My point is this ioctl will be restricted to one user (Xserver if i
understand) and only this user, there is no fork in it so no need to
worry about fork, just setting the vma as locked will be enough.
But i don't want people reading this driver suddenly think that what
it's doing is ok, it's not, it's hack and can never make to work
properly on a general case, that's why it needs a big comment stating,
stressing that. I just wanted to make sure Inki and Kyungmin
understood that this kind of ioctl should be restricted to carefully
selected user and that there is no way to make it general or reliable
outside that.
first off, I'm not drm guy and then I don't intend to insist you. but if
application don't use fork, get_user_pages() has no downside. I guess we
don't need VM_LOCKED hack.
but again, up to drm folks.
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