From: Arjan van de Ven <arjanv@redhat.com>

The patch below adds a few missing put_user()'s to the i810/i830 drm
modules.  Users reported oopses with 4g/4g split in action, and sparse
annotations indeed found the offender in the function in question.  I've
kept the sparse __user annotations since those are generally useful anyway.
 I can't test it myself but a few people reported that the oopses went away
so far.