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wireguard: no warning about possible alignm. issue

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We locally disable 'address-of-packed-member' warnings because GCC complained
about possible alignment issues when returning a reference to a packed member
as naturally aligned pointer (for some reason only on arm_v8a). We know that
the member is aligned to NETDEV_ALIGN via __attribute__ and that the warning
is therefor unnecessary.

Ref #4519
This commit is contained in:
Martin Stein 2022-05-30 12:46:46 +02:00 committed by Christian Helmuth
parent 48e396913c
commit 9375e8d010
1 changed files with 15 additions and 4 deletions
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19
repos/dde_linux/src/app/wireguard/genode_c_api/wireguard.c
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@ -175,7 +175,17 @@ void genode_wg_genl_family(struct genl_family * family)
struct net_device * genode_wg_net_device(void)
{
/*
* We disable this warning because GCC complained about possible alignment
* issues when returning a reference to the packed member as naturally
* aligned pointer (for some reason only on arm_v8a). However, we know
* that the member is aligned to NETDEV_ALIGN and that the warning is
* therefor unnecessary.
*/
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
return &_genode_wg_net_dev.public_data;
#pragma GCC diagnostic pop
}
void genode_wg_udp_tunnel_sock_cfg(struct udp_tunnel_sock_cfg * cfg)
@ -229,7 +239,8 @@ _genode_wg_config_add_dev(genode_wg_u16_t listen_port,
_genode_wg_net_dev.public_data.rtnl_link_ops = _genode_wg_rtnl_link_ops;
_genode_wg_net_dev.pcpu_refcnt = 0;
genode_wg_arch_net_dev_init(
&_genode_wg_net_dev.public_data, &_genode_wg_net_dev.pcpu_refcnt);
genode_wg_net_device(), &_genode_wg_net_dev.pcpu_refcnt);
_genode_wg_sk_buff.sk = &_genode_wg_sock;
_genode_wg_sock.sk_user_data = &_genode_wg_net_dev.private_data;
@ -265,7 +276,7 @@ _genode_wg_config_add_dev(genode_wg_u16_t listen_port,
/* trigger execution of 'wg_open' */
_genode_wg_net_dev.public_data.netdev_ops->ndo_open(
&_genode_wg_net_dev.public_data);
genode_wg_net_device());
}
@ -487,12 +498,12 @@ void lx_user_init(void)
skb_init();
/* trigger execution of 'wg_setup' */
_genode_wg_rtnl_link_ops->setup(&_genode_wg_net_dev.public_data);
_genode_wg_rtnl_link_ops->setup(genode_wg_net_device());
/* trigger execution of 'wg_newlink' */
_genode_wg_rtnl_link_ops->newlink(
&_genode_wg_src_net,
&_genode_wg_net_dev.public_data,
genode_wg_net_device(),
_genode_wg_tb,
_genode_wg_data,
&_genode_wg_extack);