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authorIngo Molnar <mingo@kernel.org>2020-01-25 10:05:23 +0100
committerIngo Molnar <mingo@kernel.org>2020-01-25 10:05:23 +0100
commitf8a4bb6bfa639fbdd07aede615be6dffe86a9713 (patch)
tree158a3e44edfd02bb81addfb779ea1850114f3361 /include/linux/rculist_nulls.h
parent4703d9119972bf586d2cca76ec6438f819ffa30e (diff)
parent0e247386d9ed5ab8b7dad010cf4b183efeb1e47d (diff)
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney: - Expedited grace-period updates - kfree_rcu() updates - RCU list updates - Preemptible RCU updates - Torture-test updates - Miscellaneous fixes - Documentation updates Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/rculist_nulls.h')
-rw-r--r--include/linux/rculist_nulls.h20
1 files changed, 14 insertions, 6 deletions
diff --git a/include/linux/rculist_nulls.h b/include/linux/rculist_nulls.h
index 61974c4c566b..e5b752027a03 100644
--- a/include/linux/rculist_nulls.h
+++ b/include/linux/rculist_nulls.h
@@ -34,13 +34,21 @@ static inline void hlist_nulls_del_init_rcu(struct hlist_nulls_node *n)
{
if (!hlist_nulls_unhashed(n)) {
__hlist_nulls_del(n);
- n->pprev = NULL;
+ WRITE_ONCE(n->pprev, NULL);
}
}
+/**
+ * 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))
@@ -66,7 +74,7 @@ static inline void hlist_nulls_del_init_rcu(struct hlist_nulls_node *n)
static inline void hlist_nulls_del_rcu(struct hlist_nulls_node *n)
{
__hlist_nulls_del(n);
- n->pprev = LIST_POISON2;
+ WRITE_ONCE(n->pprev, LIST_POISON2);
}
/**
@@ -94,10 +102,10 @@ static inline void hlist_nulls_add_head_rcu(struct hlist_nulls_node *n,
struct hlist_nulls_node *first = h->first;
n->next = first;
- n->pprev = &h->first;
+ WRITE_ONCE(n->pprev, &h->first);
rcu_assign_pointer(hlist_nulls_first_rcu(h), n);
if (!is_a_nulls(first))
- first->pprev = &n->next;
+ WRITE_ONCE(first->pprev, &n->next);
}
/**
@@ -141,7 +149,7 @@ static inline void hlist_nulls_add_tail_rcu(struct hlist_nulls_node *n,
* hlist_nulls_for_each_entry_rcu - iterate over rcu list of given type
* @tpos: the type * to use as a loop cursor.
* @pos: the &struct hlist_nulls_node to use as a loop cursor.
- * @head: the head for your list.
+ * @head: the head of the list.
* @member: the name of the hlist_nulls_node within the struct.
*
* The barrier() is needed to make sure compiler doesn't cache first element [1],
@@ -161,7 +169,7 @@ static inline void hlist_nulls_add_tail_rcu(struct hlist_nulls_node *n,
* iterate over list of given type safe against removal of list entry
* @tpos: the type * to use as a loop cursor.
* @pos: the &struct hlist_nulls_node to use as a loop cursor.
- * @head: the head for your list.
+ * @head: the head of the list.
* @member: the name of the hlist_nulls_node within the struct.
*/
#define hlist_nulls_for_each_entry_safe(tpos, pos, head, member) \