[patch 47/61] lock validator: special locking: skb_queue_head_init()

[Ingo Molnar]

From: Ingo Molnar <mingo@xxxxxxx>

teach special (multi-initialized) locking code to the lock validator.
Has no effect on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
---
---
 include/linux/skbuff.h |    7 +------
 net/core/skbuff.c      |    9 +++++++++
 2 files changed, 10 insertions(+), 6 deletions(-)

Index: linux/include/linux/skbuff.h
===================================================================
--- linux.orig/include/linux/skbuff.h
+++ linux/include/linux/skbuff.h
@@ -584,12 +584,7 @@ static inline __u32 skb_queue_len(const 
 	return list_->qlen;
 }
 
-static inline void skb_queue_head_init(struct sk_buff_head *list)
-{
-	spin_lock_init(&list->lock);
-	list->prev = list->next = (struct sk_buff *)list;
-	list->qlen = 0;
-}
+extern void skb_queue_head_init(struct sk_buff_head *list);
 
 /*
  *	Insert an sk_buff at the start of a list.
Index: linux/net/core/skbuff.c
===================================================================
--- linux.orig/net/core/skbuff.c
+++ linux/net/core/skbuff.c
@@ -71,6 +71,15 @@
 static kmem_cache_t *skbuff_head_cache __read_mostly;
 static kmem_cache_t *skbuff_fclone_cache __read_mostly;
 
+void skb_queue_head_init(struct sk_buff_head *list)
+{
+	spin_lock_init(&list->lock);
+	list->prev = list->next = (struct sk_buff *)list;
+	list->qlen = 0;
+}
+
+EXPORT_SYMBOL(skb_queue_head_init);
+
 /*
  *	Keep out-of-line to prevent kernel bloat.
  *	__builtin_return_address is not used because it is not always
-
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