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ipv6: mcast: RCU conversion

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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>
This commit is contained in:
Eric Dumazet
2010-11-23 13:12:15 +00:00
committed by David S. Miller
parent 2757a15f08
commit 456b61bca8
3 changed files with 47 additions and 33 deletions
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2
include/linux/ipv6.h
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@@ -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;