SO_BLOCK_FALLBACK
SO_BLOCK_FALLBACK(so, SOP_BIND(so, name, namelen, flags, cr));
SO_BLOCK_FALLBACK(so, SOP_RECVMSG(so, msg, uiop, cr));
SO_BLOCK_FALLBACK(so, SOP_LISTEN(so, backlog, cr));
SO_BLOCK_FALLBACK(so, SOP_CONNECT(so, name, namelen, fflag, flags, cr));
SO_BLOCK_FALLBACK(so, SOP_ACCEPT(so, fflag, cr, nsop));
SO_BLOCK_FALLBACK(so, SOP_SENDMSG(so, msg, uiop, cr));
SO_BLOCK_FALLBACK(so, SOP_SENDMBLK(so, msg, fflag, cr, mpp));
SO_BLOCK_FALLBACK(so, SOP_SHUTDOWN(so, how, cr));
SO_BLOCK_FALLBACK(so, SOP_GETSOCKNAME(so, addr, addrlen, cr));
SO_BLOCK_FALLBACK(so, SOP_GETPEERNAME(so, addr, addrlen, accept, cr));
SO_BLOCK_FALLBACK(so,
SO_BLOCK_FALLBACK(so,
SO_BLOCK_FALLBACK(so, SOP_IOCTL(so, cmd, arg, mode, cr, rvalp));
SO_BLOCK_FALLBACK(so, so_krecv_set(so, cb, arg));