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| author | Arjan van de Ven <arjan@linux.intel.com> | 2006-07-03 00:25:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:10 -0700 |
| commit | 5dd8d1e9eb8b51041505966fe96d081ecbe86efe (patch) | |
| tree | eba7299734a893016d4e91d92cb25974a626bc61 /net | |
| parent | 663d440eaa496db903cc58be04b9b602ba45e43b (diff) | |
| download | kernel_samsung_smdk4412-5dd8d1e9eb8b51041505966fe96d081ecbe86efe.zip kernel_samsung_smdk4412-5dd8d1e9eb8b51041505966fe96d081ecbe86efe.tar.gz kernel_samsung_smdk4412-5dd8d1e9eb8b51041505966fe96d081ecbe86efe.tar.bz2 | |
[PATCH] lockdep: annotate vlan net device as being a special class
vlan network devices have devices nesting below it, and are a special
"super class" of normal network devices; split their locks off into a
separate class since they always nest.
[deweerdt@free.fr: fix possible null-pointer deref]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/8021q/vlan.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index 3948949..458031b 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -364,6 +364,14 @@ static void vlan_transfer_operstate(const struct net_device *dev, struct net_dev } } +/* + * vlan network devices have devices nesting below it, and are a special + * "super class" of normal network devices; split their locks off into a + * separate class since they always nest. + */ +static struct lock_class_key vlan_netdev_xmit_lock_key; + + /* Attach a VLAN device to a mac address (ie Ethernet Card). * Returns the device that was created, or NULL if there was * an error of some kind. @@ -460,6 +468,7 @@ static struct net_device *register_vlan_device(const char *eth_IF_name, new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup); + if (new_dev == NULL) goto out_unlock; @@ -518,6 +527,8 @@ static struct net_device *register_vlan_device(const char *eth_IF_name, if (register_netdevice(new_dev)) goto out_free_newdev; + lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key); + new_dev->iflink = real_dev->ifindex; vlan_transfer_operstate(real_dev, new_dev); linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ |