FIB_RES_DEV
ret = err == 0 && FIB_RES_DEV(res) == net_dev;
result = FIB_RES_DEV(res);
nh->fib_nh_dev = dev = FIB_RES_DEV(res);
l3mdev_master_dev_rcu(FIB_RES_DEV(*res)) == l3mdev)
found = FIB_RES_DEV(res);
dev_out = l3mdev_master_dev_rcu(FIB_RES_DEV(*res)) ? :
dev_out = FIB_RES_DEV(*res);