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Subject[PATCH 2/3] blk-mq: cleanup blk_mq_register_dev
Date
nobody invokes blk_mq_register_dev, remove it and change
__blk_mq_register_dev to blk_mq_register_dev. In addition, move
the declaration of blk_mq_register/unregister_dev to block/blk-mq.h
because they are only used by block layer.

Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
---
block/blk-mq-sysfs.c | 14 +-------------
block/blk-mq.h | 3 +++
block/blk-sysfs.c | 2 +-
include/linux/blk-mq.h | 3 ---
4 files changed, 5 insertions(+), 17 deletions(-)

diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index aafb442..ec26745 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -295,7 +295,7 @@ void blk_mq_sysfs_init(struct request_queue *q)
}
}

-int __blk_mq_register_dev(struct device *dev, struct request_queue *q)
+int blk_mq_register_dev(struct device *dev, struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int ret, i;
@@ -330,18 +330,6 @@ int __blk_mq_register_dev(struct device *dev, struct request_queue *q)
return ret;
}

-int blk_mq_register_dev(struct device *dev, struct request_queue *q)
-{
- int ret;
-
- mutex_lock(&q->sysfs_lock);
- ret = __blk_mq_register_dev(dev, q);
- mutex_unlock(&q->sysfs_lock);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(blk_mq_register_dev);
-
void blk_mq_sysfs_unregister(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 89231e4..7f87e03 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -30,6 +30,9 @@ struct blk_mq_ctx {
struct kobject kobj;
} ____cacheline_aligned_in_smp;

+int blk_mq_register_dev(struct device *dev, struct request_queue *q);
+void blk_mq_unregister_dev(struct device *dev, struct request_queue *q);
+
void blk_mq_freeze_queue(struct request_queue *q);
void blk_mq_free_queue(struct request_queue *q);
int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 159c586..96dcbb9 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -897,7 +897,7 @@ int blk_register_queue(struct gendisk *disk)
}

if (q->mq_ops) {
- __blk_mq_register_dev(dev, q);
+ blk_mq_register_dev(dev, q);
blk_mq_debugfs_register(q);
}

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 0a509ae..61b3833 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -201,9 +201,6 @@ enum {
struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *);
struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
struct request_queue *q);
-int blk_mq_register_dev(struct device *, struct request_queue *);
-void blk_mq_unregister_dev(struct device *, struct request_queue *);
-
int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set);
void blk_mq_free_tag_set(struct blk_mq_tag_set *set);

--
2.7.4
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