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

Unified · Split

include/linux/rculist.h+10−0

@@ -40,6 +40,16 @@ static inline void INIT_LIST_HEAD_RCU(struct list_head *list) · 39 unmodified lines
40	*/	40	*/
41	#define list_next_rcu(list) (((struct list_head __rcu *)(&(list)->next)))	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	* Check during list traversal that we are within an RCU reader	54	* Check during list traversal that we are within an RCU reader
45	*/	55	*/