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-rw-r--r--scripts/kconfig/list.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/scripts/kconfig/list.h b/scripts/kconfig/list.h
index 0ae730be5f49..685d80e1bb0e 100644
--- a/scripts/kconfig/list.h
+++ b/scripts/kconfig/list.h
@@ -51,6 +51,19 @@ struct list_head {
pos = list_entry(pos->member.next, typeof(*pos), member))
/**
+ * 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 cursor.
+ * @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_empty - tests whether a list is empty
* @head: the list to test.
*/
@@ -88,4 +101,31 @@ static inline void list_add_tail(struct list_head *_new, struct list_head *head)
__list_add(_new, head->prev, head);
}
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_del(struct list_head *prev, struct list_head *next)
+{
+ next->prev = prev;
+ prev->next = next;
+}
+
+#define LIST_POISON1 ((void *) 0x00100100)
+#define LIST_POISON2 ((void *) 0x00200200)
+/**
+ * list_del - deletes entry from list.
+ * @entry: the element to delete from the list.
+ * Note: list_empty() on entry does not return true after this, the entry is
+ * in an undefined state.
+ */
+static inline void list_del(struct list_head *entry)
+{
+ __list_del(entry->prev, entry->next);
+ entry->next = (struct list_head*)LIST_POISON1;
+ entry->prev = (struct list_head*)LIST_POISON2;
+}
#endif