[dpdk-dev] [PATCH 1/3] net: avoid cast-align warning in VLAN insert function

[Olivier Matz]

On Tue, Jul 13, 2021 at 09:49:08AM +0300, Eli Britstein wrote:
> In rte_vlan_insert there is a casting of rte_pktmbuf_prepend returned
> value to (struct rte_ether_hdr *), which causes cast-align warning when
> using gcc flags '-Werror -Wcast-align':
> 
> In file included from .../include/rte_ethdev.h:165,
>                  from lib/netdev-dpdk.c:33:
> .../include/rte_ether.h: In function 'rte_vlan_insert':
> .../include/rte_ether.h:375:7: error: cast increases required alignment
>     of target type [-Werror=cast-align]
>   375 |  nh = (struct rte_ether_hdr *)
>       |       ^
> 
> As the code assumes correct alignment, add first a (void *) casting, to
> avoid the warning.
> 
> Fixes: c974021a5949 ("ether: add soft vlan encap/decap")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Eli Britstein <elibr at nvidia.com>

Acked-by: Olivier Matz <olivier.matz at 6wind.com>