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-rw-r--r--include/linux/idr.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/idr.h b/include/linux/idr.h
index a470ac3ef49d..871a213a8477 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -124,11 +124,13 @@ static inline void *idr_find(struct idr *idr, int id)
* @idp: idr handle
* @entry: the type * to use as cursor
* @id: id entry's key
+ *
+ * @entry and @id do not need to be initialized before the loop, and
+ * after normal terminatinon @entry is left with the value NULL. This
+ * is convenient for a "not found" value.
*/
-#define idr_for_each_entry(idp, entry, id) \
- for (id = 0, entry = (typeof(entry))idr_get_next((idp), &(id)); \
- entry != NULL; \
- ++id, entry = (typeof(entry))idr_get_next((idp), &(id)))
+#define idr_for_each_entry(idp, entry, id) \
+ for (id = 0; ((entry) = idr_get_next(idp, &(id))) != NULL; ++id)
/*
* Don't use the following functions. These exist only to suppress