[Intel-gfx] [PATCH 4/5] drm: Make HW_LOCK access functions optional.

[Dave Airlie]

>
> Iirc it was in the ddx, and it was actually using the mmap code. Leftovers
> from ums, but unfortunately X crashes if we take them away. If I recall
> correctly nouveau was in staging still, but per Linus staging or not
> doesn't matter when distros are shipping with the code already. I did dig
> out the details way back out of curiosity, but lost them since then again.
> -Daniel

There were two different nouveau problems

a) old libdrm used contexts, it called drmCreateContext and drmDestroyContext
from what I could see.

b) old DDX used DRI1 functions, DRIOpenDRMMaster in the X server
when it wanted to use open, that function added maps with locks
and mapped them.

I get the impression this is case (b).

Dave.