[PATCH] lockdep: annotate skb_queue_head_init
Teach special (multi-initialized) locking code to the lock validator. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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2 changed files with 10 additions and 0 deletions
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@ -604,9 +604,12 @@ static inline __u32 skb_queue_len(const struct sk_buff_head *list_)
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return list_->qlen;
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}
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extern struct lock_class_key skb_queue_lock_key;
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static inline void skb_queue_head_init(struct sk_buff_head *list)
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{
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spin_lock_init(&list->lock);
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lockdep_set_class(&list->lock, &skb_queue_lock_key);
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list->prev = list->next = (struct sk_buff *)list;
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list->qlen = 0;
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}
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@ -70,6 +70,13 @@
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static kmem_cache_t *skbuff_head_cache __read_mostly;
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static kmem_cache_t *skbuff_fclone_cache __read_mostly;
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/*
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* lockdep: lock class key used by skb_queue_head_init():
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*/
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struct lock_class_key skb_queue_lock_key;
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EXPORT_SYMBOL(skb_queue_lock_key);
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/*
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* Keep out-of-line to prevent kernel bloat.
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* __builtin_return_address is not used because it is not always
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