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-rw-r--r--include/net/route.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/include/net/route.h b/include/net/route.h
index bc40b633a5c..2ea40c1b5e0 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -198,10 +198,13 @@ struct in_ifaddr;
extern void fib_add_ifaddr(struct in_ifaddr *);
extern void fib_del_ifaddr(struct in_ifaddr *, struct in_ifaddr *);
-static inline void ip_rt_put(struct rtable * rt)
+static inline void ip_rt_put(struct rtable *rt)
{
- if (rt)
- dst_release(&rt->dst);
+ /* dst_release() accepts a NULL parameter.
+ * We rely on dst being first structure in struct rtable
+ */
+ BUILD_BUG_ON(offsetof(struct rtable, dst) != 0);
+ dst_release(&rt->dst);
}
#define IPTOS_RT_MASK (IPTOS_TOS_MASK & ~3)