[Intel-gfx] [PATCH] Revert "drm/i915/gem: Drop relocation slowpath"

[Chris Wilson]

Quoting Maarten Lankhorst (2020-03-17 12:35:46)
> This reverts commit 7dc8f1143778 ("drm/i915/gem: Drop relocation
> slowpath"). We need the slowpath relocation for taking ww-mutex
> inside the page fault handler, and we will take this mutex when
> pinning all objects.

Don't hold an exclusive lock across the relocation path; it's not
required.
-Chris