[PATCH v6 02/16] drm/ttm: Expose ttm_tt_unpopulate for driver use

[Felix Kuehling]

Am 2021-05-10 um 12:36 p.m. schrieb Andrey Grodzovsky:
> It's needed to drop iommu backed pages on device unplug
> before device's IOMMU group is released.

I don't see any calls to ttm_tt_unpopulate in the rest of the series
now. Is that an accident, or can this patch be dropped?

Regards,
  Felix


>
> 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 539e0232cb3b..dfbe1ea8763f 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -433,3 +433,4 @@ void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages)
>  	if (!ttm_dma32_pages_limit)
>  		ttm_dma32_pages_limit = num_dma32_pages;
>  }
> +EXPORT_SYMBOL(ttm_tt_unpopulate);