kcov_common_handle
vdev->ud.kcov_handle = kcov_common_handle();
worker->kcov_handle = kcov_common_handle();
struct kcov_common_handle_id kcov_common_handle(void);
EXPORT_SYMBOL(kcov_common_handle);
skb_set_kcov_handle(skb, kcov_common_handle());