From: David S. Miller <davem@davemloft.net>
Date: Sat, 19 Jul 2008 05:50:15 +0000 (-0700)
Subject: pkt_sched: Manage qdisc list inside of root qdisc.
X-Git-Tag: v2.6.27-rc1~969^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3072367300aa8c779e3a14ee8e89de079e90f3ad;p=pandora-kernel.git

pkt_sched: Manage qdisc list inside of root qdisc.

Idea is from Patrick McHardy.

Instead of managing the list of qdiscs on the device level, manage it
in the root qdisc of a netdev_queue.  This solves all kinds of
visibility issues during qdisc destruction.

The way to iterate over all qdiscs of a netdev_queue is to visit
the netdev_queue->qdisc, and then traverse it's list.

The only special case is to ignore builting qdiscs at the root when
dumping or doing a qdisc_lookup().  That was not needed previously
because builtin qdiscs were not added to the device's qdisc_list.

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