[BLOCK] Move all core block layer code to new block/ directory
[linux-3.10.git] / block / noop-iosched.c
1 /*
2  * elevator noop
3  */
4 #include <linux/blkdev.h>
5 #include <linux/elevator.h>
6 #include <linux/bio.h>
7 #include <linux/module.h>
8 #include <linux/init.h>
9
10 static void elevator_noop_add_request(request_queue_t *q, struct request *rq)
11 {
12         rq->flags |= REQ_NOMERGE;
13         elv_dispatch_add_tail(q, rq);
14 }
15
16 static int elevator_noop_dispatch(request_queue_t *q, int force)
17 {
18         return 0;
19 }
20
21 static struct elevator_type elevator_noop = {
22         .ops = {
23                 .elevator_dispatch_fn           = elevator_noop_dispatch,
24                 .elevator_add_req_fn            = elevator_noop_add_request,
25         },
26         .elevator_name = "noop",
27         .elevator_owner = THIS_MODULE,
28 };
29
30 static int __init noop_init(void)
31 {
32         return elv_register(&elevator_noop);
33 }
34
35 static void __exit noop_exit(void)
36 {
37         elv_unregister(&elevator_noop);
38 }
39
40 module_init(noop_init);
41 module_exit(noop_exit);
42
43
44 MODULE_AUTHOR("Jens Axboe");
45 MODULE_LICENSE("GPL");
46 MODULE_DESCRIPTION("No-op IO scheduler");