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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-04-26 13:47:48 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-26 15:09:04 -0600 |
| commit | 2d0364c8c1a97a1d44760895a982221c06af0f35 (patch) | |
| tree | 815eee282e7f3204d4c723e5b190ffc026f0fb02 /block/blk-mq.h | |
| parent | 1608fd1ca3b9357ea20ffc3a8ad2d1e4b78301a6 (diff) | |
| download | lwn-2d0364c8c1a97a1d44760895a982221c06af0f35.tar.gz lwn-2d0364c8c1a97a1d44760895a982221c06af0f35.zip | |
blk-mq: Register <dev>/queue/mq after having registered <dev>/queue
A later patch in this series will modify blk_mq_debugfs_register()
such that it uses q->kobj.parent to determine the name of a
request queue. Hence make sure that that pointer is initialized
before blk_mq_debugfs_register() is called. To avoid lock inversion,
protect sysfs / debugfs registration with the queue sysfs_lock
instead of the global mutex all_q_mutex.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.h')
| -rw-r--r-- | block/blk-mq.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h index 524f44742816..7d955c756810 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -78,6 +78,7 @@ static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q, */ extern void blk_mq_sysfs_init(struct request_queue *q); extern void blk_mq_sysfs_deinit(struct request_queue *q); +extern int __blk_mq_register_dev(struct device *dev, struct request_queue *q); extern int blk_mq_sysfs_register(struct request_queue *q); extern void blk_mq_sysfs_unregister(struct request_queue *q); extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx); |