diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 988fc49..37f5391 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2566,5 +2566,19 @@
 
 	return true;
 }
+
+/**
+ * skb_head_is_locked - Determine if the skb->head is locked down
+ * @skb: skb to check
+ *
+ * The head on skbs build around a head frag can be removed if they are
+ * not cloned.  This function returns true if the skb head is locked down
+ * due to either being allocated via kmalloc, or by being a clone with
+ * multiple references to the head.
+ */
+static inline bool skb_head_is_locked(const struct sk_buff *skb)
+{
+	return !skb->head_frag || skb_cloned(skb);
+}
 #endif	/* __KERNEL__ */
 #endif	/* _LINUX_SKBUFF_H */