Move all entries between @first and including @last before @head.
This is useful for LRU lists where a whole block of entries should be
moved to the end of an list.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
include/linux/list.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/include/linux/list.h b/include/linux/list.h
index de04cc5ed536..edb7628e46ed 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -183,6 +183,29 @@ static inline void list_move_tail(struct list_head *list,
list_add_tail(list, head);
}
+/**
+ * list_bulk_move_tail - move a subsection of a list to its tail
+ * @head: the head that will follow our entry
+ * @first: first entry to move
+ * @last: last entry to move, can be the same as first
+ *
+ * Move all entries between @first and including @last before @head.
+ * All three entries must belong to the same linked list.
+ */
+static inline void list_bulk_move_tail(struct list_head *head,
+ struct list_head *first,
+ struct list_head *last)
+{
+ first->prev->next = last->next;
+ last->next->prev = first->prev;
+
+ head->prev->next = first;
+ first->prev = head->prev;
+
+ last->next = head;
+ head->prev = last;
+}
+
/**
* list_is_last - tests whether @list is the last entry in list @head
* @list: the entry to test
--
2.14.1
