blk-rq-qos: constify rq_qos_ops

These op vectors are constant, so mark them const.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Herrmann <aherrmann@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230203150400.3199230-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 5f28463..6f1da78 100644 (file)
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2832,7 +2832,7 @@ static void ioc_rqos_exit(struct rq_qos *rqos)
        kfree(ioc);
 }
 
-static struct rq_qos_ops ioc_rqos_ops = {
+static const struct rq_qos_ops ioc_rqos_ops = {
        .throttle = ioc_rqos_throttle,
        .merge = ioc_rqos_merge,
        .done_bio = ioc_rqos_done_bio,

diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index 1c394bd..f6aeb3d 100644 (file)
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -650,7 +650,7 @@ static void blkcg_iolatency_exit(struct rq_qos *rqos)
        kfree(blkiolat);
 }
 
-static struct rq_qos_ops blkcg_iolatency_ops = {
+static const struct rq_qos_ops blkcg_iolatency_ops = {
        .throttle = blkcg_iolatency_throttle,
        .done_bio = blkcg_iolatency_done_bio,
        .exit = blkcg_iolatency_exit,

diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c
index 14bee1b..8e83734 100644 (file)
--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c
@@ -296,7 +296,7 @@ void rq_qos_exit(struct request_queue *q)
 }
 
 int rq_qos_add(struct rq_qos *rqos, struct gendisk *disk, enum rq_qos_id id,
-               struct rq_qos_ops *ops)
+               const struct rq_qos_ops *ops)
 {
        struct request_queue *q = disk->queue;
 

diff --git a/block/blk-rq-qos.h b/block/blk-rq-qos.h
index 2255278..2b7b668 100644 (file)
--- a/block/blk-rq-qos.h
+++ b/block/blk-rq-qos.h
@@ -25,7 +25,7 @@ struct rq_wait {
 };
 
 struct rq_qos {
-       struct rq_qos_ops *ops;
+       const struct rq_qos_ops *ops;
        struct request_queue *q;
        enum rq_qos_id id;
        struct rq_qos *next;
@@ -86,7 +86,7 @@ static inline void rq_wait_init(struct rq_wait *rq_wait)
 }
 
 int rq_qos_add(struct rq_qos *rqos, struct gendisk *disk, enum rq_qos_id id,
-               struct rq_qos_ops *ops);
+               const struct rq_qos_ops *ops);
 void rq_qos_del(struct rq_qos *rqos);
 
 typedef bool (acquire_inflight_cb_t)(struct rq_wait *rqw, void *private_data);

diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 75565ae..1a78d54 100644 (file)
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -898,7 +898,7 @@ static const struct blk_mq_debugfs_attr wbt_debugfs_attrs[] = {
 };
 #endif
 
-static struct rq_qos_ops wbt_rqos_ops = {
+static const struct rq_qos_ops wbt_rqos_ops = {
        .throttle = wbt_wait,
        .issue = wbt_issue,
        .track = wbt_track,