slots++;
 
                if (unlikely((txp->offset + txp->size) > PAGE_SIZE)) {
-                       netdev_err(queue->vif->dev, "Cross page boundary, txp->offset: %x, size: %u\n",
+                       netdev_err(queue->vif->dev, "Cross page boundary, txp->offset: %u, size: %u\n",
                                 txp->offset, txp->size);
                        xenvif_fatal_tx_err(queue->vif);
                        return -EINVAL;
        if (unlikely(queue->grant_tx_handle[pending_idx] !=
                     NETBACK_INVALID_HANDLE)) {
                netdev_err(queue->vif->dev,
-                          "Trying to overwrite active handle! pending_idx: %x\n",
+                          "Trying to overwrite active handle! pending_idx: 0x%x\n",
                           pending_idx);
                BUG();
        }
        if (unlikely(queue->grant_tx_handle[pending_idx] ==
                     NETBACK_INVALID_HANDLE)) {
                netdev_err(queue->vif->dev,
-                          "Trying to unmap invalid handle! pending_idx: %x\n",
+                          "Trying to unmap invalid handle! pending_idx: 0x%x\n",
                           pending_idx);
                BUG();
        }
                /* No crossing a page as the payload mustn't fragment. */
                if (unlikely((txreq.offset + txreq.size) > PAGE_SIZE)) {
                        netdev_err(queue->vif->dev,
-                                  "txreq.offset: %x, size: %u, end: %lu\n",
+                                  "txreq.offset: %u, size: %u, end: %lu\n",
                                   txreq.offset, txreq.size,
                                   (unsigned long)(txreq.offset&~PAGE_MASK) + txreq.size);
                        xenvif_fatal_tx_err(queue->vif);
                                        queue->pages_to_unmap,
                                        gop - queue->tx_unmap_ops);
                if (ret) {
-                       netdev_err(queue->vif->dev, "Unmap fail: nr_ops %tx ret %d\n",
+                       netdev_err(queue->vif->dev, "Unmap fail: nr_ops %tu ret %d\n",
                                   gop - queue->tx_unmap_ops, ret);
                        for (i = 0; i < gop - queue->tx_unmap_ops; ++i) {
                                if (gop[i].status != GNTST_okay)
                                        netdev_err(queue->vif->dev,
-                                                  " host_addr: %llx handle: %x status: %d\n",
+                                                  " host_addr: 0x%llx handle: 0x%x status: %d\n",
                                                   gop[i].host_addr,
                                                   gop[i].handle,
                                                   gop[i].status);
                                &queue->mmap_pages[pending_idx], 1);
        if (ret) {
                netdev_err(queue->vif->dev,
-                          "Unmap fail: ret: %d pending_idx: %d host_addr: %llx handle: %x status: %d\n",
+                          "Unmap fail: ret: %d pending_idx: %d host_addr: %llx handle: 0x%x status: %d\n",
                           ret,
                           pending_idx,
                           tx_unmap_op.host_addr,