8728b834b2
Remove the "list" member of struct sk_buff, as it is entirely redundant. All SKB list removal callers know which list the SKB is on, so storing this in sk_buff does nothing other than taking up some space. Two tricky bits were SCTP, which I took care of, and two ATM drivers which Francois Romieu <romieu@fr.zoreil.com> fixed up. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/* net/atm/ipcommon.c - Common items for all ways of doing IP over ATM */
|
|
|
|
/* Written 1996-2000 by Werner Almesberger, EPFL LRC/ICA */
|
|
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/in.h>
|
|
#include <linux/atmdev.h>
|
|
#include <linux/atmclip.h>
|
|
|
|
#include "common.h"
|
|
#include "ipcommon.h"
|
|
|
|
|
|
#if 0
|
|
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
|
|
#else
|
|
#define DPRINTK(format,args...)
|
|
#endif
|
|
|
|
|
|
/*
|
|
* skb_migrate appends the list at "from" to "to", emptying "from" in the
|
|
* process. skb_migrate is atomic with respect to all other skb operations on
|
|
* "from" and "to". Note that it locks both lists at the same time, so beware
|
|
* of potential deadlocks.
|
|
*
|
|
* This function should live in skbuff.c or skbuff.h.
|
|
*/
|
|
|
|
|
|
void skb_migrate(struct sk_buff_head *from,struct sk_buff_head *to)
|
|
{
|
|
unsigned long flags;
|
|
struct sk_buff *skb_from = (struct sk_buff *) from;
|
|
struct sk_buff *skb_to = (struct sk_buff *) to;
|
|
struct sk_buff *prev;
|
|
|
|
spin_lock_irqsave(&from->lock,flags);
|
|
spin_lock(&to->lock);
|
|
prev = from->prev;
|
|
from->next->prev = to->prev;
|
|
prev->next = skb_to;
|
|
to->prev->next = from->next;
|
|
to->prev = from->prev;
|
|
to->qlen += from->qlen;
|
|
spin_unlock(&to->lock);
|
|
from->prev = skb_from;
|
|
from->next = skb_from;
|
|
from->qlen = 0;
|
|
spin_unlock_irqrestore(&from->lock,flags);
|
|
}
|
|
|
|
|
|
EXPORT_SYMBOL(skb_migrate);
|