VisionFive2 Linux kernel

author: Chunguang Xu <brookxu@tencent.com> 2021-01-25 13:05:28 +0800 committer: Jens Axboe <axboe@kernel.dk> 2021-01-26 13:14:30 -0700 commit: 49d1822bc05e702be1665ffc2092ec5711e77491 parent: 2c2b9fd6b496b3616e9b9537ea0258b3040914f3

Commit Summary:

blkcg: delete redundant get/put operations for queue

Diffstat:

1 file changed, 7 insertions, 5 deletions

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 3465d6ee708e..02ce2058c14b 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1757,12 +1757,15 @@ void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay)
 	if (unlikely(current->flags & PF_KTHREAD))
 		return;
 
-	if (!blk_get_queue(q))
-		return;
+	if (current->throttle_queue != q) {
+		if (!blk_get_queue(q))
+			return;
+
+		if (current->throttle_queue)
+			blk_put_queue(current->throttle_queue);
+		current->throttle_queue = q;
+	}
 
-	if (current->throttle_queue)
-		blk_put_queue(current->throttle_queue);
-	current->throttle_queue = q;
 	if (use_memdelay)
 		current->use_memdelay = use_memdelay;
 	set_notify_resume(current);