drm/amdgpu/gpuvm: add some additional comments in amdgpu_vm_update_ptes

To better clarify what is happening in this function.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2019-10-30 13:53:27 -04:00
commit 8863baefaf