tipc_sub_read
u32 lower = tipc_sub_read(s, seq.lower);
u32 upper = tipc_sub_read(s, seq.upper);
u32 filter = tipc_sub_read(s, filter);
sub->s.seq.type = tipc_sub_read(s, seq.type);
sub->s.timeout = tipc_sub_read(s, timeout);
timeout = tipc_sub_read(&sub->evt.s, timeout);
u32 s_filter = tipc_sub_read(s, filter);