drm_gem_ttm_of_gem
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gobj);
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);