[PATCH v5 4/7] llist: simplify __llist_del_all

[Andrzej Hajda]

llist_del_all uses xchg, let's use __xchg here.

Signed-off-by: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
---
 include/linux/llist.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/llist.h b/include/linux/llist.h
index 85bda2d02d65be..4dc1d185ea98ab 100644
--- a/include/linux/llist.h
+++ b/include/linux/llist.h
@@ -50,6 +50,7 @@
 
 #include <linux/atomic.h>
 #include <linux/container_of.h>
+#include <linux/non-atomic/xchg.h>
 #include <linux/stddef.h>
 #include <linux/types.h>
 
@@ -241,10 +242,7 @@ static inline struct llist_node *llist_del_all(struct llist_head *head)
 
 static inline struct llist_node *__llist_del_all(struct llist_head *head)
 {
-	struct llist_node *first = head->first;
-
-	head->first = NULL;
-	return first;
+	return __xchg(&head->first, NULL);
 }
 
 extern struct llist_node *llist_del_first(struct llist_head *head);
-- 
2.34.1