net: skb_trim explicitely check the linearity instead of data_len

The purpose of the check on data_len is to check linearity, so use the inline
helper for this. No overhead and more explicit.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 8cac356b77b2589146ab2a9c6131f81d970c45fa..aeaad97e6815bd6884d0ec0f93c3fb7646485475 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1442,7 +1442,7 @@ extern int ___pskb_trim(struct sk_buff *skb, unsigned int len);
 
 static inline void __skb_trim(struct sk_buff *skb, unsigned int len)
 {
-       if (unlikely(skb->data_len)) {
+       if (unlikely(skb_is_nonlinear(skb))) {
                WARN_ON(1);
                return;
        }