Introduce the function pskb_network_may_pull_reason() and make
pskb_network_may_pull() a simple inline call to it. The drop reasons of
it just come from pskb_may_pull_reason.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
---
 include/linux/skbuff.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index cf8f6ce06742..fe6f97b550fc 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3114,9 +3114,15 @@ static inline int skb_inner_network_offset(const struct sk_buff *skb)
 	return skb_inner_network_header(skb) - skb->data;
 }
 
+static inline enum skb_drop_reason
+pskb_network_may_pull_reason(struct sk_buff *skb, unsigned int len)
+{
+	return pskb_may_pull_reason(skb, skb_network_offset(skb) + len);
+}
+
 static inline int pskb_network_may_pull(struct sk_buff *skb, unsigned int len)
 {
-	return pskb_may_pull(skb, skb_network_offset(skb) + len);
+	return pskb_network_may_pull_reason(skb, len) == SKB_NOT_DROPPED_YET;
 }
 
 /*
-- 
2.39.2