[NET]: Store skb->timestamp as offset to a base timestamp
Reduces skb size by 8 bytes on 64-bit.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index ef498cb..39a161d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -70,6 +70,8 @@
static kmem_cache_t *skbuff_head_cache;
+struct timeval __read_mostly skb_tv_base;
+
/*
* Keep out-of-line to prevent kernel bloat.
* __builtin_return_address is not used because it is not always
@@ -331,7 +333,7 @@
n->next = n->prev = NULL;
n->sk = NULL;
- C(stamp);
+ C(tstamp);
C(dev);
C(h);
C(nh);
@@ -408,7 +410,7 @@
memcpy(new->cb, old->cb, sizeof(old->cb));
new->local_df = old->local_df;
new->pkt_type = old->pkt_type;
- new->stamp = old->stamp;
+ new->tstamp = old->tstamp;
new->destructor = NULL;
#ifdef CONFIG_NETFILTER
new->nfmark = old->nfmark;
@@ -1645,6 +1647,7 @@
NULL, NULL);
if (!skbuff_head_cache)
panic("cannot create skbuff cache");
+ do_gettimeofday(&skb_tv_base);
}
EXPORT_SYMBOL(___pskb_trim);
@@ -1678,3 +1681,4 @@
EXPORT_SYMBOL(skb_seq_read);
EXPORT_SYMBOL(skb_abort_seq_read);
EXPORT_SYMBOL(skb_find_text);
+EXPORT_SYMBOL(skb_tv_base);