Add list insert routines

Add new list insertion routines list_insert_before(), list_insert_after(),
and list_add_tail().  Also, change list_add() to use list_insert_after().

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 11 insertions, 3 deletions

diff --git a/lib/list/list.h b/lib/list/list.h
index 3858cf6..fe2c1d3 100644
--- a/lib/list/list.h
+++ b/lib/list/list.h
@@ -31,9 +31,17 @@ struct list {
 	     pos = list_entry(pos->member.next, typeof(*pos), member))
 
 void list_init(struct list *list);
-
-void list_add(struct list *list, struct list_item *item);
-
+void list_insert_before(struct list_item *next, struct list_item *new);
+void list_insert_after(struct list_item *prev, struct list_item *new);
 void list_remove(struct list_item *item);
 
+static inline void list_add(struct list *list, struct list_item *new)
+{
+	list_insert_after(&list->head, new);
+}
+static inline void list_add_tail(struct list *list, struct list_item *new)
+{
+	list_insert_before(&list->head, new);
+}
+
 #endif /* _LIST_H */