[Intel-gfx] [PATCH i-g-t v2 1/2] lib/i915: Add helper for copying engine maps from one context to another

[Chris Wilson]

Quoting Tvrtko Ursulin (2020-01-24 12:28:33)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> We also need to support copying across file descriptors.
> 
> v2:
>  * Copy over even if src is unset. (Chris)
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Sreedhar Telukuntla <sreedhar.telukuntla at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris