[PATCH 4/4] workqueue: Use list_last_entry() to get the last idle worker

[Lai Jiangshan <jiangshanlai@gmail.com>]

From: Lai Jiangshan <jiangshan.ljs@antgroup.com>

It is clearer than open code.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
---
 kernel/workqueue.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 3bb71cfd3e06..7a3392aab395 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2940,7 +2940,7 @@ static void idle_worker_timeout(struct timer_list *t)
 		unsigned long expires;
 
 		/* idle_list is kept in LIFO order, check the last one */
-		worker = list_entry(pool->idle_list.prev, struct worker, entry);
+		worker = list_last_entry(&pool->idle_list, struct worker, entry);
 		expires = worker->last_active + IDLE_WORKER_TIMEOUT;
 		do_cull = !time_before(jiffies, expires);
 
@@ -2982,7 +2982,7 @@ static void idle_cull_fn(struct work_struct *work)
 		struct worker *worker;
 		unsigned long expires;
 
-		worker = list_entry(pool->idle_list.prev, struct worker, entry);
+		worker = list_last_entry(&pool->idle_list, struct worker, entry);
 		expires = worker->last_active + IDLE_WORKER_TIMEOUT;
 
 		if (time_before(jiffies, expires)) {
-- 
2.19.1.6.gb485710b