linux-kernel - [PATCH] block/rnbd: client: Constify rnbd_mq

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Date:   Sun, 27 Sep 2020 20:47:15 +0200
From:   Rikard Falkeborn <rikard.falkeborn@...il.com>
To:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Danil Kipnis <danil.kipnis@...ud.ionos.com>,
        Jack Wang <jinpu.wang@...ud.ionos.com>,
        Jens Axboe <axboe@...nel.dk>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>
Subject: [PATCH] block/rnbd: client: Constify rnbd_mq_ops

The only usage of rnbd_mq_ops is to assign its address to the ops field
in the blk_mq_tag_set struct, which is a const pointer. Make it const to
allow the compiler to put it in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>
---
 drivers/block/rnbd/rnbd-clt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index d7a69741c0f6..264258ac807a 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -1159,7 +1159,7 @@ static int rnbd_init_request(struct blk_mq_tag_set *set, struct request *rq,
 	return 0;
 }
 
-static struct blk_mq_ops rnbd_mq_ops = {
+static const struct blk_mq_ops rnbd_mq_ops = {
 	.queue_rq	= rnbd_queue_rq,
 	.init_request	= rnbd_init_request,
 	.complete	= rnbd_softirq_done_fn,
-- 
2.28.0