[IPV6]: Make note in headers about shared socket option numbers.

diff --git a/include/linux/in6.h b/include/linux/in6.h
index 8689112d08f3395f4b09762a08052084c49653ea..5b4e89b1ac683e937d1e3f3864a30dd5e0f73ced 100644 (file)
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -183,5 +183,17 @@ struct in6_flowlabel_req
 #define IPV6_IPSEC_POLICY      34
 #define IPV6_XFRM_POLICY       35
 
+/*
+ * Multicast:
+ * Following socket options are shared between IPv4 and IPv6.
+ *
+ * MCAST_JOIN_GROUP            42
+ * MCAST_BLOCK_SOURCE          43
+ * MCAST_UNBLOCK_SOURCE                44
+ * MCAST_LEAVE_GROUP           45
+ * MCAST_JOIN_SOURCE_GROUP     46
+ * MCAST_LEAVE_SOURCE_GROUP    47
+ * MCAST_MSFILTER              48
+ */
 
 #endif