neigh: reorder fields in struct neighbour

On 64bit arches, there are two 32bit holes that we can remove.

sizeof(struct neighbour) shrinks from 0xf8 to 0xf0 bytes

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 242879b..7d08fd1 100644 (file)
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -94,7 +94,7 @@ struct neighbour {
        struct neighbour        *next;
        struct neigh_table      *tbl;
        struct neigh_parms      *parms;
-       struct net_device               *dev;
+       struct net_device       *dev;
        unsigned long           used;
        unsigned long           confirmed;
        unsigned long           updated;
@@ -102,11 +102,11 @@ struct neighbour {
        __u8                    nud_state;
        __u8                    type;
        __u8                    dead;
+       atomic_t                refcnt;
        atomic_t                probes;
        rwlock_t                lock;
        unsigned char           ha[ALIGN(MAX_ADDR_LEN, sizeof(unsigned long))];
        struct hh_cache         *hh;
-       atomic_t                refcnt;
        int                     (*output)(struct sk_buff *skb);
        struct sk_buff_head     arp_queue;
        struct timer_list       timer;
@@ -163,7 +163,7 @@ struct neigh_table {
        atomic_t                entries;
        rwlock_t                lock;
        unsigned long           last_rand;
-       struct kmem_cache               *kmem_cachep;
+       struct kmem_cache       *kmem_cachep;
        struct neigh_statistics __percpu *stats;
        struct neighbour        **hash_buckets;
        unsigned int            hash_mask;