[PATCH 02/10] blk-mq: make mq_ops a const pointer

[Jens Axboe]

We never change it, make that clear.

Signed-off-by: Jens Axboe <ax...@fb.com>
Reviewed-by: Bart Van Assche <bart.vanass...@sandisk.com>
---
 block/blk-mq.c         | 2 +-
 include/linux/blk-mq.h | 2 +-
 include/linux/blkdev.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index a8e67a155d04..79e1cb0f7b15 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -639,7 +639,7 @@ struct blk_mq_timeout_data {
 
 void blk_mq_rq_timed_out(struct request *req, bool reserved)
 {
-       struct blk_mq_ops *ops = req->q->mq_ops;
+       const struct blk_mq_ops *ops = req->q->mq_ops;
        enum blk_eh_timer_return ret = BLK_EH_RESET_TIMER;
 
        /*
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 4a2ab5d99ff7..afc81d77e471 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -60,7 +60,7 @@ struct blk_mq_hw_ctx {
 
 struct blk_mq_tag_set {
        unsigned int            *mq_map;
-       struct blk_mq_ops       *ops;
+       const struct blk_mq_ops *ops;
        unsigned int            nr_hw_queues;
        unsigned int            queue_depth;    /* max hw supported */
        unsigned int            reserved_tags;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 83695641bd5e..e19fc8e01fb2 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -407,7 +407,7 @@ struct request_queue {
        dma_drain_needed_fn     *dma_drain_needed;
        lld_busy_fn             *lld_busy_fn;
 
-       struct blk_mq_ops       *mq_ops;
+       const struct blk_mq_ops *mq_ops;
 
        unsigned int            *mq_map;
 
-- 
2.7.4