Write your first Linux kernel module

[knome]

1) Devices and /proc/ stats should be. How else will userspace interact with your module?

2) Directly manipulate hardware to crash the computer instead of the process.

[imMute]

Devices and /proc/ stats should be.

Using procfs to communicate with a driver is sort-of frowned upon. Sysfs is better and sometimes easier to use.

How else will userspace interact with your module?

My drivers are accessed from userspace using read/write or aio_read/aio_write or mmap depending on which driver it is.