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In the atomic modesetting path, each driver simply wants to grab a ref to the exclusive fence from a reservation object to store in the incoming drm_plane_state, without doing the whole RCU dance. Since each driver will need to do this, lets make a helper. v2: rename to _rcu instead of _unlocked to be more consistent Signed-off-by: Rob Clark <robdclark@gmail.com> Acked-by: Sumit Semwal <sumit.semwal@linaro.org>