AF_RDS
#define PF_RDS AF_RDS
.family = AF_RDS,
sk = sk_alloc(net, AF_RDS, GFP_KERNEL, &rds_proto, kern);
.family = AF_RDS,
#define PF_RDS AF_RDS
#ifndef AF_RDS
self->fd = socket(AF_RDS, SOCK_SEQPACKET, 0);