[PATCH v3 05/12] drm/ttm: Expose ttm_tt_unpopulate for driver use

[Christian König]

Am 21.11.20 um 06:21 schrieb Andrey Grodzovsky:
> It's needed to drop iommu backed pages on device unplug
> before device's IOMMU group is released.

It would be cleaner if we could do the whole handling in TTM. I also 
need to double check what you are doing with this function.

Christian.

>
> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
> ---
>   drivers/gpu/drm/ttm/ttm_tt.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index 1ccf1ef..29248a5 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -495,3 +495,4 @@ void ttm_tt_unpopulate(struct ttm_tt *ttm)
>   	else
>   		ttm_pool_unpopulate(ttm);
>   }
> +EXPORT_SYMBOL(ttm_tt_unpopulate);