[PATCH v4 03/14] drm/ttm: Expose ttm_tt_unpopulate for driver use

[Andrey Grodzovsky]

It's needed to drop iommu backed pages on device unplug
before device's IOMMU group is released.

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 7f75a13..f9e0b0d 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -341,3 +341,4 @@ void ttm_tt_unpopulate(struct ttm_bo_device *bdev,
 		ttm_pool_free(&bdev->pool, ttm);
 	ttm->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
 }
+EXPORT_SYMBOL(ttm_tt_unpopulate);
-- 
2.7.4