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CAT:NONE; SFS:(4636009)(46966006)(36840700001)(36860700001)(2616005)(26005)(2906002)(7636003)(356005)(5660300002)(1076003)(16526019)(82310400003)(6666004)(186003)(83380400001)(8676002)(336012)(47076005)(316002)(508600001)(54906003)(36906005)(6916009)(8936002)(4326008)(36756003)(426003)(70206006)(6286002)(7696005)(55016002)(86362001)(70586007); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Oct 2021 08:52:20.5644 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6e902f2f-5cfc-4fa5-dbcb-08d9947017d3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.112.34]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT033.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4895 Subject: [dpdk-dev] [PATCH V2 1/3] net: avoid cast-align warning in VLAN insert function X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 strict cast align flag with supporting gcc: gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0 CFLAGS="-Wcast-align=strict" make V=1 -C examples/l2fwd clean static In file included from main.c:35: /dpdk/build/include/rte_ether.h:370:7: warning: cast increases required alignment of target type [-Wcast-align] 370 | 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@dpdk.org Signed-off-by: Eli Britstein Acked-by: Olivier Matz --- lib/net/rte_ether.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/net/rte_ether.h b/lib/net/rte_ether.h index b83e0d3fce..9febb60300 100644 --- a/lib/net/rte_ether.h +++ b/lib/net/rte_ether.h @@ -367,7 +367,7 @@ static inline int rte_vlan_insert(struct rte_mbuf **m) return -EINVAL; oh = rte_pktmbuf_mtod(*m, struct rte_ether_hdr *); - nh = (struct rte_ether_hdr *) + nh = (struct rte_ether_hdr *)(void *) rte_pktmbuf_prepend(*m, sizeof(struct rte_vlan_hdr)); if (nh == NULL) return -ENOSPC; -- 2.28.0.2311.g225365fb51