nlm: Ensure callback code also checks that the files match

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / list.h

diff --git a/include/linux/list.h b/include/linux/list.h
index 6a1f8df9144bcfd5c1af3e9cbad600fe61749c29..83a9576f479f59aa42ee68f1f1c6b362ec2cf0e3 100644 (file)
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -361,6 +361,33 @@ static inline void list_splice_tail_init(struct list_head *list,
 #define list_first_entry(ptr, type, member) \
        list_entry((ptr)->next, type, member)
 
+/**
+ * list_first_entry_or_null - get the first element from a list
+ * @ptr:       the list head to take the element from.
+ * @type:      the type of the struct this is embedded in.
+ * @member:    the name of the list_struct within the struct.
+ *
+ * Note that if the list is empty, it returns NULL.
+ */
+#define list_first_entry_or_null(ptr, type, member) \
+       (!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)
+
+/**
+ * list_next_entry - get the next element in list
+ * @pos:       the type * to cursor
+ * @member:    the name of the list_struct within the struct.
+ */
+#define list_next_entry(pos, member) \
+       list_entry((pos)->member.next, typeof(*(pos)), member)
+
+/**
+ * list_prev_entry - get the prev element in list
+ * @pos:       the type * to cursor
+ * @member:    the name of the list_struct within the struct.
+ */
+#define list_prev_entry(pos, member) \
+       list_entry((pos)->member.prev, typeof(*(pos)), member)
+
 /**
  * list_for_each       -       iterate over a list
  * @pos:       the &struct list_head to use as a loop cursor.