panthor_vm_root_gem
to_panthor_bo(bo->obj)->exclusive_vm_root_gem != panthor_vm_root_gem(vm));
bo->exclusive_vm_root_gem = panthor_vm_root_gem(vm);
bo->exclusive_vm_root_gem = panthor_vm_root_gem(exclusive_vm);
bo->exclusive_vm_root_gem != panthor_vm_root_gem(vm))
struct drm_gem_object *panthor_vm_root_gem(struct panthor_vm *vm);