47 lines
894 B
C
47 lines
894 B
C
/*
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* elevator noop
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*/
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#include <linux/blkdev.h>
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#include <linux/elevator.h>
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#include <linux/bio.h>
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#include <linux/module.h>
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#include <linux/init.h>
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static void elevator_noop_add_request(request_queue_t *q, struct request *rq)
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{
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rq->flags |= REQ_NOMERGE;
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elv_dispatch_add_tail(q, rq);
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}
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static int elevator_noop_dispatch(request_queue_t *q, int force)
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{
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return 0;
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}
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static struct elevator_type elevator_noop = {
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.ops = {
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.elevator_dispatch_fn = elevator_noop_dispatch,
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.elevator_add_req_fn = elevator_noop_add_request,
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},
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.elevator_name = "noop",
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.elevator_owner = THIS_MODULE,
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};
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static int __init noop_init(void)
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{
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return elv_register(&elevator_noop);
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}
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static void __exit noop_exit(void)
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{
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elv_unregister(&elevator_noop);
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}
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module_init(noop_init);
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module_exit(noop_exit);
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MODULE_AUTHOR("Jens Axboe");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("No-op IO scheduler");
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