[tip: core/rcu] rculist_nulls: Add docbook comments

[tip-bot2 for Madhuparna Bhowmik]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     7f5d51e26a471f771b8dae1b9ef417f5fd5e9c85
Gitweb:        https://git.kernel.org/tip/7f5d51e26a471f771b8dae1b9ef417f5fd5e9c85
Author:        Madhuparna Bhowmik <madhuparnabhowmik04@xxxxxxxxx>
AuthorDate:    Thu, 05 Dec 2019 11:46:49 +05:30
Committer:     Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Fri, 10 Jan 2020 14:00:57 -08:00

rculist_nulls: Add docbook comments

This patch adds docbook comment headers for hlist_nulls_first_rcu()
and hlist_nulls_next_rcu() in rculist_nulls.h.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@xxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
 include/linux/rculist_nulls.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/rculist_nulls.h b/include/linux/rculist_nulls.h
index 517a06f..25952c4 100644
--- a/include/linux/rculist_nulls.h
+++ b/include/linux/rculist_nulls.h
@@ -38,9 +38,17 @@ static inline void hlist_nulls_del_init_rcu(struct hlist_nulls_node *n)
 	}
 }
 
+/**
+ * hlist_nulls_first_rcu - returns the first element of the hash list.
+ * @head: the head of the list.
+ */
 #define hlist_nulls_first_rcu(head) \
 	(*((struct hlist_nulls_node __rcu __force **)&(head)->first))
 
+/**
+ * hlist_nulls_next_rcu - returns the element of the list after @node.
+ * @node: element of the list.
+ */
 #define hlist_nulls_next_rcu(node) \
 	(*((struct hlist_nulls_node __rcu __force **)&(node)->next))