X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=include%2Flinux%2Fskbuff.h;h=ca8806b693882e9ae933d70d0bb6c4cbd3ca81bd;hb=51dede9c05df2b78acd6dcf6a17d21f0877d2d7b;hp=3d13a4b717e910f653583f957aaded8e6ae63535;hpb=bddea11b1b9385f713006820f16a9fbe5efe6b47;p=linux.git

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 3d13a4b717e9..ca8806b69388 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1821,6 +1821,18 @@ static inline __u32 skb_queue_len(const struct sk_buff_head *list_)
 	return list_->qlen;
 }
 
+/**
+ *	skb_queue_len_lockless	- get queue length
+ *	@list_: list to measure
+ *
+ *	Return the length of an &sk_buff queue.
+ *	This variant can be used in lockless contexts.
+ */
+static inline __u32 skb_queue_len_lockless(const struct sk_buff_head *list_)
+{
+	return READ_ONCE(list_->qlen);
+}
+
 /**
  *	__skb_queue_head_init - initialize non-spinlock portions of sk_buff_head
  *	@list: queue to initialize
@@ -2026,7 +2038,7 @@ static inline void __skb_unlink(struct sk_buff *skb, struct sk_buff_head *list)
 {
 	struct sk_buff *next, *prev;
 
-	list->qlen--;
+	WRITE_ONCE(list->qlen, list->qlen - 1);
 	next	   = skb->next;
 	prev	   = skb->prev;
 	skb->next  = skb->prev = NULL;