rculist.h: Add list_tail_rcu()

This patch adds the macro list_tail_rcu() and documents it.

Madhuparna Bhowmik committed 6 years ago

Commit afa47fd1 parent 459b5281 file · +10 −0Browse files

Showing the changes to include/linux (1 of 1 file). Show all

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@@ -40,6 +40,16 @@ static inline void INIT_LIST_HEAD_RCU(struct list_head *list) · 39 unmodified lines
40	40	*/
41	41	#define list_next_rcu(list) (((struct list_head __rcu *)(&(list)->next)))
42	42
	43	+/**
	44	+ * list_tail_rcu - returns the prev pointer of the head of the list
	45	+ * @head: the head of the list
	46	+ *
	47	+ * Note: This should only be used with the list header, and even then
	48	+ * only if list_del() and similar primitives are not also used on the
	49	+ * list header.
	50	+ */
	51	+#define list_tail_rcu(head) (((struct list_head __rcu *)(&(head)->prev)))
	52	+
43	53	/*
44	54	* Check during list traversal that we are within an RCU reader
45	55	*/

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