diff options
| author | Thomas Graf <tgraf@suug.ch> | 2006-08-04 03:37:36 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 14:53:38 -0700 |
| commit | 5d0bbeeb144f631150881712607345c532e38e7e (patch) | |
| tree | 379a9e7bd63ecc3a4b3886aa297ba8cf282b273e | |
| parent | 8161327311fe4da1684ed08015e141feb9a0a737 (diff) | |
[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>
| -rw-r--r-- | net/ipv6/route.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index d9baca062d24..ce1f49b595b0 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -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; } |