drm/nouveau/fb: protect vram mm with private mutex

nvkm_subdev.mutex is going away.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
This commit is contained in:
Ben Skeggs 2020-12-02 16:31:23 +10:00
commit 0e65ec7527
2 changed files with 8 additions and 5 deletions