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-rw-r--r--include/linux/list_nulls.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/list_nulls.h b/include/linux/list_nulls.h
index 93150ecf3ea4..5d10ae364b5e 100644
--- a/include/linux/list_nulls.h
+++ b/include/linux/list_nulls.h
@@ -56,6 +56,18 @@ static inline int hlist_nulls_empty(const struct hlist_nulls_head *h)
return is_a_nulls(h->first);
}
+static inline void hlist_nulls_add_head(struct hlist_nulls_node *n,
+ struct hlist_nulls_head *h)
+{
+ struct hlist_nulls_node *first = h->first;
+
+ n->next = first;
+ n->pprev = &h->first;
+ h->first = n;
+ if (!is_a_nulls(first))
+ first->pprev = &n->next;
+}
+
static inline void __hlist_nulls_del(struct hlist_nulls_node *n)
{
struct hlist_nulls_node *next = n->next;
@@ -65,6 +77,12 @@ static inline void __hlist_nulls_del(struct hlist_nulls_node *n)
next->pprev = pprev;
}
+static inline void hlist_nulls_del(struct hlist_nulls_node *n)
+{
+ __hlist_nulls_del(n);
+ n->pprev = LIST_POISON2;
+}
+
/**
* hlist_nulls_for_each_entry - iterate over list of given type
* @tpos: the type * to use as a loop cursor.