[PATCH 5.18 731/879] bfq: Drop pointless unlock-lock pair

Greg Kroah-Hartman
2022-06-08T01:38:20Z

From: Jan Kara <jack@suse.cz>

commit fc84e1f941b91221092da5b3102ec82da24c5673 upstream.

In bfq_insert_request() we unlock bfqd->lock only to call
trace_block_rq_insert() and then lock bfqd->lock again. This is really
pointless since tracing is disabled if we really care about performance
and even if the tracepoint is enabled, it is a quick call.

CC: stable@vger.kernel.org
Tested-by: "yukuai (C)" <yukuai3@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220401102752.8599-5-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
block/bfq-iosched.c | 3 ---
1 file changed, 3 deletions(-)

--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -6154,11 +6154,8 @@ static void bfq_insert_request(struct bl
return;
}

- spin_unlock_irq(&bfqd->lock);
-
trace_block_rq_insert(rq);

- spin_lock_irq(&bfqd->lock);
bfqq = bfq_init_rq(rq);
if (!bfqq || at_head) {
if (at_head)