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author | David S. Miller <davem@davemloft.net> | 2008-07-16 01:42:40 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2008-07-17 19:21:19 -0700 |
commit | 7698b4fcabcd790efc4f226bada1e7b5870653af (patch) | |
tree | 031ce7a911fc5bff995421a5615d9ab25416a479 /include/net/sch_generic.h | |
parent | e2627c8c2241bce45e368e150654d076b58a4595 (diff) | |
download | kernel_samsung_espresso10-7698b4fcabcd790efc4f226bada1e7b5870653af.zip kernel_samsung_espresso10-7698b4fcabcd790efc4f226bada1e7b5870653af.tar.gz kernel_samsung_espresso10-7698b4fcabcd790efc4f226bada1e7b5870653af.tar.bz2 |
pkt_sched: Add and use qdisc_root() and qdisc_root_lock().
When code wants to lock the qdisc tree state, the logic
operation it's doing is locking the top-level qdisc that
sits of the root of the netdev_queue.
Add qdisc_root_lock() to represent this and convert the
easiest cases.
In order for this to work out in all cases, we have to
hook up the noop_qdisc to a dummy netdev_queue.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sch_generic.h')
-rw-r--r-- | include/net/sch_generic.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index bc2a09d..9241782 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -161,6 +161,18 @@ struct tcf_proto struct tcf_proto_ops *ops; }; +static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc) +{ + return qdisc->dev_queue->qdisc; +} + +static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc) +{ + struct Qdisc *root = qdisc_root(qdisc); + + return &root->dev_queue->lock; +} + static inline struct net_device *qdisc_dev(struct Qdisc *qdisc) { return qdisc->dev_queue->dev; |