ipv6: update the comment in mcast.c
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 4fb761d..d64e263 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -556,9 +556,8 @@
}
err = -EADDRNOTAVAIL;
- /*
- * changes to the ipv6_mc_list require the socket lock and
- * a read lock on ip6_sk_mc_lock. We have the socket lock,
+ /* changes to the ipv6_mc_list require the socket lock and
+ * rtnl lock. We have the socket lock and rcu read lock,
* so reading the list is safe.
*/
@@ -582,9 +581,8 @@
copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
return -EFAULT;
}
- /* changes to psl require the socket lock, a read lock on
- * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
- * have the socket lock, so reading here is safe.
+ /* changes to psl require the socket lock, and a write lock
+ * on pmc->sflock. We have the socket lock so reading here is safe.
*/
for (i = 0; i < copycount; i++) {
struct sockaddr_in6 *psin6;
@@ -2350,7 +2348,7 @@
{
int err;
- /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
+ /* callers have the socket lock and rtnl lock
* so no other readers or writers of iml or its sflist
*/
if (!iml->sflist) {