Re: [PATCH 1/1] drm/i915: remove unused IO_TLB_SEGPAGES which should be defined by swiotlb

[Chris Wilson]

Quoting Dongli Zhang (2019-05-21 05:40:39)
> This patch removes IO_TLB_SEGPAGES which is no longer used since
> commit 5584f1b1d73e ("drm/i915: fix i915 running as dom0 under Xen").
> 
> As the define of both IO_TLB_SEGSIZE and IO_TLB_SHIFT are from swiotlb,
> IO_TLB_SEGPAGES should be defined on swiotlb side if it is required in the
> future.

It would be wise to refer to

commit 5584f1b1d73e9cc95092734c316e467c6c4468f9
Author: Juergen Gross <jgross@xxxxxxxx>
Date:   Thu Feb 2 10:47:11 2017 +0100

    drm/i915: fix i915 running as dom0 under Xen

so the reader can have the history to trawl through.

References: 5584f1b1d73e ("drm/i915: fix i915 running as dom0 under Xen")
> Signed-off-by: Dongli Zhang <dongli.zhang@xxxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris