ipv6: mcast: RCU conversion
ipv6_sk_mc_lock rwlock becomes a spinlock.
readers (inet6_mc_check()) now takes rcu_read_lock() instead of read
lock. Writers dont need to disable BH anymore.
struct ipv6_mc_socklist objects are reclaimed after one RCU grace
period.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index f95ff8d..04977ee 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -89,10 +89,11 @@
struct ipv6_mc_socklist {
struct in6_addr addr;
int ifindex;
- struct ipv6_mc_socklist *next;
+ struct ipv6_mc_socklist __rcu *next;
rwlock_t sflock;
unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
struct ip6_sf_socklist *sflist;
+ struct rcu_head rcu;
};
struct ip6_sf_list {