From: Pavel Begunkov <asml.silence@gmail.com>
Date: Tue, 19 Oct 2021 22:24:13 +0100
Subject: [PATCH] block: don't bloat enter_queue with percpu_ref
Git-commit: 1497a51a3287959a9eb74e0432203ba3e2dc7347
Patch-mainline: v5.16-rc1
References: jsc#PED-1183

percpu_ref_put() are inlined for performance and bloat the binary, we
don't care about the fail case of blk_try_enter_queue(), so we can
replace it with a call to blk_queue_exit().

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 block/blk-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index c1ba34777c6d..88752e51d2b6 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -404,7 +404,7 @@ static bool blk_try_enter_queue(struct request_queue *q, bool pm)
 	return true;
 
 fail_put:
-	percpu_ref_put(&q->q_usage_counter);
+	blk_queue_exit(q);
 fail:
 	rcu_read_unlock();
 	return false;
-- 
2.35.3