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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-11-12 05:46:50 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-11-12 13:18:57 -0800 |
| commit | 1d7138de878d1d4210727c1200193e69596f93b3 (patch) | |
| tree | f7abb08bfdf35d1e876f93d24ce44072d2f6ed72 /include/linux/inetdevice.h | |
| parent | f5539b5bfa2e00f2a6fd35731db66142a2f327c0 (diff) | |
| download | lwn-1d7138de878d1d4210727c1200193e69596f93b3.tar.gz lwn-1d7138de878d1d4210727c1200193e69596f93b3.zip | |
igmp: RCU conversion of in_dev->mc_list
in_dev->mc_list is protected by one rwlock (in_dev->mc_list_lock).
This can easily be converted to a RCU protection.
Writers hold RTNL, so mc_list_lock is removed, not replaced by a
spinlock.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Cypher Wu <cypher.w@gmail.com>
Cc: Américo Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/inetdevice.h')
| -rw-r--r-- | include/linux/inetdevice.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h index ccd5b07d678d..380ba6bc5db1 100644 --- a/include/linux/inetdevice.h +++ b/include/linux/inetdevice.h @@ -52,9 +52,8 @@ struct in_device { atomic_t refcnt; int dead; struct in_ifaddr *ifa_list; /* IP ifaddr chain */ - rwlock_t mc_list_lock; - struct ip_mc_list *mc_list; /* IP multicast filter chain */ - int mc_count; /* Number of installed mcasts */ + struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ + int mc_count; /* Number of installed mcasts */ spinlock_t mc_tomb_lock; struct ip_mc_list *mc_tomb; unsigned long mr_v1_seen; |