tree f1c65a6325068ea7baeec716adea5176cdbe6f20
parent e176fe8954a5239c24afe79b1001ba3c29511963
author Thomas Graf <[EMAIL PROTECTED]> Wed, 06 Jul 2005 04:13:41 -0700
committer David S. Miller <[EMAIL PROTECTED]> Wed, 06 Jul 2005 04:13:41 -0700
[NET]: Reduce size of sk_buff by 4 bytes
Reduce local_df to a bit field and ip_summed to a 2 bits
field thus saving 13 bits. Move bit fields, packet type,
and protocol into the spare area between the priority
and the destructor. Saves 4 bytes on both, 32bit and
64bit architectures.
Signed-off-by: Thomas Graf <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
include/linux/skbuff.h | 15 ++++++++-------
1 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -248,17 +248,18 @@ struct sk_buff {
data_len,
mac_len,
csum;
- unsigned char local_df,
- cloned:1,
- nohdr:1,
- pkt_type,
- ip_summed;
__u32 priority;
- unsigned short protocol;
+ __u8 local_df:1,
+ cloned:1,
+ ip_summed:2,
+ nohdr:1;
+ /* 3 bits spare */
+ __u8 pkt_type;
+ __u16 protocol;
void (*destructor)(struct sk_buff *skb);
#ifdef CONFIG_NETFILTER
- unsigned long nfmark;
+ unsigned long nfmark;
__u32 nfcache;
__u32 nfctinfo;
struct nf_conntrack *nfct;
-
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