From 5d0bbeeb144f631150881712607345c532e38e7e Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Fri, 4 Aug 2006 03:37:36 -0700 Subject: [PATCH] [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 Signed-off-by: David S. Miller --- net/ipv6/route.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index d9baca062d2..ce1f49b595b 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; } -- 2.39.3