list: add list_for_each_entry_reverse macro
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
diff --git a/include/list.h b/include/list.h
index cdebe4d..b549c3e 100644
--- a/include/list.h
+++ b/include/list.h
@@ -50,9 +50,15 @@
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
+#define list_last_entry(ptr, type, member) \
+ list_entry((ptr)->prev, type, member)
+
#define list_next_entry(pos, member) \
list_entry((pos)->member.next, typeof(*(pos)), member)
+#define list_prev_entry(pos, member) \
+ list_entry((pos)->member.prev, typeof(*(pos)), member)
+
#define list_for_each_entry(pos, head, member) \
for (pos = list_first_entry(head, typeof(*pos), member); \
&pos->member != (head); \
@@ -64,6 +70,11 @@
&pos->member != (head); \
pos = n, n = list_next_entry(n, member))
+#define list_for_each_entry_reverse(pos, head, member) \
+ for (pos = list_last_entry(head, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_prev_entry(pos, member))
+
struct hlist_head {
struct hlist_node *first;
};