[IPV6]: Move nfheader_len into rt6_info

The dst member nfheader_len is only used by IPv6.  It's also currently
creating a rather ugly alignment hole in struct dst.  Therefore this patch
moves it from there into struct rt6_info.

It also reorders the fields in rt6_info to minimize holes.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 857821360bb6..4cefcffe773e 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -99,16 +99,21 @@ struct rt6_info
         u32                             rt6i_flags;
         u32                             rt6i_metric;
         atomic_t                        rt6i_ref;
-        struct fib6_table               *rt6i_table;
 
-        struct rt6key                   rt6i_dst;
-        struct rt6key                   rt6i_src;
+        /* more non-fragment space at head required */
+        unsigned short                  nfheader_len;
 
         u8                              rt6i_protocol;
 
+        struct fib6_table               *rt6i_table;
+
+        struct rt6key                   rt6i_dst;
+
 #ifdef CONFIG_XFRM
         u32                             rt6i_flow_cache_genid;
 #endif
+
+        struct rt6key                   rt6i_src;
 };
 
 static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)