[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/block/noop-iosched.c b/src/kernel/linux/v4.14/block/noop-iosched.c
new file mode 100644
index 0000000..2d1b15d
--- /dev/null
+++ b/src/kernel/linux/v4.14/block/noop-iosched.c
@@ -0,0 +1,124 @@
+/*
+ * 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;
+ struct request *rq;
+
+ rq = list_first_entry_or_null(&nd->queue, struct request, queuelist);
+ if (rq) {
+ 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_prev_entry(rq, 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_next_entry(rq, queuelist);
+}
+
+static int noop_init_queue(struct request_queue *q, struct elevator_type *e)
+{
+ struct noop_data *nd;
+ struct elevator_queue *eq;
+
+ eq = elevator_alloc(q, e);
+ if (!eq)
+ return -ENOMEM;
+
+ nd = kmalloc_node(sizeof(*nd), GFP_KERNEL, q->node);
+ if (!nd) {
+ kobject_put(&eq->kobj);
+ return -ENOMEM;
+ }
+ eq->elevator_data = nd;
+
+ INIT_LIST_HEAD(&nd->queue);
+
+ spin_lock_irq(q->queue_lock);
+ q->elevator = eq;
+ spin_unlock_irq(q->queue_lock);
+ return 0;
+}
+
+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.sq = {
+ .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");