From: Stephen Hemminger <stephen@networkplumber.org>
Date: Mon, 9 Feb 2015 01:14:00 +0000 (+0800)
Subject: virtio: check packet headroom at compile time
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=dec08c28c0b30a6167df6895084fa1f7c6aa2505;p=dpdk.git

virtio: check packet headroom at compile time

Better to check at compile time than fail at runtime.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Acked-by: Huawei Xie <huawei.xie@intel.com>
---

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index 662a49ca89..427341b2dd 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -859,11 +859,7 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
 	struct virtio_hw *hw =
 		VIRTIO_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
 
-	if (RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr)) {
-		PMD_INIT_LOG(ERR,
-			"MBUF HEADROOM should be enough to hold virtio net hdr\n");
-		return -1;
-	}
+	RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
 
 	eth_dev->dev_ops = &virtio_eth_dev_ops;
 	eth_dev->tx_pkt_burst = &virtio_xmit_pkts;