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authorEric Dumazet <edumazet@google.com>2013-02-19 10:42:03 -0800
committerDavid S. Miller <davem@davemloft.net>2013-02-19 14:33:55 -0500
commit303c07db487be59ae9fda10600ea65ca11c21497 (patch)
tree23a66e53bed3b6f8093d815890388b9057760bd9 /Documentation/DocBook
parent7cb08d7f3a5ea6131f4f243c2080530ac41cb293 (diff)
downloadlinux-303c07db487be59ae9fda10600ea65ca11c21497.tar.gz
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>
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