diff options
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 4307e764ef0..19c96d498e2 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -604,12 +604,17 @@ static inline __u32 skb_queue_len(const struct sk_buff_head *list_) return list_->qlen; } -extern struct lock_class_key skb_queue_lock_key; - +/* + * This function creates a split out lock class for each invocation; + * this is needed for now since a whole lot of users of the skb-queue + * infrastructure in drivers have different locking usage (in hardirq) + * than the networking core (in softirq only). In the long run either the + * network layer or drivers should need annotation to consolidate the + * main types of usage into 3 classes. + */ static inline void skb_queue_head_init(struct sk_buff_head *list) { spin_lock_init(&list->lock); - lockdep_set_class(&list->lock, &skb_queue_lock_key); list->prev = list->next = (struct sk_buff *)list; list->qlen = 0; } @@ -1104,6 +1109,28 @@ static inline struct sk_buff *dev_alloc_skb(unsigned int length) return __dev_alloc_skb(length, GFP_ATOMIC); } +extern struct sk_buff *__netdev_alloc_skb(struct net_device *dev, + unsigned int length, gfp_t gfp_mask); + +/** + * netdev_alloc_skb - allocate an skbuff for rx on a specific device + * @dev: network device to receive on + * @length: length to allocate + * + * Allocate a new &sk_buff and assign it a usage count of one. The + * buffer has unspecified headroom built in. Users should allocate + * the headroom they think they need without accounting for the + * built in space. The built in space is used for optimisations. + * + * %NULL is returned if there is no free memory. Although this function + * allocates memory it can be called from an interrupt. + */ +static inline struct sk_buff *netdev_alloc_skb(struct net_device *dev, + unsigned int length) +{ + return __netdev_alloc_skb(dev, length, GFP_ATOMIC); +} + /** * skb_cow - copy header of skb when it is required * @skb: buffer to cow |