From: Pavel Emelianov <xemul@sw.ru>
Date: Tue, 17 Apr 2007 19:45:31 +0000 (-0700)
Subject: [NET]: Set a separate lockdep class for neighbour table's proxy_queue
X-Git-Tag: v2.6.21~62^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2ecba71717c4f60671175fd26083c35a4b9ad58;p=pandora-kernel.git

[NET]: Set a separate lockdep class for neighbour table's proxy_queue

Otherwise the following calltrace will lead to a wrong
lockdep warning:

  neigh_proxy_process()
    `- lock(neigh_table->proxy_queue.lock);
  arp_redo /* via tbl->proxy_redo */
  arp_process
  neigh_event_ns
  neigh_update
  skb_queue_purge
    `- lock(neighbor->arp_queue.lock);

This is not a deadlock actually, as neighbor table's proxy_queue
and the neighbor's arp_queue are different queues.

Lockdep thinks there is a deadlock as both queues are initialized
with skb_queue_head_init() and thus have a common class.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

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