[NET]: Introduce union in struct dst_entry to hold 'next' pointer
This patch introduces an anonymous union to nicely express the fact that all
objects inherited from struct dst_entry should access to the generic 'next'
pointer but with appropriate type verification.
This patch is a prereq before following patches.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/dst.h b/include/net/dst.h
index 62b7e75..5d62342 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -37,7 +37,12 @@
struct dst_entry
{
- struct dst_entry *next;
+ union {
+ struct dst_entry *next;
+ struct rtable *rt_next;
+ struct rt6_info *rt6_next;
+ struct dn_route *dn_next;
+ };
atomic_t __refcnt; /* client references */
int __use;
struct dst_entry *child;
