[PATCH 4/8] drm/amdgpu: shadow and mn list are mutal exclusive

[Christian König]

From: Christian König <christian.koenig at amd.com>

Save some memory because only on of those is used at all times.

TODO: Should we use an union here or just a single field?

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index a401fe3..3b92d52 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -87,8 +87,11 @@ struct amdgpu_bo {
 
 	struct ttm_bo_kmap_obj		dma_buf_vmap;
 	struct amdgpu_mn		*mn;
-	struct list_head		mn_list;
-	struct list_head		shadow_list;
+
+	union {
+		struct list_head	mn_list;
+		struct list_head	shadow_list;
+	};
 };
 
 /**
-- 
2.7.4