o list.h: implement list_for_each_entry_safe

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/list.h b/include/linux/list.h
index 11b8674c14ff..a6dea8afd99d 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -297,6 +297,19 @@ static inline void list_splice_init(struct list_head *list,
 		     prefetch(pos->member.next))
 
 /**
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos:	the type * to use as a loop counter.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member)			\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+		n = list_entry(pos->member.next, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
  * list_for_each_rcu	-	iterate over an rcu-protected list
  * @pos:	the &struct list_head to use as a loop counter.
  * @head:	the head for your list.