This is a note to let you know that I've just added the patch titled
net: Statically initialize init_net.dev_base_head
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-statically-initialize-init_net.dev_base_head.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 734b65417b24d6eea3e3d7457e1f11493890ee1d Mon Sep 17 00:00:00 2001
From: "Rustad, Mark D" <[email protected]>
Date: Wed, 18 Jul 2012 09:06:07 +0000
Subject: net: Statically initialize init_net.dev_base_head
From: "Rustad, Mark D" <[email protected]>
commit 734b65417b24d6eea3e3d7457e1f11493890ee1d upstream.
This change eliminates an initialization-order hazard most
recently seen when netprio_cgroup is built into the kernel.
With thanks to Eric Dumazet for catching a bug.
Signed-off-by: Mark Rustad <[email protected]>
Acked-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/core/dev.c | 3 ++-
net/core/net_namespace.c | 4 +++-
2 files changed, 5 insertions(+), 2 deletions(-)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6260,7 +6260,8 @@ static struct hlist_head *netdev_create_
/* Initialize per network namespace state */
static int __net_init netdev_init(struct net *net)
{
- INIT_LIST_HEAD(&net->dev_base_head);
+ if (net != &init_net)
+ INIT_LIST_HEAD(&net->dev_base_head);
net->dev_name_head = netdev_create_hash();
if (net->dev_name_head == NULL)
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -24,7 +24,9 @@ static DEFINE_MUTEX(net_mutex);
LIST_HEAD(net_namespace_list);
EXPORT_SYMBOL_GPL(net_namespace_list);
-struct net init_net;
+struct net init_net = {
+ .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
+};
EXPORT_SYMBOL(init_net);
#define INITIAL_NET_GEN_PTRS 13 /* +1 for len +2 for rcu_head */
Patches currently in stable-queue which might be from [email protected]
are
queue-3.0/net-statically-initialize-init_net.dev_base_head.patch
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