[PATCH net-next 04/15] ppp: Remove direct skb_queue_head list pointer access.

[David Miller]

Add a helper, __skb_peek(), and use it in ppp_mp_reconstruct().

Signed-off-by: David S. Miller <da...@davemloft.net>
---
 drivers/net/ppp/ppp_generic.c |  2 +-
 include/linux/skbuff.h        | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 02ad03a2fab7..500bc0027c1b 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -2400,7 +2400,7 @@ ppp_mp_reconstruct(struct ppp *ppp)
 
        if (ppp->mrru == 0)     /* do nothing until mrru is set */
                return NULL;
-       head = list->next;
+       head = __skb_peek(list);
        tail = NULL;
        skb_queue_walk_safe(list, p, tmp) {
        again:
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 17a13e4785fc..89283b77294d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1592,6 +1592,17 @@ static inline struct sk_buff *skb_peek(const struct 
sk_buff_head *list_)
        return skb;
 }
 
+/**
+ *     __skb_peek - peek at the head of a non-empty &sk_buff_head
+ *     @list_: list to peek at
+ *
+ *     Like skb_peek(), but the caller knows that the list is not empty.
+ */
+static inline struct sk_buff *__skb_peek(const struct sk_buff_head *list_)
+{
+       return list_->next;
+}
+
 /**
  *     skb_peek_next - peek skb following the given one from a queue
  *     @skb: skb to start from
-- 
2.17.1