path: root/block/blk-mq.h
diff options
authorMing Lei <>2017-02-22 18:14:00 +0800
committerJens Axboe <>2017-03-08 09:56:12 -0700
commit7ea5fe31c12dd8bcf4a9c5a4a7e8e23826a9a3b8 (patch)
tree6a9e862fb8ceccf5c64663630d5c2df1f5535656 /block/blk-mq.h
parent737f98cfe7de8df7433a4d846850aa8efa44bd48 (diff)
blk-mq: make lifetime consitent between q/ctx and its kobject
Currently from kobject view, both q->mq_kobj and ctx->kobj can be released during one cycle of blk_mq_register_dev() and blk_mq_unregister_dev(). Actually, sw queue's lifetime is same with its request queue's, which is covered by request_queue->kobj. So we don't need to call kobject_put() for the two kinds of kobject in __blk_mq_unregister_dev(), instead we do that in release handler of request queue. Signed-off-by: Ming Lei <> Tested-by: Peter Zijlstra (Intel) <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'block/blk-mq.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h
index ad8bfd7473ef..b79f9a7d8cf6 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,
* sysfs helpers
extern void blk_mq_sysfs_init(struct request_queue *q);
+extern void blk_mq_sysfs_deinit(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);