> 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.
