From: Eric Dumazet <edumazet@google.com>
Date: Tue, 19 Feb 2013 18:42:03 +0000 (-0800)
Subject: ppp: set qdisc_tx_busylock to avoid LOCKDEP splat
X-Git-Tag: v3.9-rc1~139^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=303c07db487be59ae9fda10600ea65ca11c21497;p=pandora-kernel.git

ppp: set qdisc_tx_busylock to avoid LOCKDEP splat

If a qdisc is installed on a ppp device, its possible to get
a lockdep splat under stress, because nested dev_queue_xmit() can
lock busylock a second time (on a different device, so its a false
positive)

Avoid this problem using a distinct lock_class_key for ppp
devices.

Reported-by: Yanko Kaneti <yaneti@declera.com>
Tested-by: Yanko Kaneti <yaneti@declera.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed