[PATCH v2] rcu/segcblist: Use WRITE_ONCE() for rclp->len decrement

[Kaushlendra Kumar]

Use WRITE_ONCE() for rclp->len decrement in rcu_cblist_dequeue() to
maintain consistency with rcu_cblist_enqueue(), which already uses
WRITE_ONCE() for rclp->len increment. It maintains consistent access
patterns to the rclp->len field across both enqueue and dequeue operations.

Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@xxxxxxxxx>
---
Changes in v2:
- Revised justification to focus on code consistency rather than
  concurrent access claims.
- Revised commit message to use imperative mood throughout per kernel
  documentation guidelines (suggested by Markus Elfring).

 kernel/rcu/rcu_segcblist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/rcu_segcblist.c b/kernel/rcu/rcu_segcblist.c
index 1693ea22ef1b..e10b36e9de54 100644
--- a/kernel/rcu/rcu_segcblist.c
+++ b/kernel/rcu/rcu_segcblist.c
@@ -71,7 +71,7 @@ struct rcu_head *rcu_cblist_dequeue(struct rcu_cblist *rclp)
 	rhp = rclp->head;
 	if (!rhp)
 		return NULL;
-	rclp->len--;
+	WRITE_ONCE(rclp->len, rclp->len - 1);
 	rclp->head = rhp->next;
 	if (!rclp->head)
 		rclp->tail = &rclp->head;
-- 
2.34.1