[PATCH 1/2][SRU][F] list: introduce list_for_each_continue()

[Heitor Alves de Siqueira]

From: Pavel Begunkov <asml.silence at gmail.com>

BugLink: https://bugs.launchpad.net/bugs/1837227

As other *continue() helpers, this continues iteration from a given
position.

Signed-off-by: Pavel Begunkov <asml.silence at gmail.com>
Signed-off-by: Jens Axboe <axboe at kernel.dk>
(cherry picked from commit 28ca0d6d39ab1d01c86762c82a585b7cedd2920c)
Signed-off-by: Heitor Alves de Siqueira <halves at canonical.com>
---
 include/linux/list.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/list.h b/include/linux/list.h
index ce19c6b632a5..2980614d2c1b 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -538,6 +538,16 @@ static inline void list_splice_tail_init(struct list_head *list,
 #define list_for_each(pos, head) \
 	for (pos = (head)->next; pos != (head); pos = pos->next)
 
+/**
+ * list_for_each_continue - continue iteration over a list
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @head:	the head for your list.
+ *
+ * Continue to iterate over a list, continuing after the current position.
+ */
+#define list_for_each_continue(pos, head) \
+	for (pos = pos->next; pos != (head); pos = pos->next)
+
 /**
  * list_for_each_prev	-	iterate over a list backwards
  * @pos:	the &struct list_head to use as a loop cursor.
-- 
2.41.0