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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2011-12-13 21:29:43 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-14 08:39:30 +0100 |
| commit | f9586f79bf6125ae28fab9f585094c56e8740e83 (patch) | |
| tree | eea369cc3ac135bc9841c453ffdb2b81cc72d884 | |
| parent | rtnetlink: rtnl_link_register() sanity test (diff) | |
| download | linux-f9586f79bf6125ae28fab9f585094c56e8740e83.tar.xz linux-f9586f79bf6125ae28fab9f585094c56e8740e83.zip | |
vlan: add rtnl_dereference() annotations
The original code generates a Sparse warning:
net/8021q/vlan_core.c:336:9:
error: incompatible types in comparison expression (different address spaces)
It's ok to dereference __rcu pointers here because we are holding the
RTNL lock. I've added some calls to rtnl_dereference() to silence the
warning.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/8021q/vlan_core.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index 1414c931bd3f..4d39d802be2c 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -326,14 +326,16 @@ int vlan_vids_add_by_dev(struct net_device *dev, const struct net_device *by_dev) { struct vlan_vid_info *vid_info; + struct vlan_info *vlan_info; int err; ASSERT_RTNL(); - if (!by_dev->vlan_info) + vlan_info = rtnl_dereference(by_dev->vlan_info); + if (!vlan_info) return 0; - list_for_each_entry(vid_info, &by_dev->vlan_info->vid_list, list) { + list_for_each_entry(vid_info, &vlan_info->vid_list, list) { err = vlan_vid_add(dev, vid_info->vid); if (err) goto unwind; @@ -342,7 +344,7 @@ int vlan_vids_add_by_dev(struct net_device *dev, unwind: list_for_each_entry_continue_reverse(vid_info, - &by_dev->vlan_info->vid_list, + &vlan_info->vid_list, list) { vlan_vid_del(dev, vid_info->vid); } @@ -355,13 +357,15 @@ void vlan_vids_del_by_dev(struct net_device *dev, const struct net_device *by_dev) { struct vlan_vid_info *vid_info; + struct vlan_info *vlan_info; ASSERT_RTNL(); - if (!by_dev->vlan_info) + vlan_info = rtnl_dereference(by_dev->vlan_info); + if (!vlan_info) return; - list_for_each_entry(vid_info, &by_dev->vlan_info->vid_list, list) + list_for_each_entry(vid_info, &vlan_info->vid_list, list) vlan_vid_del(dev, vid_info->vid); } EXPORT_SYMBOL(vlan_vids_del_by_dev); |