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net: Kill dst->_neighbour, accessors, and final uses. 

No longer used.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-07-02 22:58:02 -07:00
parent d1e31fb02b
commit 36bdbcae2f
2 changed files with 1 additions and 34 deletions
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17
include/net/dst.h
View File

@ -42,7 +42,7 @@ struct dst_entry {
struct dst_entry *from;
};
struct dst_entry *path;
struct neighbour __rcu *_neighbour;
void *__pad0;
#ifdef CONFIG_XFRM
struct xfrm_state *xfrm;
#else
@ -96,21 +96,6 @@ struct dst_entry {
};
};
static inline struct neighbour *dst_get_neighbour_noref(struct dst_entry *dst)
{
return rcu_dereference(dst->_neighbour);
}
static inline struct neighbour *dst_get_neighbour_noref_raw(struct dst_entry *dst)
{
return rcu_dereference_raw(dst->_neighbour);
}
static inline void dst_set_neighbour(struct dst_entry *dst, struct neighbour *neigh)
{
rcu_assign_pointer(dst->_neighbour, neigh);
}
extern u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
extern const u32 dst_default_metrics[RTAX_MAX];

18
net/core/dst.c
View File

@ -171,7 +171,6 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
dst_init_metrics(dst, dst_default_metrics, true);
dst->expires = 0UL;
dst->path = dst;
RCU_INIT_POINTER(dst->_neighbour, NULL);
#ifdef CONFIG_XFRM
dst->xfrm = NULL;
#endif
@ -225,19 +224,12 @@ EXPORT_SYMBOL(__dst_free);
struct dst_entry *dst_destroy(struct dst_entry * dst)
{
struct dst_entry *child;
struct neighbour *neigh;
smp_rmb();
again:
neigh = rcu_dereference_protected(dst->_neighbour, 1);
child = dst->child;
if (neigh) {
RCU_INIT_POINTER(dst->_neighbour, NULL);
neigh_release(neigh);
}
if (!(dst->flags & DST_NOCOUNT))
dst_entries_add(dst->ops, -1);
@ -361,19 +353,9 @@ static void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
if (!unregister) {
dst->input = dst->output = dst_discard;
} else {
struct neighbour *neigh;
dst->dev = dev_net(dst->dev)->loopback_dev;
dev_hold(dst->dev);
dev_put(dev);
rcu_read_lock();
neigh = dst_get_neighbour_noref(dst);
if (neigh && neigh->dev == dev) {
neigh->dev = dst->dev;
dev_hold(dst->dev);
dev_put(dev);
}
rcu_read_unlock();
}
}