Copy union directly instead of using memcpy().
Note that in this case, a direct assignment is more readable and
consistent with the subsequent assignments.
This addresses the following -Wstringop-overflow warning seen in s390
with defconfig:
drivers/infiniband/hw/mlx4/main.c:296:33: warning: writing 16 bytes into a region of size 0 [-Wstringop-overflow=]
296 | memcpy(&port_gid_table->gids[free].gid,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
297 | &attr->gid, sizeof(attr->gid));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This helps with the ongoing efforts to globally enable
-Wstringop-overflow.
Link: https://github.com/KSPP/linux/issues/308
Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
---
drivers/infiniband/hw/mlx4/main.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 216aacd72e4f..2d2cd17e02e6 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -293,8 +293,7 @@ static int mlx4_ib_add_gid(const struct ib_gid_attr *attr, void **context)
ret = -ENOMEM;
} else {
*context = port_gid_table->gids[free].ctx;
- memcpy(&port_gid_table->gids[free].gid,
- &attr->gid, sizeof(attr->gid));
+ port_gid_table->gids[free].gid = attr->gid;
port_gid_table->gids[free].gid_type = attr->gid_type;
port_gid_table->gids[free].vlan_id = vlan_id;
port_gid_table->gids[free].ctx->real_index = free;
--
2.34.1
