From 01effb0dc1451fad55925873ffbfb88fa4eadce0 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Tue, 11 May 2010 08:57:42 +0200 Subject: block: allow initialization of previously allocated request_queue blk_init_queue() allocates the request_queue structure and then initializes it as needed (request_fn, elevator, etc). Split initialization out to blk_init_allocated_queue_node. Introduce blk_init_allocated_queue wrapper function to model existing blk_init_queue and blk_init_queue_node interfaces. Export elv_register_queue to allow a newly added elevator to be registered with sysfs. Export elv_unregister_queue for symmetry. These changes allow DM to initialize a device's request_queue with more precision. In particular, DM no longer unconditionally initializes a full request_queue (elevator et al). It only does so for a request-based DM device. Signed-off-by: Mike Snitzer Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 3ac2bd2fc485..346fd4856733 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -921,7 +921,12 @@ extern void blk_abort_queue(struct request_queue *); */ extern struct request_queue *blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id); +extern struct request_queue *blk_init_allocated_queue_node(struct request_queue *, + request_fn_proc *, + spinlock_t *, int node_id); extern struct request_queue *blk_init_queue(request_fn_proc *, spinlock_t *); +extern struct request_queue *blk_init_allocated_queue(struct request_queue *, + request_fn_proc *, spinlock_t *); extern void blk_cleanup_queue(struct request_queue *); extern void blk_queue_make_request(struct request_queue *, make_request_fn *); extern void blk_queue_bounce_limit(struct request_queue *, u64); -- cgit v1.2.2