[patch 11/20] hlist: Add hlist_is_last_node() helper

[Thomas Gleixner]

Required to figure out whether the entry is the last one in the hlist.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 include/linux/list.h |   10 ++++++++++
 1 file changed, 10 insertions(+)

Index: b/include/linux/list.h
===================================================================
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -679,6 +679,16 @@ static inline bool hlist_fake(struct hli
 }
 
 /*
+ * Check whether the node is the last node of the head without
+ * accessing head.
+ */
+static inline bool hlist_is_last_node(struct hlist_node *n,
+				      struct hlist_head *h)
+{
+	return !n->next && n->pprev == &h->first;
+}
+
+/*
  * Move a list from one list head to another. Fixup the pprev
  * reference of the first entry if it exists.
  */