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pkt_sched: Rework {sch,tbf}_tree_lock().

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Make sch_tree_lock() lock the qdisc's root.  All of the
users hold the RTNL semaphore and the root qdisc is not
changing.

Implement tbf_tree_{lock,unlock}() simply in terms of
sch_tree_{lock,unlock}().

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-07-16 03:12:24 -07:00
parent 53049978df
commit 78a5b30b73
1 changed files with 12 additions and 4 deletions
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16
include/net/sch_generic.h
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@ -183,10 +183,18 @@ static inline struct net_device *qdisc_dev(struct Qdisc *qdisc)
extern void qdisc_lock_tree(struct net_device *dev);
extern void qdisc_unlock_tree(struct net_device *dev);
#define sch_tree_lock(q) qdisc_lock_tree(qdisc_dev(q))
#define sch_tree_unlock(q) qdisc_unlock_tree(qdisc_dev(q))
#define tcf_tree_lock(tp) qdisc_lock_tree(qdisc_dev((tp)->q))
#define tcf_tree_unlock(tp) qdisc_unlock_tree(qdisc_dev((tp)->q))
static inline void sch_tree_lock(struct Qdisc *q)
{
spin_lock_bh(qdisc_root_lock(q));
}
static inline void sch_tree_unlock(struct Qdisc *q)
{
spin_unlock_bh(qdisc_root_lock(q));
}
#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
extern struct Qdisc noop_qdisc;
extern struct Qdisc_ops noop_qdisc_ops;