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>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 8e429d0e0405..0c997767429a 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -364,7 +364,7 @@ struct ipv6_pinfo {
 
         __u32                   dst_cookie;
 
-        struct ipv6_mc_socklist *ipv6_mc_list;
+        struct ipv6_mc_socklist __rcu *ipv6_mc_list;
         struct ipv6_ac_socklist *ipv6_ac_list;
         struct ipv6_fl_socklist *ipv6_fl_list;