+/* same as hpsb_get_tlabel, except that it returns immediately */
+static int hpsb_get_tlabel_atomic(struct hpsb_packet *packet)
+{
+ unsigned long flags, *tp;
+ u8 *next;
+ int tlabel, n = NODEID_TO_NODE(packet->node_id);
+
+ /* Broadcast transactions are complete once the request has been sent.
+ * Use the same transaction label for all broadcast transactions. */
+ if (unlikely(n == ALL_NODES)) {
+ packet->tlabel = 0;
+ return 0;
+ }
+ tp = packet->host->tl_pool[n].map;
+ next = &packet->host->next_tl[n];
+
+ spin_lock_irqsave(&hpsb_tlabel_lock, flags);
+ tlabel = find_next_zero_bit(tp, 64, *next);
+ if (tlabel > 63)
+ tlabel = find_first_zero_bit(tp, 64);
+ if (tlabel > 63) {
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
+ return -EAGAIN;
+ }
+ __set_bit(tlabel, tp);
+ *next = (tlabel + 1) & 63;
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
+
+ packet->tlabel = tlabel;
+ return 0;
+}
+