X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Flist%2Flist.h;h=faad86f5c736a3a53ed08c79e74f92c39086a810;hb=c07a2b209d44273098e2d435ebdca82f158c0373;hp=0091ea4b655216754a347cb4ccb655aa8823177e;hpb=e59b7388d8b2b56dc759be7c2dbf63100d2e131f;p=ccan

diff --git a/ccan/list/list.h b/ccan/list/list.h
index 0091ea4b..faad86f5 100644
--- a/ccan/list/list.h
+++ b/ccan/list/list.h
@@ -1,4 +1,4 @@
-/* Licensed under LGPLv2.1+ - see LICENSE file for details */
+/* Licensed under BSD-MIT - see LICENSE file for details */
 #ifndef CCAN_LIST_H
 #define CCAN_LIST_H
 #include <stdbool.h>
@@ -279,6 +279,8 @@ static inline void list_del_from(struct list_head *h, struct list_node *n)
  * Example:
  *	struct child *first;
  *	first = list_top(&parent->children, struct child, list);
+ *	if (!first)
+ *		printf("Empty list!\n");
  */
 #define list_top(h, type, member)					\
 	((type *)list_top_((h), list_off_(type, member)))
@@ -301,6 +303,8 @@ static inline const void *list_top_(const struct list_head *h, size_t off)
  * Example:
  *	struct child *last;
  *	last = list_tail(&parent->children, struct child, list);
+ *	if (!last)
+ *		printf("Empty list!\n");
  */
 #define list_tail(h, type, member) \
 	((type *)list_tail_((h), list_off_(type, member)))