netdev - [PATCH 1/3]: netdev: Add addr_list_lock to struct net

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Message-Id: <20080623.205416.255425972.davem@davemloft.net>
Date:	Mon, 23 Jun 2008 20:54:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	netdev@...r.kernel.org
Subject: [PATCH 1/3]: netdev: Add addr_list_lock to struct net_device.


netdev: Add addr_list_lock to struct net_device.

This will be used to protect the per-device unicast and multicast
address lists, as well as the callbacks into the drivers which
configure such state such as ->set_rx_mode() and ->set_multicast_list().

Signed-off-by: David S. Miller <davem@...emloft.net>
---
 include/linux/netdevice.h |    1 +
 net/core/dev.c            |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1304ad2..fb5a0ec 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -590,6 +590,7 @@ struct net_device
 	unsigned char		addr_len;	/* hardware address length	*/
 	unsigned short          dev_id;		/* for shared network cards */
 
+	spinlock_t		addr_list_lock;
 	struct dev_addr_list	*uc_list;	/* Secondary unicast mac addresses */
 	int			uc_count;	/* Number of installed ucasts	*/
 	int			uc_promisc;
diff --git a/net/core/dev.c b/net/core/dev.c
index f6944ec..7b50e8d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3784,6 +3784,7 @@ int register_netdevice(struct net_device *dev)
 	net = dev_net(dev);
 
 	spin_lock_init(&dev->queue_lock);
+	spin_lock_init(&dev->addr_list_lock);
 	spin_lock_init(&dev->_xmit_lock);
 	netdev_set_lockdep_class(&dev->_xmit_lock, dev->type);
 	dev->xmit_lock_owner = -1;
-- 
1.5.6

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