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-rw-r--r--include/linux/list.h23
1 files changed, 23 insertions, 0 deletions
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
@@ -184,6 +184,29 @@ static inline void list_move_tail(struct list_head *list,
184} 184}
185 185
186/** 186/**
187 * list_bulk_move_tail - move a subsection of a list to its tail
188 * @head: the head that will follow our entry
189 * @first: first entry to move
190 * @last: last entry to move, can be the same as first
191 *
192 * Move all entries between @first and including @last before @head.
193 * All three entries must belong to the same linked list.
194 */
195static inline void list_bulk_move_tail(struct list_head *head,
196 struct list_head *first,
197 struct list_head *last)
198{
199 first->prev->next = last->next;
200 last->next->prev = first->prev;
201
202 head->prev->next = first;
203 first->prev = head->prev;
204
205 last->next = head;
206 head->prev = last;
207}
208
209/**
187 * list_is_last - tests whether @list is the last entry in list @head 210 * list_is_last - tests whether @list is the last entry in list @head
188 * @list: the entry to test 211 * @list: the entry to test
189 * @head: the head of the list 212 * @head: the head of the list