#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
        ccid2_pr_debug("pipe=%d\n", hctx->ccid2hctx_pipe);
-       ccid2_pr_debug("Sent: seq=%llu\n", seq);
+       ccid2_pr_debug("Sent: seq=%llu\n", (unsigned long long)seq);
        do {
                struct ccid2_seq *seqp = hctx->ccid2hctx_seqt;
 
                while (seqp != hctx->ccid2hctx_seqh) {
                        ccid2_pr_debug("out seq=%llu acked=%d time=%lu\n",
-                                      seqp->ccid2s_seq, seqp->ccid2s_acked,
-                                      seqp->ccid2s_sent);
+                                      (unsigned long long)seqp->ccid2s_seq,
+                                      seqp->ccid2s_acked, seqp->ccid2s_sent);
                        seqp = seqp->ccid2s_next;
                }
        } while (0);
                /* first measurement */
                if (hctx->ccid2hctx_srtt == -1) {
                        ccid2_pr_debug("R: %lu Time=%lu seq=%llu\n",
-                                      r, jiffies, seqp->ccid2s_seq);
+                                      r, jiffies,
+                                      (unsigned long long)seqp->ccid2s_seq);
                        ccid2_change_srtt(hctx, r);
                        hctx->ccid2hctx_rttvar = r >> 1;
                } else {
                        u64 ackno_end_rl;
 
                        dccp_set_seqno(&ackno_end_rl, ackno - rl);
-                       ccid2_pr_debug("ackvec start:%llu end:%llu\n", ackno,
-                                      ackno_end_rl);
+                       ccid2_pr_debug("ackvec start:%llu end:%llu\n",
+                                      (unsigned long long)ackno,
+                                      (unsigned long long)ackno_end_rl);
                        /* if the seqno we are analyzing is larger than the
                         * current ackno, then move towards the tail of our
                         * seqnos.
 
                                        seqp->ccid2s_acked = 1;
                                        ccid2_pr_debug("Got ack for %llu\n",
-                                                      seqp->ccid2s_seq);
+                                                      (unsigned long long)seqp->ccid2s_seq);
                                        ccid2_hc_tx_dec_pipe(sk);
                                }
                                if (seqp == hctx->ccid2hctx_seqt) {
                while (1) {
                        if (!seqp->ccid2s_acked) {
                                ccid2_pr_debug("Packet lost: %llu\n",
-                                              seqp->ccid2s_seq);
+                                              (unsigned long long)seqp->ccid2s_seq);
                                /* XXX need to traverse from tail -> head in
                                 * order to detect multiple congestion events in
                                 * one ack vector.