From: Jiri Pirko <jpirko@redhat.com>
Date: Mon, 9 Jan 2012 06:36:54 +0000 (+0000)
Subject: net: introduce netif_addr_lock_nested() and call if when appropriate
X-Git-Tag: v3.3-rc1~134^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2429f7ac2ef429378536d87fcbbf6f424aa5b47f;p=pandora-kernel.git

net: introduce netif_addr_lock_nested() and call if when appropriate

dev_uc_sync() and dev_mc_sync() are acquiring netif_addr_lock for
destination device of synchronization. Since netif_addr_lock is
already held at the time for source device, this triggers lockdep
deadlock warning.

There's no way this deadlock can happen so use spin_lock_nested() to
silence the warning.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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