From 36fc1b2bfcbfe4a81b5afd07072f4232f418bf20 Mon Sep 17 00:00:00 2001
From: Jim Huang <jserv.tw@gmail.com>
Date: Mon, 16 Dec 2024 11:23:13 +0800
Subject: [PATCH] Fix build breakage with older gcc

---
 netdev.c     | 2 +-
 virtio-net.c | 9 ++++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/netdev.c b/netdev.c
index 4a713f7..858a21f 100644
--- a/netdev.c
+++ b/netdev.c
@@ -55,7 +55,7 @@ static int net_init_tap(netdev_t *netdev)
     return 0;
 }
 
-static int net_init_user(netdev_t *netdev)
+static int net_init_user(netdev_t *netdev UNUSED)
 {
     /* TODO: create slirp dev */
     return 0;
diff --git a/virtio-net.c b/virtio-net.c
index 8e38bb6..e8b0f6e 100644
--- a/virtio-net.c
+++ b/virtio-net.c
@@ -121,7 +121,7 @@ static ssize_t handle_read(netdev_t *netdev,
     ssize_t plen = 0;
 #define _(dev) NETDEV_IMPL_##dev
     switch (netdev->type) {
-    case _(tap):
+    case _(tap): {
         net_tap_options_t *tap = (net_tap_options_t *) netdev->op;
         plen = readv(tap->tap_fd, iovs_cursor, niovs);
         if (plen < 0 && (errno == EWOULDBLOCK || errno == EAGAIN)) {
@@ -134,6 +134,7 @@ static ssize_t handle_read(netdev_t *netdev,
                     strerror(errno));
         }
         break;
+    }
     case _(user):
         /* TODO: handle read  */
         break;
@@ -152,7 +153,7 @@ static ssize_t handle_write(netdev_t *netdev,
     ssize_t plen = 0;
 #define _(dev) NETDEV_IMPL_##dev
     switch (netdev->type) {
-    case _(tap):
+    case _(tap): {
         net_tap_options_t *tap = (net_tap_options_t *) netdev->op;
         plen = writev(tap->tap_fd, iovs_cursor, niovs);
         if (plen < 0 && (errno == EWOULDBLOCK || errno == EAGAIN)) {
@@ -165,6 +166,7 @@ static ssize_t handle_write(netdev_t *netdev,
                     strerror(errno));
         }
         break;
+    }
     case _(user):
         /* TODO: handle slirp_input */
         break;
@@ -280,7 +282,7 @@ void virtio_net_refresh_queue(virtio_net_state_t *vnet)
     netdev_impl_t dev_type = vnet->peer.type;
 #define _(dev) NETDEV_IMPL_##dev
     switch (dev_type) {
-    case _(tap):
+    case _(tap): {
         net_tap_options_t *tap = (net_tap_options_t *) vnet->peer.op;
         struct pollfd pfd = {tap->tap_fd, POLLIN | POLLOUT, 0};
         poll(&pfd, 1, 0);
@@ -293,6 +295,7 @@ void virtio_net_refresh_queue(virtio_net_state_t *vnet)
             virtio_net_try_tx(vnet);
         }
         break;
+    }
     case _(user):
         /* TODO: handle slirp input/output */
         break;