From cd43e26f071524647e660706b784ebcbefbd2e44 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Fri, 22 May 2009 17:17:52 -0400 Subject: block: Expose stacked device queues in sysfs Currently stacking devices do not have a queue directory in sysfs. However, many of the I/O characteristics like sector size, maximum request size, etc. are queue properties. This patch enables the queue directory for MD/DM devices. The elevator code has been modified to deal with queues that do not have an I/O scheduler. Signed-off-by: Martin K. Petersen Signed-off-by: Jens Axboe --- block/blk-sysfs.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'block/blk-sysfs.c') diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 142a4acddd43..3ccdadb8e204 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -395,9 +395,6 @@ int blk_register_queue(struct gendisk *disk) if (WARN_ON(!q)) return -ENXIO; - if (!q->request_fn) - return 0; - ret = kobject_add(&q->kobj, kobject_get(&disk_to_dev(disk)->kobj), "%s", "queue"); if (ret < 0) @@ -405,6 +402,9 @@ int blk_register_queue(struct gendisk *disk) kobject_uevent(&q->kobj, KOBJ_ADD); + if (!q->request_fn) + return 0; + ret = elv_register_queue(q); if (ret) { kobject_uevent(&q->kobj, KOBJ_REMOVE); -- cgit v1.2.3-59-g8ed1b