[dev][virtio] fix warning in virtio-block code
diff --git a/dev/virtio/block/virtio-block.c b/dev/virtio/block/virtio-block.c
index 4c4f5a2..f1df0b7 100644
--- a/dev/virtio/block/virtio-block.c
+++ b/dev/virtio/block/virtio-block.c
@@ -251,7 +251,7 @@
/* see if we need to add more descriptors due to scatter gather */
paddr_t next_pa = PAGE_ALIGN(pa + 1);
desc->len = MIN(next_pa - pa, len);
- LTRACEF("first descriptor va 0x%lx desc->addr 0x%llx desc->len %zu\n", va, desc->addr, desc->len);
+ LTRACEF("first descriptor va 0x%lx desc->addr 0x%llx desc->len %u\n", va, desc->addr, desc->len);
len -= desc->len;
while (len > 0) {
/* amount of source buffer handled by this iteration of the loop */
