diff options
Diffstat (limited to 'ANDROID_3.4.5/block/noop-iosched.c')
-rw-r--r-- | ANDROID_3.4.5/block/noop-iosched.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/ANDROID_3.4.5/block/noop-iosched.c b/ANDROID_3.4.5/block/noop-iosched.c deleted file mode 100644 index 413a0b1d..00000000 --- a/ANDROID_3.4.5/block/noop-iosched.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * elevator noop - */ -#include <linux/blkdev.h> -#include <linux/elevator.h> -#include <linux/bio.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/init.h> - -struct noop_data { - struct list_head queue; -}; - -static void noop_merged_requests(struct request_queue *q, struct request *rq, - struct request *next) -{ - list_del_init(&next->queuelist); -} - -static int noop_dispatch(struct request_queue *q, int force) -{ - struct noop_data *nd = q->elevator->elevator_data; - - if (!list_empty(&nd->queue)) { - struct request *rq; - rq = list_entry(nd->queue.next, struct request, queuelist); - list_del_init(&rq->queuelist); - elv_dispatch_sort(q, rq); - return 1; - } - return 0; -} - -static void noop_add_request(struct request_queue *q, struct request *rq) -{ - struct noop_data *nd = q->elevator->elevator_data; - - list_add_tail(&rq->queuelist, &nd->queue); -} - -static struct request * -noop_former_request(struct request_queue *q, struct request *rq) -{ - struct noop_data *nd = q->elevator->elevator_data; - - if (rq->queuelist.prev == &nd->queue) - return NULL; - return list_entry(rq->queuelist.prev, struct request, queuelist); -} - -static struct request * -noop_latter_request(struct request_queue *q, struct request *rq) -{ - struct noop_data *nd = q->elevator->elevator_data; - - if (rq->queuelist.next == &nd->queue) - return NULL; - return list_entry(rq->queuelist.next, struct request, queuelist); -} - -static void *noop_init_queue(struct request_queue *q) -{ - struct noop_data *nd; - - nd = kmalloc_node(sizeof(*nd), GFP_KERNEL, q->node); - if (!nd) - return NULL; - INIT_LIST_HEAD(&nd->queue); - return nd; -} - -static void noop_exit_queue(struct elevator_queue *e) -{ - struct noop_data *nd = e->elevator_data; - - BUG_ON(!list_empty(&nd->queue)); - kfree(nd); -} - -static struct elevator_type elevator_noop = { - .ops = { - .elevator_merge_req_fn = noop_merged_requests, - .elevator_dispatch_fn = noop_dispatch, - .elevator_add_req_fn = noop_add_request, - .elevator_former_req_fn = noop_former_request, - .elevator_latter_req_fn = noop_latter_request, - .elevator_init_fn = noop_init_queue, - .elevator_exit_fn = noop_exit_queue, - }, - .elevator_name = "noop", - .elevator_owner = THIS_MODULE, -}; - -static int __init noop_init(void) -{ - return elv_register(&elevator_noop); -} - -static void __exit noop_exit(void) -{ - elv_unregister(&elevator_noop); -} - -module_init(noop_init); -module_exit(noop_exit); - - -MODULE_AUTHOR("Jens Axboe"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("No-op IO scheduler"); |