ITEM_SIZE
int max_bulk = TIPC_MAX_PUBL / (l->mtu / ITEM_SIZE);
skb = named_prepare_buf(net, PUBLICATION, ITEM_SIZE, 0);
skb = named_prepare_buf(net, WITHDRAWAL, ITEM_SIZE, 0);
ITEM_SIZE) * ITEM_SIZE;
msg_rem -= ITEM_SIZE;
count = msg_data_sz(hdr) / ITEM_SIZE;