[Intel-gfx] [PATCH 2/2] drm/i915: add lockdep_assert_held in i915_ppat_{get, put}

[Chris Wilson]

Quoting Zhi Wang (2017-09-14 18:24:10)
> struct_mutext needs to be held before call these two APIs.

True for the moment. But raises a question of whether introducing a
ppat->mutex would be beneficial? All depends on whether the caller is
already forced to use struct_mutex and is likely to continue to need it
next year...
-Chris