kernel, and reboot. Then, all executables under directory /trusted are executed in kernel mode in current Kernel Mode Linux implementation. For example, to execute a program named "cat" in kernel mode, copy the program to directory /trusted and execute it as follows (if the /trusted directory does not exist, mkdir it first):
% /trusted/cat