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[IPV6]: Remove ndiscs rt6_lock dependency 

(Ab)using rt6_lock wouldn't work anymore if rt6_lock is
converted into a per table lock.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2006-08-04 03:37:36 -07:00 committed by David S. Miller
parent 8161327311
commit 5d0bbeeb14
1 changed files with 11 additions and 5 deletions
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16
net/ipv6/route.c
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@ -747,8 +747,6 @@ static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
}
}
/* Protected by rt6_lock. */
static struct dst_entry *ndisc_dst_gc_list;
static int ipv6_get_mtu(struct net_device *dev);
static inline unsigned int ipv6_advmss(unsigned int mtu)
@ -769,6 +767,9 @@ static inline unsigned int ipv6_advmss(unsigned int mtu)
return mtu;
}
static struct dst_entry *ndisc_dst_gc_list;
DEFINE_SPINLOCK(ndisc_lock);
struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
struct neighbour *neigh,
struct in6_addr *addr,
@ -809,10 +810,10 @@ struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
rt->rt6i_dst.plen = 128;
#endif
write_lock_bh(&rt6_lock);
spin_lock_bh(&ndisc_lock);
rt->u.dst.next = ndisc_dst_gc_list;
ndisc_dst_gc_list = &rt->u.dst;
write_unlock_bh(&rt6_lock);
spin_unlock_bh(&ndisc_lock);
fib6_force_start_gc();
@ -826,8 +827,11 @@ int ndisc_dst_gc(int *more)
int freed;
next = NULL;
freed = 0;
spin_lock_bh(&ndisc_lock);
pprev = &ndisc_dst_gc_list;
freed = 0;
while ((dst = *pprev) != NULL) {
if (!atomic_read(&dst->__refcnt)) {
*pprev = dst->next;
@ -839,6 +843,8 @@ int ndisc_dst_gc(int *more)
}
}
spin_unlock_bh(&ndisc_lock);
return freed;
}