[PATCH 3/3] blk-mq: add percpu_ida kobjects

[Ming Lei <tom.leiming@gmail.com>]

So that the percpu_ida performance can be monitored.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 block/blk-mq-sysfs.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index 8145b5b..4171ae2 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -329,6 +329,8 @@ void blk_mq_unregister_disk(struct gendisk *disk)
 			kobject_del(&ctx->kobj);
 			kobject_put(&ctx->kobj);
 		}
+		percpu_ida_kobject_del(&hctx->tags->free_tags);
+		percpu_ida_kobject_del(&hctx->tags->reserved_tags);
 		kobject_del(&hctx->kobj);
 		kobject_put(&hctx->kobj);
 	}
@@ -362,6 +364,11 @@ int blk_mq_register_disk(struct gendisk *disk)
 		if (ret)
 			break;
 
+		percpu_ida_kobject_add(&hctx->tags->free_tags,
+				&hctx->kobj, "free_tags");
+		percpu_ida_kobject_add(&hctx->tags->reserved_tags,
+				&hctx->kobj, "reserved_tags");
+
 		if (!hctx->nr_ctx)
 			continue;
 
-- 
1.7.9.5