__refcount_inc_not_zero
if (__refcount_inc_not_zero(&call->ref, &r)) {
if (__refcount_inc_not_zero(&volume->ref, &r)) {
success = __refcount_inc_not_zero(&cache->ref, &ref);
if (!__refcount_inc_not_zero(&volume->ref, &ref))
return __refcount_inc_not_zero(r, NULL);
if (!call || !__refcount_inc_not_zero(&call->ref, &r))
if (__refcount_inc_not_zero(&conn->ref, &r))
if (local && __refcount_inc_not_zero(&local->ref, &r)) {
if (__refcount_inc_not_zero(&peer->ref, &r))