Commit 1cbb3380 authored Jul 05, 2005 by Thomas Graf Committed by David S. Miller Jul 05, 2005

[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 <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent e176fe89

include/linux/skbuff.h

+8 −7

Original line number	Diff line number	Diff line
		@@ -248,13 +248,14 @@ 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