[dpdk-dev] [RFC PATCH 11/17] virtio: Check for packet headroom at compile time

[Ouyang Changchun]

Better to check at compile time than fail at runtime.

Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 lib/librte_pmd_virtio/virtio_ethdev.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c 
b/lib/librte_pmd_virtio/virtio_ethdev.c
index a07f4ca..c17cac8 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -882,11 +882,7 @@ eth_virtio_dev_init(__rte_unused struct eth_driver 
*eth_drv,
        uint32_t offset_conf = sizeof(config->mac);
        struct rte_pci_device *pci_dev;

-       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;
-- 
1.8.4.2