drm/amdgpu: shadow and mn list are mutually exclusive

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

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files 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 a401fe3bdd26..3b92d5236670 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;
+        };
 };
 
 /**