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-rw-r--r--drivers/md/raid5.c14
-rw-r--r--include/linux/llist.h2
-rw-r--r--lib/llist.c22
3 files changed, 24 insertions, 14 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f8b906843926..7f0e17a27aeb 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -293,20 +293,6 @@ static void __release_stripe(struct r5conf *conf, struct stripe_head *sh)
do_release_stripe(conf, sh);
}
-static struct llist_node *llist_reverse_order(struct llist_node *head)
-{
- struct llist_node *new_head = NULL;
-
- while (head) {
- struct llist_node *tmp = head;
- head = head->next;
- tmp->next = new_head;
- new_head = tmp;
- }
-
- return new_head;
-}
-
/* should hold conf->device_lock already */
static int release_stripe_list(struct r5conf *conf)
{
diff --git a/include/linux/llist.h b/include/linux/llist.h
index 8828a78dec9a..fbf10a0bc095 100644
--- a/include/linux/llist.h
+++ b/include/linux/llist.h
@@ -195,4 +195,6 @@ static inline struct llist_node *llist_del_all(struct llist_head *head)
extern struct llist_node *llist_del_first(struct llist_head *head);
+struct llist_node *llist_reverse_order(struct llist_node *head);
+
#endif /* LLIST_H */
diff --git a/lib/llist.c b/lib/llist.c
index 4a70d120138c..ef48b87247ec 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -81,3 +81,25 @@ struct llist_node *llist_del_first(struct llist_head *head)
return entry;
}
EXPORT_SYMBOL_GPL(llist_del_first);
+
+/**
+ * llist_reverse_order - reverse order of a llist chain
+ * @head: first item of the list to be reversed
+ *
+ * Reverse the oder of a chain of llist entries and return the
+ * new first entry.
+ */
+struct llist_node *llist_reverse_order(struct llist_node *head)
+{
+ struct llist_node *new_head = NULL;
+
+ while (head) {
+ struct llist_node *tmp = head;
+ head = head->next;
+ tmp->next = new_head;
+ new_head = tmp;
+ }
+
+ return new_head;
+}
+EXPORT_SYMBOL_GPL(llist_reverse_order);