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Subject[PATCH 3.2 060/106] net: add kfree_skb_list()
3.2.93-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@decadent.org.uk>

Extracted from upstream commit bd8a7036c06c "gre: fix a possible skb leak".

This patch adds a kfree_skb_list() helper.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -534,6 +534,7 @@ static inline struct rtable *skb_rtable(
}

extern void kfree_skb(struct sk_buff *skb);
+extern void kfree_skb_list(struct sk_buff *segs);
extern void consume_skb(struct sk_buff *skb);
extern void __kfree_skb(struct sk_buff *skb);
extern struct sk_buff *__alloc_skb(unsigned int size,
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -277,15 +277,8 @@ EXPORT_SYMBOL(dev_alloc_skb);

static void skb_drop_list(struct sk_buff **listp)
{
- struct sk_buff *list = *listp;
-
+ kfree_skb_list(*listp);
*listp = NULL;
-
- do {
- struct sk_buff *this = list;
- list = list->next;
- kfree_skb(this);
- } while (list);
}

static inline void skb_drop_fraglist(struct sk_buff *skb)
@@ -436,6 +429,17 @@ void kfree_skb(struct sk_buff *skb)
}
EXPORT_SYMBOL(kfree_skb);

+void kfree_skb_list(struct sk_buff *segs)
+{
+ while (segs) {
+ struct sk_buff *next = segs->next;
+
+ kfree_skb(segs);
+ segs = next;
+ }
+}
+EXPORT_SYMBOL(kfree_skb_list);
+
/**
* consume_skb - free an skbuff
* @skb: buffer to free
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