[Intel-gfx] [PATCH 2/2] drm/i915/pmu: Only allow running on a single CPU

[Chris Wilson]

Quoting Tvrtko Ursulin (2017-11-23 12:34:32)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> We do two things, both of which are purely to simplify and clarify the
> implementation:
> 
> 1.
> 
> Simplify the CPU online callback so it is more obvious that the purpose
> there is to set a single CPU mask bit for the first CPU which comes
> online. Using cpumask_weight for this reads more obvious than the trick
> with cpumask_and_any.
> 
> 2.
> 
> Modify the event init so that events can be created only on a single CPU.
> 
> This removes looking at the requested CPU thread siblings, and only allows
> creating on the current active CPU.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Dmitry Rogozhkin <dmitry.v.rogozhkin at intel.com>

Works for me.
Tested-by: Chris Wilson <chris at chris-wilson.co.uk>

As much as I understand this (which is not a lot!),
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris