From 8724dd8c833832c398c3578340374f45d6d9dd0d Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 9 Aug 2021 13:04:07 +0100
Subject: [PATCH] io-wq: improve wq_list_add_tail()
Git-commit: 8724dd8c833832c398c3578340374f45d6d9dd0d
Patch-mainline: v5.15-rc1
References: bsc#1205205

Prepare nodes that we're going to add before actually linking them, it's
always safer and costs us nothing.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/f7e53f0c84c02ed6748c488ed0789b98f8cc6185.1628471125.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 fs/io-wq.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io-wq.h b/fs/io-wq.h
index 3999ee58ff26..308af3928424 100644
--- a/fs/io-wq.h
+++ b/fs/io-wq.h
@@ -44,6 +44,7 @@ static inline void wq_list_add_after(struct io_wq_work_node *node,
 static inline void wq_list_add_tail(struct io_wq_work_node *node,
 				    struct io_wq_work_list *list)
 {
+	node->next = NULL;
 	if (!list->first) {
 		list->last = node;
 		WRITE_ONCE(list->first, node);
@@ -51,7 +52,6 @@ static inline void wq_list_add_tail(struct io_wq_work_node *node,
 		list->last->next = node;
 		list->last = node;
 	}
-	node->next = NULL;
 }
 
 static inline void wq_list_cut(struct io_wq_work_list *list,
-- 
2.35.3