[DPDK/ethdev Bug 1823] mlx5: warnings when built with gcc-16

[bugzilla at dpdk.org]

http://bugs.dpdk.org/show_bug.cgi?id=1823

            Bug ID: 1823
           Summary: mlx5: warnings when built with gcc-16
           Product: DPDK
           Version: 25.07
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: stephen at networkplumber.org
  Target Milestone: ---

../drivers/net/mlx5/linux/mlx5_ethdev_os.c: In function ‘mlx5_link_update’:
../drivers/net/mlx5/linux/mlx5_ethdev_os.c:539:15: warning: ‘*(long unsigned
int *)((char *)&dev_link + offsetof(struct rte_eth_link, <U38c0>))’ may be used
uninitialized [-Wmaybe-uninitialized]
  539 |         ret = !!memcmp(&dev->data->dev_link, &dev_link,
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  540 |                        sizeof(struct rte_eth_link));
      |                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../drivers/net/mlx5/linux/mlx5_ethdev_os.c:515:29: note: ‘*(long unsigned int
*)((char *)&dev_link + offsetof(struct rte_eth_link, <U38c0>))’ was declared
here
  515 |         struct rte_eth_link dev_link;
      |                             ^~~~~~~~

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